Slings Safety Use Inspection

GENERALINFO. AND TRAINING Lift Planning and Evaluation Before using any rigging device it is important to “plan your work and work your plan”. The “front end” time required to develop a successful lift plan may seem unnecessary for small or “non-consequential” loads. There’s always enough time to pre-plan “critical” lifts. After an incident involving what seemed to be a “non-consequential” amount of weight, the time required to mitigate the mess will dwarf the time spent on what was thought to be an unnecessary lift planning session. There’s always enough time to do the job right, the second time. We encourage you to make the “front end” investment in lift planning and successful rigging, before each and every lift. A trained, qualified and knowledgeable user must take into account the following factors and issues and consider all relevant factors not addressed. Among the factors related specifically to slings and rigging, users must perform several activities, including (but not limited to) the following items: LOAD CONSIDERATIONS ENVIRONMENTAL CONSIDERATIONS Wind Weather Visibility Object Temperature Environmental Temperature Chemical Conditions and Exposure Stability of the Ground Underground Installations Weight Dimensions Center of Gravity (CG) Attachment Point Integrity Structural Stability: Bend and Flex Susceptibility to Crushing or Compression Loose Parts that could fall from the Load Combination Loads-Drain Fluids Damaging Surfaces and/or Edges RIGGING CONSIDERATIONS EQUIPMENT AND LIFT CRITERIA Single or Multiple Crane/Hoists Maximum/Planned Operating Radius Allowable Load (From Load Chart) Ratio of Lift to Allowable Load Clearance between Boom and Lift Clearance to Surrounding Facilities Power Lines and Environmental Hazards Ensure a Clear Load Path Emergency/Contingency Set Down Area Thorough Equipment Inspection Sling selection: Type and Capacity Load Control Lift Point over the CG Appropriate Hitch for CG and Load Control Coordination of Multiple Slings Positive Sling to Load Engagement Coefficient of Friction: Sling to Load Load is Free to Move and is not Snagged Sling Capacity is Adequate (Angle and Tension) Adequate Sling Protection PERSONNEL CONSIDERATIONS Area Clear of Unnecessary Personnel Personnel are Trained and Qualified Pre-Lift Plan and Meeting Signals: Visual, Audible, Electronic, etc. Tag Lines and Spotter Requirements Personnel Away from Load and Other Dangers ENGINEERING SERVICES Fee based engineering services, including analysis and consideration of the above variables is available. Please contact us for details. 909.469-2251 2-24-PMS021.indd 16 16 4 www.lift-it.com 3/1/12 3:44 PM Purchase and Use Considerations SLING SELECTION – Prior to selection, read and understand the information contained in our catalog and your responsibilities as detailed in all applicable regulations and standards. Select the sling with suitable characteristics for the load, environment and configuration of lift. RIGGING FACTORS LOAD WEIGHT: Is the weight of the load within the Work Load Limit of the sling(s)? WEIGHT DISTRIBUTION: Uneven load weight distribution imposes disproportionate loading on the individual sling legs. ADEQUATE SLING LENGTH: Slings must be long enough to ensure the Work Load Limit is adequate, when the sling-to-load angle is taken into account. Inadequate consideration has caused “under-rated” slings to fail. LOAD CONTROL: The sling user is responsible for load control. Slings must be rigged in a manner that provides for control of the load. Balancing and supporting the load, from the sides above the center of gravity is critical. Use more than one sling to balance the load so it will not tilt when lifted. CENTER OF GRAVITY: The lifting mechanism must be positioned directly over the center of gravity, before the load is lifted. If this is not done, the load will “change out” and the center of gravity will end up under the lifting fixture. The center of gravity must be addressed and determined through careful experimentation or calculation. POSITIVE LOAD ENGAGEMENT: Poor or inadequate sling-to-load engagement results in the sling “skipping” across load edges. This movement can result in catastrophic sling failure and uncontrolled load descent. Slings equipped with protection have also been cut because of poor sling-to-load engagement. TRAINING All sling users must be trained on the proper use of slings. The American Society of Mechanical Engineers, in the ASME B30.9 Sling Safety Standard, clearly establishes the requirement for training. Section 9-X.1-Training states, “Sling users shall be trained in the selection, inspection, cautions to personnel, effects of the environment and rigging practices, covered by this chapter.” DOL/OSHA Guidance on Safe Sling Use (29 CFR 1910.184) states that a qualified person is one: “who by possession of a recognized degree or certificate of professional standing in an applicable field, or who, by extensive knowledge, training and experience has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work.” It is important that all sling users be knowledgeable about the safe and proper use and application of slings and be thoroughly familiar with manufacturer’s recommendations and all safety information provided with products. In addition, sling users need to be aware of their responsibilities as outlined in all applicable standards and regulations. If you are unsure whether you are properly trained or knowledgeable, DO NOT use slings or rigging devices until you are absolutely sure of what you are doing. SLING PROTECTION Slings must be protected from damaging edges, corners, protrusions or abrasive surfaces by materials of sufficient strength, thickness and construction to prevent sling damage and failure. There are a variety of ways to employ sling protection and prevent sling damage. Regardless of the particular method chosen, the goal is to ensure that the sling maintains its ability to securely lift the load while avoiding contact with damaging or abrasive surfaces under tension. A qualified person must carefully consider the appropriate means to accomplish this goal by selecting sling protection appropriate for the types of exposure damage. Sling protection should not be makeshift (i.e., selecting and using cardboard, work gloves or other such items that were not designed to serve as protection devices). Sling protection may not prevent cutting or other forms of damage. To avoid severe personal injury or death, personnel should be kept away from the load and never be under or near the load, while it is being lifted or suspended. Personnel should never be next to rigging under tension. 909.469-2251 2-24-PMS021.indd 17 17 4 www.lift-it.com 3/1/12 3:44 PM GENERAL INFO. AND TRAINING Purchase and Use Considerations CHEMICAL FACTORS Chemically active environments can affect the strength of rigging products in varying degrees from moderate to total degradation. The materials used in the construction of slings and components must be compatible with the mechanical and environmental requirements imposed. Fumes, sprays, mists, vapors and liquids of acids or alkalis can degrade rigging products. The chemical agents must be identified. Specific time, temperature and concentration factors will assist the user and manufacturer in the selection of the appropriate sling material components. It may be necessary to conduct an on-site suitability test. A sample would be subjected to exposure, under no load. The length of exposure must be determined by the qualified person. After exposure, the sample would be pulled to destruction to determine the retention of tensile strength and evaluated, comparing test results with the strength of an unexposed, “control” sample. We prefer “application” testing to chemical analysis of independent chemical agents done by referencing various charts or technical bulletins. Application testing (where the rubber meets the road) will also provide more accurate information on the cumulative effects of multiple chemical agents. We will match your efforts and assist you in determining the most suitable materials for your specific application. ENVIRONMENTAL CONSIDERATIONS TEMPERATURE: Conventional synthetic products cannot be used in environmental or contact temperatures exceeding 194˚F/90˚C or below -40˚F/-40˚C. Applications outside those parameters can be addressed by consulting us for specific recommendations. ULTRAVIOLET (UV) LIGHT DEGRADATION: Exposure to sources of ultraviolet (UV) light affects the strength of synthetic products in varying degrees from slight to total degradation. Factors which play a part in the degree of strength loss are length of exposure, sling construction and design. Other environmental factors such as weather conditions, elevation and geographic location also affect the degree of degradation. The Web Sling and Tie Down Association (WSTDA) conducted tests to determine the affects of strength loss, as a result of ultraviolet (UV) exposure. The report, WSTDA-UV-Sling-2003 is available at www.wstda.com Many different variables were analyzed in slings that were exposed for a period of 36 months. Nylon and polyester endless slings featuring: treated and untreated webbing, 6800 Lbs. (class 5) and 9800 Lbs. (class 7) materials and single and double ply constructions were evaluated. Initially, nylon web slings lost strength at a slower rate, when compared to polyester slings, but continued to lose strength as exposure time was extended. The loss of strength for nylon slings can be 40 to 60% after exposure periods ranging from 12 to 36 months. In the first year of the study, polyester web slings lost strength at a greater rate, when compared to nylon slings. Loss in strength for polyester slings was approximately 30% after 12 months exposure. Polyester sling strength loss seemed to subside and level off after the initial 12 month period. When slings are not in use, store them in a dark, cool, dry location, free from mechanical and environmental damage. MOISTURE ABSORPTION: When nylon products are “wet” there is an approximate strength loss of 15%. This loss of strength is documented in the 1988 DuPont Technical Information Multifiber Bulletin X272, page 6. Nylon sling strength returns when the sling dries completely. Polyester and High Performance Fiber strength is unaffected by moisture absorption. 909.469-2251 2-24-PMS021.indd 18 18 4 www.lift-it.com 3/1/12 3:44 PM Sling Hitches Slings carry their loads in one of three primary sling hitches. Most slings can be used in all three sling hitches, but some slings are designed for use in only one hitch. Slings have the largest Work Load Limit when used in a basket hitch. The vertical hitch Work Load Limit is 50% of the basket hitch. The synthetic choker hitch Work Load Limit is a maximum of 80% of the vertical hitch Work Load Limit. Slings must be securely attached to the load and rigged in a manner to provide for load control to prevent slipping, sliding and/or loss of the load. A trained, qualified and knowledgeable user must determine the most appropriate method of rigging to help ensure load control and a safe lift. CHOKER HITCH VERTICAL HITCH Sling passes through one end around the load, while the other end is placed on the hook. Load control is limited with only one sling rigged in a choker hitch. A choker hitch will never provide full 360 degree contact. For full contact use a Double Wrap Choke Hitch. See page 24. The Choke Point should always be on the sling body, not on the sling eye, fitting, base of the eye or fitting, splice or tag. BASKET HITCH One end is on the hook, while the other end is attached directly to the load. Use a tagline to prevent load rotation. The sling cradles the load while both eyes are attached overhead. As with the choker hitch, more than one sling may be necessary to help ensure load control. Sling-To-Load Angle The Sling-to-Load Angle is the angle formed between a horizontal line and the sling leg or body. The Sling-to-Load Angle has a dramatic effect on sling Work Load Limits. Slings with adequate capacity to handle the “scale” weight of the load have catastrophically failed because the Sling-to-Load Angle and increased tension were not taken into account. This principle applies in a number of conditions, including when one sling is used to lift at an angle and when a basket hitch or multileg bridle sling is used. When selecting a sling, always consider the Sling-to-Load Angle and the tension that will be applied to the sling. As the Sling-To-Load Angle decreases, the tension on the sling leg(s) increases. Illustrated left- Increased tension is magnified by any change from vertical to horizontal lifting. Increased tension is imposed on the sling leg(s) when the legs are used at angles less than 90°. SLING-TO-LOAD ANGLE A The horizontal angle formed between the sling leg and the “top” of the load. SLING ANGLE - REDUCED WORK LOAD METHOD For years sling users have used angles to determine sling adequacy. One approach has been to determine the Sling-to-Load Angle and multiply the Work Load Limit by the Loss Factor for the specific angle. The result is the REDUCED WORK LOAD LIMIT. LOSS FACTOR CHART Angle “A” Degrees Loss Factor Angle “A” Degrees Loss Factor 90 1.000 55 .8192 85 .9962 50 .7660 80 .9848 45 .7071 3. Multiply the Work Load Limit (per leg) by the Loss Factor to determine the reduced Work Load Limit (per Leg). 75 .9659 40 .6428 70 .9397 35 .5736 The result is the reduced Work Load Limit. 65 .9063 30 .5000 60 .8660 25 .4226 1. Calculate the Sling to Load Angle. 2. Determine the corresponding Loss Factor. Sling angles less than 30° should not be used, unless approved by a qualified person. A BASKET WORK LOAD LIMIT OF 10,000 LBS. CHANGES AS THE SLING TO LOAD ANGLE CHANGES AT AT AT AT 90˚ - WORK LOAD LIMIT = 60˚ - WORK LOAD LIMIT = 45˚ - WORK LOAD LIMIT = 30˚ - WORK LOAD LIMIT = 5,000 Lbs. 5,000 Lbs. 4,330 Lbs. 4,330 Lbs. 10,000 Lbs. 10,000 Lbs. 3,536 Lbs. 3,536 Lbs. 2,500 Lbs. 2,500 Lbs. 10,000 Lbs. 10,000 Lbs. SLING-TO-LOAD ANGLE (DEGREES) 90° 60° 45° 30° WORK LOAD LIMIT X LOSS FACTOR 10,000 Lbs. x 1.000 10,000 Lbs. x .8660 10,000 Lbs. x .7071 10,000 Lbs. x .5000 REDUCED WORK LOAD LIMIT 10,000 Lbs. 8660 Lbs. 7071 Lbs. 5000 Lbs. 909.469-2251 2-24-PMS021.indd 19 5,000 LBS. PER LEG 4,330 LBS. PER LEG 3,536 LBS. PER LEG 2,500 LBS. PER LEG 19 4 www.lift-it.com 3/1/12 3:44 PM 070 Lbs.742 2. Determine the Choker Hitch Angle and multiply the Choker Hitch Work Load Limit by the appropriate Reduction Factor.indd 20 Choker Hitch Angle at 0 degree. 10.90 . 10.000 Lbs.58 0 .000 10.000 PER LEG SLING-TO-LOAD ANGLE (DEGREES) LOAD WEIGHT X TENSION FACTOR INCREASED SLING TENSION 5. 70 1. CHOKER HITCH ANGLE REDUCTION CHART Choker Hitch Angle (Degrees) Reduction Factor 120 .000 10.com 3/1/12 3:44 PM . 7. 90° 60° 0°-30° Rigging from a Supporting Structure.000 PER LEG = 5. 14.120 .000 Lbs.000 Lbs. Choker Work Load Limits must be adjusted.000 3. Determine the corresponding Tension Factor. The result is the actual.000 Lbs. 10.550 Lbs. TENSION FACTOR CHART ANGLE “A” DEGREES TENSION FACTOR ANGLE “A” DEGREES TENSION FACTOR 90 1.00 105 .155 25 2. 11.775 Lbs. The result is the INCREASED TENSION or actual loading on the sling leg(s). Calculate the Sling to Load Angle. X 1. SLING TENSION INCREASES AS THE SLING-TO-LOAD ANGLE DECREASES AT AT AT AT 90˚ 60˚ 45˚ 30˚ - SLING SLING SLING SLING TENSION TENSION TENSION TENSION = 5. The user must first determine the angle and multiply the load weight (per leg) by the tension factor for the specific angle.105 .414 10.000 45° 30° 10. Two examples of slings used at 0 degree Choker Hitch Angle.414 75 1.000 90° 60° 7. 10.50 909.000 Lbs. Multiply the load weight (per leg) by the Tension Factor to determine the increased tension on the sling leg(s). Choker Hitch Angle Whenever a sling is used in a choker hitch and results in a Choker Hitch Angle less than 120 degrees.180 1.000 Lbs.155 10.000 55 1. X 1. 20. Choker Hitch Angle 120° Supporting Structure 135° 180° Choker Hitch Angle at 0 degree.035 40 1.305 80 1.070 PER LEG = 10.104 30 2. unless approved by a qualified person.000 Lbs.015 45 1.000 Lbs.064 35 1.221 85 1.140 Lbs.775 Lbs.000 10. 65 1.000 Lbs.000 Lbs.82 90 . 5. AND TRAINING Sling-To-Load Angle SLING ANGLE – INCREASED TENSION METHOD A more salient approach to determine sling adequacy is the calculation of INCREASED TENSION resulting from the Sling-to-Load Angle.lift-it.070 Lbs. 5.60 .GENERAL INFO.775 PER LEG = 7.71 60 .004 50 1. reduced Choker Work Load Limit.000 10. 5. LOAD Controlling a load with a high center of gravity. 20 4 www. 60 1.555 1. X 1.364 Sling angles less than 30° should not be used. This approach has the distinct advantage of enabling the sling user to determine the required sling strength requirement. X 2.469-2251 2-24-PMS021. Leg Length/Headroom Calculating the tension imposed on slings or individual legs of a multi-part sling system will enable the sling user to select slings with adequate Work Load Limits.) Divide the load weight by the number of sling legs. Unstable Unstable Stable Lift point is not over CG. (SOL) 3) Multiply Load Angle Factor by the Share of the Load to determine Sling Tension. ÷ 3 legs = 4.469-2251 2-24-PMS021. 3) Sling attachment points being on the same horizontal plane. Example: 1. For best control. L (20 Ft.) Load weight ÷ number of legs = Share of the Load (SOL) Example: 12. 909.320 Lbs. Load will shift until CG settles below the suspension point. Lift point is below CG and only two slings used. The user must be assured. Sling Tension . 2. (Before) (After) Multiple factors must be taken into consideration to ensure that load control and stability are attained.indd 21 21 4 www.Center of Gravity (CG) It is always important to rig and control the load so that stability is achieved. Determining the location of the Center of Gravity (CG) is vital to achieving load control. These measures may not guarantee load control. The CG is the point where the load weight is concentrated and is the balance point for an object. when you know the leg Length (L) and Headroom (H).000 Lbs. Unless restrained. attach the slings above the CG.000 Lbs. A load with a “high” center of gravity can rotate in certain sling hitches.33 Load Angle Factor (LAF) 2) Determine the Share of the Load (SOL) for the individual sling legs: H (15 Ft.lift-it. Load Angle Factor x Share of the Load = Tension LAF x SOL = Tension Please Note: Tension calculations are based upon: 1) Sling attachment points being equidistant from the center of gravity. 2) Sling attachment points being equidistant to each other. Use the following steps to calculate the tension imposed upon the individual sling legs.000 = 5. 4) Equal sling leg lengths. The Center of Gravity when suspended will: 1.com 3/1/12 3:45 PM . the CG will move directly under the suspension point.33 x 4. based upon the specific application that selected methods are suitable and comply with all applicable standards and regulations. The CG will move to the lowest point possible. When this is not possible keep the CG contained with three or four sling legs or use basket or choker hitches with wraps. 1) Determine the Load Angle Factor (LAF): Divide the leg Length (L) by the Headroom (H) L ÷ H = LAF Example: 20 ÷ 15 = 1. LEG (L1) SLING TENSION 20 FT. complex calculations are required to determine sling tension when the slings are attached at different horizontal planes.25 Share of the Load 12 . The PROPORTIONAL SHARE OF THE LOAD (SOL) must be determined and multiplied by the LOAD ANGLE FACTOR (LAF) to determine SLING TENSION.indd 22 6 ft (d1) 18 ft 22 4 12 ft (d2) 7.277.752. 13 FT.250 Lbs. If a sling is attached 25% of the distance from the Center of Gravity.5 5 x = 2.487 Lbs.733 Lbs. distance between the sling attachment points and the spatial relationship between the sling attachment points and the Center of Gravity. 28.DIFFERENT HORIZONTAL PLANES Different.5ft (L2) 5ft (H) 49.000 = 13. x x L1 Load Angle Factor H 6 = 5 Sling Tension 6ft (L1) = 1. x L2 Load Angle Factor H = Sling Tension 10. if a sling is attached 75% of the distance from the Center of Gravity. TENSION www.lift-it.600 1.75 Distance from CG .GENERAL INFO.75 x 55. SLING TENSION .com 3/1/12 3:45 PM .20 10.600 x 6 x 20 13 ft (L1) (12 x 11. LEG 9 Proportional Share of the Load 55.750 Lbs. 9.000 Lbs.500 Lbs.469-2251 2-24-PMS021. LEG 3 Proportional Share of the Load = .5) + (6 x 16) 2.875 Lbs.PROPORTIONAL SHARE OF THE LOAD More complex calculations are required when the slings are not placed equidistantly from the center of gravity or when the Center of Gravity is not equidistant from the sling attachment points.5 ft (H1) 14. 12ft. that sling will carry 25% of the load weight. = . 6 FT.000 234 234 14.10 3ft.5) + (6 x 16) 20 ft (L2) 16 ft (H2) (12 x 11. (Please note: Twin-Path® Adjustable Bridle is depicted).5 FT. An inverse proportional relationship exists between Distance and Share of the Load.600 x 12 x 13 11. 9ft.75 Share of the Load 12 . AND TRAINING Advanced Tension Calculations SLING TENSION . 10. Likewise. that sling will carry 75% of the load weight. TENSION 909. LEG (L2) SLING TENSION W x d2 x L1 W x d1 x L2 (d2 x H1) + (d1 x H2) (d2 x H1) + (d1 x H2) 14.600 Lbs.000 = 41.25 x 55.25 Distance from CG . Sling tension is a function of sling length. load engagement system. North to South. The adjustable basket hitch allows the sling user to adjust the length of the legs to raise the load level. be sure when using multiple slings that they do not cross over each other. Right Right Eye & Eye Slings (North to South) Wrong Wrong Inverted Basket (East to West) If practical. (One sling is depicted for illustrative purposes only). It is dangerous to use only one sling to lift a load which tends to shift and slide out. lower and correct the position of the slings until the balance point is achieved and the load does not tilt. Raise the load carefully. Extra care should be taken when using slings in a basket hitch to balance the load to prevent slippage. The Adjustable Basket Hitch Work Load Limit is identical to the “regular” basket hitch rating. Ensure that lifting devices are directly over the center of gravity. Balancing the load is critical and necessary to prevent sling damage and failure. The rating must be adjusted for the Sling-to-Load Angle. twisting and knotting radically reduce sling Work Load Limits. When the load is “wrapped” the sling Work Load Limit is not increased. Slings “skipping” through hardware components can become damaged.469-2251 2-24-PMS021. it must be discovered by cautious experimentation or calculation.lift-it. If the load is not level. more than one sling may be necessary to control the load. Wrapping the load is a legitimate method of minimizing excessive sling length.Rigging and Hitch Information GENERAL INFORMATION ADJUSTABLE BASKET HITCH Slings should be rigged in a manner that provides proper load control. Be sure to employ the “four ends down”.indd 23 23 4 www. Other methods. 909. but load control is. such as.com 3/1/12 3:45 PM . As with the choker hitch. If this is difficult to determine. Another effective solution is an Adjustable Rope Sling featured on pages 127 and 128. take a full wrap around the load to grip it firmly. BASKET HITCHES Inverted basket hitches are referred to as equalizing hitches because the sling is free to slip through the hook based upon the load weight distribution. Adjustable hitches are particularly useful with loads having uneven load weight distribution resulting in an off-set center of gravity. com 3/1/12 3:45 PM . one of the legs will share a greater portion of the load and equalization will not occur. widths) and roundslings rated at less than 7000 Lbs. Adjustable hitches are particularly useful with loads having uneven load weight distribution resulting in an off-set center of gravity. 360° contact with the load. and wrap the load to ensure full contact. Right Please note: One sling is depicted for illustrative purposes only. not pulled down during the lift.GENERAL INFO. pointing the opposite direction of the turn. 909. When the load is “wrapped” the sling Work Load Limit does not increase. Basket hitches should not be used to turn a load. Place sling eyes on top of the load. eye or at the base of the sling eye or fitting. if this action will not damage the load and maintain load control. The body is then passed under the load and through both eyes. the turning action will loosen the hitch. Use multiple slings to balance the load. Blocking should be used to protect the sling and facilitate removal. Always downgrade the choker Work Load Limit when the angle of choke is less than 120°. Ensure multiple slings do not cross. The Double Choker Hitch Work Load Limit is twice the regular Choker Hitch Work Load Limit. AND TRAINING Rigging and Hitch Information CHOKER HITCHES For a tighter choke hitch. never on the sling splice. ADJUSTABLE HITCH DOUBLE CHOKER HITCH smaller larger Right The Adjustable Hitch allows the sling user to adjust the length of the legs to raise the load level. choker. resulting in load slippage. If the sling is not rigged properly.lift-it. If applied improperly. The Work Load Limit for the Adjustable Hitch is identical to the “normal” Vertical Work Load Limit.indd 24 Wrong The Double Choker Hitch if applied properly will facilitate equalization of the loading on the sling legs over the lifting hardware. take a full wrap around the load before choking the sling. Choke on opposite sides of the load. Wrong Always use a choker hitch when turning a load. Ensure that multiple slings do not cross. tag. fittings. The choke hitch should always be pulled tight before the lift is made. Right Wrong The sling should be of sufficient length to ensure that the choke action is on the sling body. but load control does. The Adjustable Hitch works reasonably well on narrow web slings (1 and 2 in. which provides full.469-2251 2-24-PMS021. 24 4 www. A sling rigged in a choker hitch (not double wrapped) does not make full contact with the load. see page 20. • Broken or worn stitches in the load bearing splices.469-2251 25-198-PMS300. when it comes to using web slings. if the sling is damaged. All Sling Users Must be Trained and Knowledgeable 2a. use and inspection. Safety Standard for Slings (ASME B30. Inspect sling for damage regularly. environmental effects and rigging practices. all sling users Table 1. cautions to personnel. snags or embedded materials. remove it from service. 909. thickness and construction to prevent damage. Web sling removal from service criteria need to be aware of their responsibilities as outlined in all applicable standards and regulations. corrosion or other damage • Distortion. by is not as extensive as shown in the pictures in Table 2. you should perform a visual inspection of the entire sling and also feel along its entire length. sling. Sling use is only one part of a lifting system and it is your responsibility to consider all risk factors prior to using any rigging device or product. 2. All web sling users must be trained on the proper use of web slings.lift-it. it DOES NOT contain all the information you need to know about handling. cuts.5mm) cut (much smaller than the cut shown in Table 2) caused a sling to break under load at almost half its non-damaged capacity. conditions which cause doubt as to the strength of • Any the web sling. Slings should be protected from mechanical. All personnel should be alert to dangers of falling and/or uncontrolled loads. However. knowledge and care can result in severe INJURY or DEATH to you and others. charring or weld spatter on any part of the web • Melting. The American Society of Mechanical Engineers. to fitting(s). etc. www. Therefore. by possession of a recognized degree or certificate of it from service immediately even if the damage you feel or see professional standing in an applicable field. it is very important that web slings are regularly and properly inspected. training. or who. effects of the environment and rigging practices as covered" by Chapter 9-5. • Acid or alkali burns. inspection. under or near a load with the sling under tension. tears. Failure to do this may result in severe INJURY or DEATH due to sling failure and/or loss of load. All users must be trained in sling selection. 1." tested by the sling's manufacturer or other qualified person. lifting and manipulating materials and loads safely. has are removed from service must be destroyed and rendered successfully demonstrated the ability to solve or resolve completely unusable unless they can be repaired and proofproblems relating to the subject matter and work. ALWAYS protect slings in contact with edges. sling tension and the potential for snagging. excessive pitting.Web Sling Safety Information SYNTHETIC WEB SLING SAFETY BULLETIN Synthetic Web Sling Safety Bulletin WARNING This bulletin contains important safety information about the use of synthetic web slings. as some damage may be felt more than seen. • Signs of Ultraviolet (UV) light degradation. corners. Protect sling from damage. lack of skill. Do not stand on. Remember. • Holes. However if damage is • Ifpresent and red yarns are not exposed DO NOT USE the sling. and experience. OSHA Guidance on Safe Sling Use (29 CFR 1910. chemical and environmental damage. • Knots in any part of the sling webbing. For example.184) states that a 2b. provided.g. materials provided with each product. Slings Must Be Regularly and Properly Inspected Even seemingly "minor" damage to a web sling can significantly reduce its capacity to hold or lift objects and increases the chance that the sling will fail during use.com 3/1/12 3:53 PM . Slings that extensive knowledge. but note that they are relatively extreme examples provided for illustration purposes only. or abrasive surfaces with materials of sufficient strength. DO NOT USE IT. cautions to personnel.indd 25 25 4 shall be removed from service if ANY of the following are detected: • If sling identification tag is missing or not readable. You should look and feel for any of the types of conditions listed in Table 1. Table 2 shows examples of some of these types of damage. How to inspect slings To detect possible damage. You It is important that all sling users be knowledgeable about the should never ignore sling damage or attempt to perform safe and proper use and application of slings and be thoroughly temporary field repairs of damaged slings (e. one sling manufacturer has shown that a 3/8" (9.9) states: "Synthetic webbing sling users shall be trained in the selection. protrusions. What to do if you identify damage in a sling "qualified person" is one: If you identify ANY of these types of damage in a sling. Maintain and store slings properly. In addition. The entire web sling must be inspected regularly and it If you are unsure whether you are properly trained and knowledgeable. tie knots in the familiar with the manufacturer's recommendations and safety webbing.. exposed red core yarn. not exceed a sling’s rated capacity. or if you are unsure of what the standards and regulations require of you.). If you are not sure whether a sling is damaged. • Excessive abrasive wear or crushed webbing. Always 4 Do consider the effect of sling angle and tension on the sling’s rated capacity. remove "who. ask your employer for information and/or training—DO NOT use web slings until you are absolutely sure of what you are doing. lift-it. Types of damage you should look and feel for in web slings develops. • Exposing slings to damaging acids or alkalis. water absorption can decrease the strength of nylon web slings by as much as 10–15% (its strength returns when the sling dries completely). 3. Synthetic slings are affected by some chemicals ranging from little to total degradation. kinking or knotting the sling. but WSTDA WS-1 or ASME B30. See WSTDA WS-1 or ASME B30. can result in an accelerated deterioration of web slings. floor or over abrasive surfaces. • Exposing slings to sources of heat damage or weld spatter. 3a. consult the manufacturer. often evident by an accelerated abrasive damage to the surface yarn of the sling. abraded or cut as tension and compression between the sling. the periodic inspection should be performed by someone other than the individual(s) who most commonly performs the frequent inspection. General guidelines for the frequency of periodic inspections are: • Normal service—yearly • Severe service—monthly to quarterly • Special service—as recommended by a qualified person • Breakage or damage to yarn fibers. For example. • Shortening of the sling length. • Reduction in elasticity and strength of the sling material due to an exposure to sunlight. single ply slings will generally degrade more rapidly with this exposure than multiple ply slings. In addition. the nature of the work performed with the sling and experience gained during the inspection of other slings used in similar circumstances. Slings Must be Adequately Protected from Damage • "Tip loading" a sling on a hook instead of centering it in the base or "bowl" of the hook. In order to validate the frequent level of inspection. All web slings that are exposed to these conditions should be highly scrutinized during their inspections. • Uneven or disoriented surface yarn of the webbing. • Running/driving over slings with a vehicle or other equipment. Periodic inspections intervals must not exceed one year. Time. which can become particularly evident when web slings are exposed to outdoor conditions without being used or cyclically tensioned. Safeguard slings with sufficient protection Synthetic web slings can be damaged. • Stiffening of the web. • Twisting. it must be inspected by a designated person to help ensure that the correct web sling has been received and is undamaged and that the web sling meets applicable requirements for its intended use. severity of service conditions. Avoid environmental degradation Environmental factors such as an exposure to sunlight.Web Sling Safety Information 2c. Written records are not required for frequent inspections. 3c.9 require that a written record of the most recent periodic inspection be maintained. consult the manufacturer.com 3/1/12 3:53 PM . Severe and Special service conditions. 3b. dirt or gritty-type matter and cyclical changes in temperature and humidity. • Shortening or adjusting sling using methods not approved by the sling manufacturer or qualified person. Surfaces in contact with the sling do not have to be very Cuts or tears Snags Holes/punctures Melting or charring Weld spatter Acid/alkali burns Broken/worn stitches Crushed webbing Knots Embedded materials Exposed red core yarns Excessive abrasive wear No UV Degradation Faded From UV Exposure UV degradation 909. The rate of this deterioration will vary with the level of exposure to these conditions and with the thickness of the sling material. Avoid actions that cause damage to slings You should always avoid any action that causes the types of damage identified in the previous section of this Safety Bulletin.9 for more information about definitions of Normal. Frequent Inspection—The entire sling must be inspected before each shift or day in Normal service and before each use in Severe service applications.indd 26 26 4 www. Periodic Inspection—Every sling must be inspected "periodically" by a qualified and designated person. For specific applications. Web slings that are used outdoors regularly should generally be permanently removed from service within a period of 2 to 4 years. temperature and concentration factors affect the degradation. • Using slings or allowing exposure to temperatures above 194°F (90°C) or below -40°F (-40°C). How often to inspect slings SLINGS SYNTHETIC WEB SLING SAFETY BULLETIN Visible indications of such deterioration can include the following: A three-stage procedure is recommended to help ensure that web slings are inspected with appropriate frequency: • Fading of webbing color. often evident by a fuzzy appearance of the web. For specific applications. Initial Inspection—Whenever a sling is initially received. The frequency of periodic inspections is based on the sling's actual or expected frequency of use. shackles or other hardware that have edges or surfaces that could damage sling. • Pulling slings from under loads when the load is resting on the sling—place blocks under load if feasible. • Using hooks.469-2251 25-198-PMS300. the connection points and the load Table 2. including (but not limited to): • Dropping or dragging slings on the ground. users must perform several activities. The protection used should not be makeshift (i. 4b. web slings must ALWAYS be protected from being cut or damaged by corners. etc. lifting and manipulation of materials and loads requires consideration of a number of factors and issues. etc.. protection. The rated capacity for a basket hitch is twice that for a vertical hitch. Rated capacity is normally 80% of that for a vertical hitch. selecting and using cardboard. Personnel away from load and other dangers 27 4 Suitable wear protection Sling capacity is adequate for angle and tension Pre-lift plan and meeting Tag lines/spotter requirements www.g. some protection provides abrasion resistance. Issues and Factors to consider when handling. a trained. Select an appropriate sling/configuration Select a sling having suitable characteristics for the type. Choker Hitch Sling passes through one end around the load and the other end is placed on the hook. Always Use Slings Properly When lifting loads. as well as considering any other relevant factors not addressed herein (see Table 4).g.). the type of hitch (see Table 3) and the environment. base of the eye or fitting. electronic. 4. done in a non-consequence setting. including (but not limited to): Categories Environment Environmental temperature Object temperature Chemical conditions and exposure Ground stability Underground installations Load Weight Dimensions Center of Gravity (CG) Attachment point integrity Susceptibility to crushing/compression Loose parts that could fall from load Combination loads Damaging surfaces/edges Equipment/Lift Single/multiple cranes/hoists Maximum/planned operating radius Allowable load Ratio of lift to allowable load Clearance to surrounding facilities Power lines and other environmental hazards Clearance between boom and lift Emergency/contingency set down area Equipment inspection Ensure a clear load path Rigging Sling selection Load control Lift point (over the CG) Positive sling-to-load engagement Appropriate hitch (for CG and load control) Load is free to move and is not snagged Coordination of multiple slings Personnel Area clear of unnecessary personnel 909. size and weight of the load. There are a variety of types of ways to protect slings from such damage. under tension. Table 3. 4a. including (but not limited to) those discussed in the following subsections. A tagline should be used to prevent load rotation. but offers virtually no protection against cuts. qualified and knowledgeable user must determine the most appropriate method of rigging to help ensure a safe lift and control of the load. edges. Also. qualified and knowledgeable user must take into account the factors and issues addressed in this bulletin. Assess the load Determine the weight of the load and make sure it does not exceed the sling's rated capacity or the capacity of any of the components of the rigging system. A qualified person might also design and construct their own methods of protection so long as the sling is adequately protected from and/or kept off of the damaging edge surface. while the other end is attached directly to the load. A qualified person must carefully consider the most appropriate means to accomplish this goal.469-2251 25-198-PMS300. wear pads. Common types of sling hitches Hitch Comme nts Vertical Hitch One end is placed on the hook. Several "test" lifts.. A trained. fixtures. lifting and manipulating materials and loads Safe handling. fitting. Users must also determine the load's center of gravity (CG) to make sure the rigging system used will be able to retain and control the load once lifted. the choke point should always be on the sling body–not on the sling eye.. For instance.) specifically designed to protect slings from damage. may be necessary to determine the suitability of the protection device(s). Among the factors related specifically to web slings.lift-it. splice or tag. You should keep in mind that no protection is "cut proof" and you should always operate within the specified limits of the sling and its accessories (e.indd 27 Issues/ Factors to Consider Wind Weather Visibility Signals: Visual. The sling must be securely attached to the load and rigged in a manner to provide for load control to prevent slipping. sleeves. the protection device(s) and sling(s) need to be inspected for damage and suitability. protrusions or abrasive surfaces with protection sufficient for the intended purpose.com 3/1/12 3:54 PM . After each "test" lift. Regardless of the particular method chosen. Table 4. Basket Hitch The sling cradles the load while both ends are attached overhead. maintains its ability to securely lift the load while avoiding contact with damaging or abrasive surfaces under tension. more than one sling rigged in a basket hitch (or some other means) may be necessary to help ensure load control. etc. Regardless of the approach taken. hardware. A qualified person might select and use appropriate engineered protectors/softeners—commercially available products (e. work gloves or other such items based solely on convenience or availability). sliding and/or loss of the load.e. a qualified person must ensure that the protection method chosen is appropriate for the types of damage to which the slings will be exposed. Therefore. the goal is to ensure that the sling. edge wraps. audible. Load control is limited with only one sling rigged in a choker hitch. As with the choker hitch.Web Sling Safety Information SYNTHETIC WEB SLING SAFETY BULLETIN abrasive or have "razor" sharp edges in order to create the conditions for sling failure. body wraps. corner protectors. Web Sling Safety Information SLINGS SYNTHETIC WEB SLING SAFETY BULLETIN Table 5. etc.html) • Manufacturer’s catalog. keep slings clean and free of dirt.555 35 1. Use and Maintenance.000 Avoid accelerating or decelerating the load too quickly (i.lift-it. Slings should be stored in an area free from environmental or mechanical sources of damage. Reduction in rated capacity as a function of angle of choke Even if you account for all of the factors/issues discussed in this Safety Bulletin. Rigging handbooks. Rinse sling thoroughly and let it dry completely before placing the sling back into storage or use. the sling choker hitch capacity decreases.035 Similarly.221 4c. Do not use slings to pull on stuck or snagged objects and do not use slings for towing purposes. This principle applies in a number of conditions. Angle of Choke (degrees) When using slings. dry and dark location. 909.305 45 1.50 Actual Sling Capacity = Rated Capacity x Reduction Factor 6. • Formal training provided by manufacturers or other outside entities.742 30 2. multiply the sling capacity rating (for a choker hitch) by the appropriate reduction factor determined from Table 6. 70 1.469-2251 25-198-PMS300. ASME B30. © Web Sling and Tie Down Association. “shock loading”). personnel must be alert to the potential for the sling to become snagged during a lift. Synthetic Web Slings.lift-it. You and your employer can consult a number of sources of information to help ensure that you are properly trained and knowledgeable when using web slings. Do not machine wash slings. etc. A web sling should only be used for lifting loads. Therefore.004 80 1.104 60 1. all personnel must stand clear of lifted loads and never be under.184—Slings.469-2251 24/7/365 EMERGENCY ORDER NUMBER 909. info@lift-it. Angle “A” in degrees from horizontal Tension Multiplier 90 1. Never use a web sling to pull on objects in a snagged or constrained condition.indd 28 (http://www. This angle is very important and can have a dramatic effect on the rated capacity of the sling..com www.71 60 90 0. If you need more information about web slings and rigging practices or your responsibilities according to regulations and standards. To determine the actual sling capacity at a given angle of choke. Properly Store and Maintain Slings In order to prevent damage to slings when not in use.58 0 60 0. including (but not limited to): • • • • • OSHA Guidance on Safe Sling Use. Table 5 provides information about increased tension as a function of sling-to-load angle (assuming equally-loaded sling legs). on or near suspended loads.000 105 120 0.82 90 105 0. Inc. Make Sure All Personnel are Clear of Loads and Alert to Risks Multiply the load weight (per leg) by the tension factor to determine the increased tension on the sling leg(s) Table 6.com 3/1/12 3:54 PM . www.000 85 1.gov/dsg/guidance/slings/synth-web. talk to your employer. when the angle of choke is less than 120 degrees.e.osha.155 55 1. grime and foreign materials.414 40 1.9—Synthetic Webbing Slings: Selection. 5.524-9287 If slings are cleaned. Do not misuse the sling 50 1. chemical exposure. = or > < Angle of Choke Reduction Factor 120 180 1. Machine washing results in significant loss of sling strength.015 75 1.com TM Where to Find Additional Information This bulletin does not provide you with all the information you need to know in order to be considered trained and knowledgeable about rigging and lifting loads. heat sources.064 65 1. In addition. manual. Also. things can still go wrong.com 909.wstda. Sling angles of less than 30 degrees are not recommended. When the sling-to-load angle decreases. WSTDA-WSSB-1 2010 28 4 www. Increased sling tension as a function of sling-to-load angle Another important consideration is the sling-to-load angle—the angle formed between a horizontal line and the sling leg or body. bulletins. the load on each leg increases. including when one sling is used to lift at an angle and when a basket hitch or multi-legged bridle sling is used. such as: weld spatter. website. use only mild soap and water. OSHA 29 CFR 1910. splinters from grinding or machining. no part of the body should be placed between the sling and load or between the sling and lifting hook. you should store slings in a cool. but it does provide important information about the use of web slings within a rigging system. es muy importante que se inspeccionen las eslingas sintéticas con regularidad y en la forma apropiada. • • • • • • • • • • www. Además. o quien. y los hilos rojos no estén expuestos. Manera de inspeccionar las eslingas Todos los usuarios de eslingas deben ser capacitados en el uso apropiado de las mismas. hacer nudos en la malla. esquinas. si el daño está presente. No obstante. Si usted no está seguro si está correctamente capacitado o si tiene los conocimientos necesarios. Tabla 1. Costuras rotas o gastadas en los empalmes que sostienen la carga. dice lo siguiente: "Se capacitarán a los usuarios de eslingas de malla sintética en la selección. Criterios para el retiro del servicio de una eslinga sintética. Cualquier condición que haga dudar de la resistencia de la eslinga sintética. Derretimiento. ej. elevar y manipular con seguridad los materiales y cargas. Se debe inspeccionar las eslingas adecuadamente y con regularidad. así como en las precauciones al personal. Mantener y almacenar las eslingas correctamente. NO LA USE. NO UTILIZAR la eslinga. Inspeccione y toque la eslinga para la presencia de cualquier tipo de condiciones que figuran en la lista de la Tabla 1. En las recomendaciones de la Administración de Salud y Seguridad Ocupacional (OSHA) sobre el Uso Seguro de las Eslingas (29 CFR 1910. No obstante. un fabricante de eslingas ha mostrado que un corte de 3/8 de pulgada (9. Se debe proteger las eslingas de daños mecánicos.9). Hasta los daños aparentemente "menores" sufridos por una eslinga sintética pueden reducir significativamente su capacidad de sujetar o elevar los objetos. así como la aplicación de las eslingas. inspección. Por ejemplo. capacitación y experiencia.469-2251 25-198-PMS300. etc. se debe realizar una inspección tanto visual como táctil de toda la eslinga. la falta de habilidad.5mm) (mucho menor que el corte mostrado en la Tabla 2) hace que una eslinga se rompa bajo una carga de casi la mitad de su capacidad no dañada. debajo o cerca de una carga con la eslinga bajo tensión.184) se hace constar que una "persona calificada" es: "quien. ha demostrado con éxito la capacidad de resolver problemas relacionados con la temática y el trabajo". y es su responsabilidad considerar todos los factores de riesgo antes de emplear cualquier dispositivo o producto de aparejo. precauciones para el personal..Información de Seguridad de las Enslingas Sintéticas BOLETÍN DE SEGURIDAD DE LAS ESLINGAS SINTÉTICAS BOLETÍN DE SEGURIDAD DE LAS ESLINGAS SINTÉTICAS ADVERTENCIA Este boletín contiene importante información acerca del uso de las eslingas de malla sintética. los efectos ambientales y las prácticas de aparejo. Proteger la eslinga de daño. Por eso. conocimientos y cuidado puede resultar en graves LESIONES o MUERTE para usted y otras personas. hilo de núcleo rojo expuesto. • Quemaduras ácidas o alcalinas. La Sociedad Americana de Ingenieros Mecánicos en sus Normas de Seguridad para Eslingas (ASME B30. o si no está seguro de lo que le requieren las normas y reglamentos. SIEMPRE proteja las eslingas en contacto con bordes. y estar totalmente familiarizados con las recomendaciones del fabricante y los materiales de seguridad provistos con cada producto. Para detectar posibles daños. químicos y ambientales. Se debe destruir o imposibilitar por completo el uso posterior de cualquier eslinga retirada de servicio. Deformación. la tensión de eslinga y la posibilidad de enganchones. al igual que una construcción adecuada para prevenir el daño.). Inspeccionar la eslinga con regularidad para detectar daños. retírela de servicio inmediatamente. Si usted no está seguro si está dañada una eslinga. No pararse encima.lift-it.indd 29 29 4 Toda la eslinga sintética debe inspeccionarse con regularidad y hay que retirarla de servicio si se descubre CUALQUIERA de los siguientes problemas: Si falta el albarán o etiqueta de identificación de la eslinga o si es ilegible. Los seis puntos a continuación dan un resumen breve de importantes consideraciones de seguridad: Es necesario capacitar a todos los usuarios en la selección. La Tabla 2 presenta cualquier tipo de daño pero cabe notar que son ejemplos relativamente al extremo que damos únicamente a modo de ilustración 2b. por sus amplios conocimientos. pídale información y/o capacitación a su empleador— NO UTILICE las eslingas sintéticas hasta que esté absolutamente seguro de lo que está haciendo. ¿Qué es lo que se hace si se identifica algún daño en una eslinga? Si descubre CUALQUIERA de estos tipos de daño en una eslinga. en virtud de poseer un título reconocido o certificado de profesionalismo en un campo aplicable. a no ser que su fabricante u otra persona calificada pueda repararla y realizar las pruebas necesarias para poder usarla de nuevo. enganchones o materiales incrustados. El no hacer esto podría resultar en LESIONES graves o MUERTE debido a una falla de la eslinga o pérdida de la carga. Recuerde. salientes o superficies abrasivas con materiales dotados de suficiente resistencia y espesor. corrosión u otros daños a los accesorios.com 3/1/12 3:55 PM . Nunca permita que se pase por alto el daño de una eslinga ni tampoco trate de realizarle reparaciones provisionales en campo (p. todos los usuarios de eslingas necesitan estar conscientes de sus responsabilidades según su delineación en todas las normas y reglamentos aplicables. puesto que algunos daños se perciben más por el toque que por la vista. Agujeros. Se debe informar a todo el personal de posibles daños por caídas y/o el descontrol de cargas. roturas. Señales de deterioro por luz ultravioleta (UV). 2a. Nudos en cualquier parte de la malla de la eslinga. y así se aumenta la posibilidad de que la eslinga se caiga durante el uso. cuando se trata del uso de las eslingas sintéticas. El uso de la eslinga sólo es una parte de un sistema de elevación. 909. Si está provisto. 2. cortes. carbonización o salpicaduras de la soldadura en cualquier parte de la eslinga sintética. aún si el daño que usted siente o ve no es tan extensivo como el de las fotografías en la Tabla 2. Excesivo desgaste abrasivo o aplastamiento de la malla. retirar la eslinga de servicio. y si se descubren. el uso y la manera de inspeccionar la eslinga. efectos del medio ambiente y prácticas de aparejo según se cubran" en el Capítulo 9-5. NO CONTIENE toda la información que usted necesita para poder manejar. 4 No sobrepasar la capacidad nominal de la eslinga. picaduras en exceso. Siempre tenga en cuenta el efecto del ángulo de la eslinga y la tensión de la misma sobre su capacidad nominal. Es importante que todos los usuarios de eslingas tengan conocimientos sobre el uso seguro y correcto. se colocan bloques debajo de la carga. la persona designada debe inspeccionarla para poder asegurarse que se ha recibido la eslinga correcta y sin daños.com 3/1/12 3:55 PM . 3b. Inspección periódica — Una persona designada y calificada debe realizar la inspección "periódica" de cada eslinga. Para usos específicos.lift-it. No hace falta tener constancias de las inspecciones frecuentes.Información de Seguridad de las Enslingas Sintéticas 2c. temperatura y grado de concentración afectan el deterioro. Reducción en elasticidad y resistencia del material de la eslinga por haberse expuesto al sol. y que ésta satisface los requisitos aplicables para el uso destinado. Intensivo y Especial en el contexto de condiciones de servicio. cadenas u otros accesorios con bordes o superficies que podrían dañar la eslinga. a la suciedad o materia abrasiva y los cambios cíclicos de temperatura y humedad. la cual puede llegar a ser bastante evidente cuando las eslingas de malla se exponen al aire libre sin usarse ni someterse al ciclo de tensionado. cuando ésta descansa sobre la eslinga. Frecuencia de inspección de las eslingas Se recomienda un procedimiento de tres etapas para estar seguro de que se inspeccionan las eslingas con la debida frecuencia. Tabla 2. Inspección frecuente — Se debe inspeccionar toda la eslinga antes de cada turno o día de servicio normal y antes de usarse bajo condiciones de servicio intensivo. la absorción de agua puede reducir la resistencia de una eslinga de malla de nailon hasta entre el 10 y el 15% (la resistencia se recupera cuando la eslinga se seca por completo). comuníquese con el fabricante. Se debe proteger las eslingas adecuadamente de cualquier daño 3a. Para usos específicos. usándose métodos no aprobados por el fabricante de la eslinga o una persona calificada. Por regla general. de ser factible. Torcer. Hilo desparejo y desalineado en la superficie de la malla. Agujeros/perforaciones Malla aplastada Derretimiento o carbonizado Salpicaduras de soldadura Nudos Materiales incrustados No UV Degradation Faded From UV Exposure Degradación por luz ultravioleta 909. la intensidad de las condiciones de servicio. "Cargar sobre la punta" significa que el peso de la eslinga recae sobre la punta de enganche en lugar de centrarse sobre la base o "asiento" del gancho. Todas las eslingas sintéticas expuestas a estas condiciones deben examinarse a fondo durante la inspección. incluyendo (pero sin limitarse a): Eslingas que se caen al suelo o piso o que se arrastran sobre superficies rugosas.9 requieren que se guarde constancia de la inspección periódica más reciente. Inspección inicial — A la recepción inicial de una eslinga. Ver la norma WSTDA WS-1 o ASME B30. La tasa de este deterioro variará conforme al grado de exposición a estas condiciones y al espesor del material de la eslinga. la inspección periódica debe llevarse a cabo por una persona que no sea el individuo más comúnmente encargado de la inspección frecuente. Esté alerta a estos tipos de daños durante una inspección visual y táctil de las eslingas. A continuación se presentan las directrices generales sobre la frecuencia de las inspecciones periódicas: Servicio normal—anualmente Servicio bajo condiciones intensivas— mensual a trimestralmente Servicio especial—según las recomendaciones de una persona calificada Los intervalos de inspección periódica no deben de exceder un año. Evitar acciones capaces de dañar las eslingas Se debe evitar siempre acciones que produzcan las clases de daños identificados en la sección anterior de este Boletín de Seguridad. Fibras de hilo rotas o dañadas. éstas experimentan desde un leve deterioro hasta una degradación total. las eslingas sintéticas utilizadas al aire libre deben retirarse del servicio permanentemente dentro de un plazo de 2 a 4 años.469-2251 25-198-PMS300. Los factores de tiempo. a menudo evidente por la presencia de pelusa en la malla. Exponer las eslingas a fuentes de calor o salpicaduras de soldadura con el daño concomitante. Usar ganchos. a menudo evidente por una aceleración en el daño abrasivo al tejido superficial de la eslinga. Rigidez de la malla. Acortar o ajustar la eslinga. pero la norma WSTDA WS-1 o la ASME B30. Debido a algunos productos químicos que entran en contacto con las eslingas sintéticas. La frecuencia de las inspecciones periódicas se basa en la frecuencia de uso real o anticipada.indd 30 Hilo de núcleo rojo expuesto Excesivo desgaste abrasivo 30 4 www.9 para más información sobre definiciones de lo que significa Normal. comuníquese con el fabricante. Conducir o pasar por encima de las eslingas con un vehículo u otro equipo. la naturaleza del trabajo realizado con la eslinga y la experiencia obtenida durante la inspección de otras eslingas empleadas en circunstancias semejantes. Generalmente. Además. Longitud acortada de la eslinga. enredar o hacer nudos en la eslinga. pueden resultar en una aceleración del deterioro de las eslingas sintéticas. Para validar la frecuencia de inspección. Exponer las eslingas a ácidos o álcalis con el daño concomitante. tales como la exposición al sol. 3. las eslingas de una sola capa se deterioran más rápidamente que las de capas múltiples. Usar las eslingas o permitir que se usen cuando la temperatura sube por encima de 194°F (90°C) o baja por debajo de -40°F (-40°C). Estirar a la fuerza aquellas eslingas debajo de una carga. Evitar el deterioro ambiental Los factores ambientales. Cortes o roturas Enganchones Quemaduras ácidas o alcalinas Costuras rotas/gastadas SLINGS BOLETÍN DE SEGURIDAD DE LAS ESLINGAS SINTÉTICAS Indicaciones visuales del deterioro mencionado pueden comprender: Decoloración de la malla. Tabla 4. Tipos de enganches de eslinga comunes Enganche Enganche Vertical Enganche de Estrangulación 4. guantes industriales u otros artículos afines. Área de colocación de emergencia/contingencia. Hace falta inspeccionar el dispositivo(s) de protección y la eslinga(s) para detectar daños y determinar el grado de adecuación después de cada "prueba" de elevación.ej. desgastar o cortar al desarrollarse la tensión y compresión entre la eslinga. Aparejo Selección de eslinga Control de carga Centro de elevación (sobre el CG) Dinámica positiva eslinga-carga Coeficiente de fricción eslinga-carga. siguientes apartados.. incluyendo (pero sin limitarse a) aquellas tratadas en los siguientes apartados. Movimiento libre sin enganchones de la carga. Estabilidad estructural (dobladura/flexión). cantoneras. problemas y factores tratados en este boletín. y el otro extremo se coloca en el gancho. Entre los factores sea necesaria más de una eslinga aparejada especialmente pertinentes a las eslingas sintéticas. Siempre usar las eslingas correctamente Observaciones Se coloca un extremo en el gancho mientras que se une el otro extremo directamente a la carga. etc. la base del accesorio o albarán o etiqueta. incluyendo (pero sin limitarse a): Categorías Temperatura ambiente. incluyendo (pero sin limitarse a) aquellas tratadas en los medio) para asegurar el control de la carga. El control de la carga es un problema potencial con sólo una eslinga aparejada en un enganche de estrangulación. bordes. Inspección de equipo. los usuarios deben realizar varias actividades. al igual que cualesquier otros factores pertinentes no tratados en el presente (ver la Tabla 6). Asegurar un trayecto despejado para la carga. una persona calificada debe asegurar que el método de protección elegido sea apropiado para los tipos de daños a los que estarán expuestos las eslingas.com 3/1/12 3:55 PM . Condiciones y exposición químicas. Así también. Varias "pruebas" de elevación efectuadas en un entorno sin consecuencias adversas tal vez sean necesarias para determinar la idoneidad del dispositivo(s) de protección. Dar suficiente protección a las eslingas 4a. salientes y superficies abrasivas.lift-it. o sea. cierta protección brinda resistencia a la abrasión aunque virtualmente no brinda protección alguna contra cortes. La protección utilizada no debe ser precaria. Seleccionar una eslinga/configuración apropiada Seleccione una eslinga con las características apropiadas para el tipo. Cargas mixtas. Espacio entre la pluma y equipo elevador. Una persona calificada podría escoger y utilizar los protectores/suavizadores técnicos apropiados. levantamiento y manipulación seguros de los materiales y las cargas requieren que se considere un número de temas. el punto de estrangulación siempre debe estar en el cuerpo de la eslinga—no en los accesorios. Al igual que con el enganche de estrangulación. productos comercialmente disponibles (p. p. Independientemente del método elegido en particular. Temperatura objeto. Evaluar la carga Las eslingas sintéticas se pueden dañar.Información de Seguridad de las Enslingas Sintéticas BOLETÍN DE SEGURIDAD DE LAS ESLINGAS SINTÉTICAS 3c. levantamiento y manipulación seguros de los materiales y las cargas requieren que se considere un número de temas. Reunión y plan de elevación previos. problemas y enganche de cesta es dos veces la de un Cesta factores tratados en este boletín. Personal Área libre de personal innecesario Personal capacitado y calificado Señales: visuales. la meta es la de asegurar que la eslinga bajo tensión mantiene la capacidad de elevar la carga en forma segura mientras evita el contacto con las superficies dañinas o abrasivas bajo tensión. es posible que pertinentes no tratados en el presente (ver la Tabla 6). En las operaciones de levantar las cargas. la selección y utilización de cartón. www. Problemas y Factores a Tener en Cuenta Viento Clima Visibilidad Peso Dimensiones Centro de Gravedad (CG) 31 4 Estabilidad del suelo. únicamente debido a consideraciones de comodidad o disponibilidad. problemas y factores. los usuarios deben realizar en un enganche de cesta (o por algún otro varias actividades. problemas y factores El manejo.ej. mangas protectoras para eslingas planas y tubulares. un usuario calificado y capacitado con los conocimientos necesarios debe tomar en cuenta los temas. Tabla 3. un usuario calificado y capacitado con encima. los puntos de unión y la carga. Entre los factores especialmente pertinentes a las eslingas sintéticas. Un usuario calificado. La capacidad nominal para un de los conocimientos necesarios debe tomar en cuenta los temas. los cuales han sido diseñados específicamente para proteger las eslingas contra daños. las eslingas sintéticas SIEMPRE deben protegerse de cortes o daños provocados por esquinas. Independientemente del método elegido. Integridad del punto de unión. envolturas del cuerpo.). La capacidad nominal normalmente es del 80% de aquélla usada para un enganche vertical. Por eso. así como protegerse suficientemente para el propósito o uso destinado . Enganche apropiado (control de CG y carga).ej.). Por ejemplo. Se debe unir la eslinga con seguridad y cuidado a la carga y aparejarla de tal forma que permita controlar la carga y evitar el desplazamiento. Superficies/bordes dañinos. tamaño y peso de la carga. capacitado y con los conocimientos necesarios debe determinar el método más apropiado de aparejo para lograr el levantamiento seguro y el buen control de la carga. al igual que cualesquier otros factores enganche vertical. Ambiente Carga Equipo/ Elevación 909. Susceptibilidad a aplastamiento/compresión. La eslinga pasa por un extremo. Coordinación de eslingas múltiples. el tipo de enganche (ver la Tabla7) y el entorno. Se debe usar un cable de maniobra para prevenir la rotación de la carga.. 4b. audibles. Peligros a líneas de distribución y otros peligros ambientales. etc. Piezas sueltas que podrían caerse de la carga. etc. alrededor de la carga. piezas y protección. una persona calificada podría diseñar y construir sus propios métodos de protección siempre y cuando la eslinga esté protegida adecuadamente y alejada de la superficie del borde dañado. almohadillas contra el desgaste. Ropa de protección adecuada. por lo que se debe operar siempre dentro de los límites específicos de la eslinga y sus accesorios (p. Las superficies en contacto con la eslinga no necesitan ser muy abrasivas o tener bordes muy filosos (parecidos al filo de una navaja) para crear las condiciones de falla de la eslinga.469-2251 25-198-PMS300. Se debe tener en cuenta que no existe protección total "a prueba de cortes". Capacidad de eslinga adecuada para ángulo y tensión. Asimismo. Una persona calificada debe considerar con cuidado la manera más apropiada de lograr esta meta.indd 31 Un Número de Temas. electrónicas. Grúas/malacates Sencillos/múltiples Radio de operación máxima/planeada Carga permisible Relación de elevación a carga permisible Paso libre a edificios adyacentes. dispositivos. Instalaciones subterráneas. esquineras. Existe una variedad de maneras para proteger las eslingas de los daños mencionados. el deslizamiento y/o la pérdida de la carga. La eslinga actúa como cuna para la carga mientras que se sujetan ambos extremos por Enganche En las operaciones de levantar las cargas. Requisitos para vigilar el trayecto y la carga/ cable de maniobra. Personal alejado de la carga y otros daños. El manejo. el ángulo formado entre una línea horizontal y la pata o cuerpo de la eslinga. pero sí presenta información importante sobre el uso de las eslingas sintéticas dentro de un sistema de aparejo. Capacidad real de eslinga = Capacidad Nominal x Factor de Reducción Ángulo de Estrangulación Factor de Reducción PUNTO DE ESTRANGULACIÓN Cuando se usa la eslinga. En caso de necesitar más información sobre las eslingas redondas y las prácticas de aparejo o sus responsabilidades según los reglamentos y normativas. residuos y materiales extraños.221 50 1. El lavado a máquina resulta en una pérdida significativa de resistencia de la eslinga. tales como: salpicaduras de soldadura. Asegurar que todo el personal esté alejado de las cargas y alerta a los riesgos Tabla 6. Además. ÁNGULO DE ESTRANGULACIÓN CARGA 6.305 45 1.000 85 1.469-2251 25-198-PMS300. SLINGS BOLETÍN DE SEGURIDAD DE LAS ESLINGAS SINTÉTICAS Ángulo de Estrangulación (grados) o CARGA Se multiplica el peso de carga (por pata) por el factor de tensión para determinar el aumento de la tensión sobre la pata o patas de la eslinga. manual. usándose la Tabla 6 para determinarlo.104 60 1. etc.469-2251 Si hace falta limpiar las eslingas sintéticas. fuentes de calor. No someter la eslinga a usos indebidos Procure no acelerar ni desacelerar la carga con demasiada rapidez (acción denominada "carga de choque"). consulte con su empleador. info@lift-it. solamente utilice agua y un jabón suave. seco y oscuro. tampoco use las eslingas para el remolque. sitio web. incluyendo el uso de una eslinga para elevar en ángulo o con enganche de cesta o brida multipatas. Tabla 5.000 Así también.indd 32 32 4 SP www.555 35 1. Manera correcta de almacenar y mantener las eslingas Para prevenir el daño a las eslingas cuando no se usan.com 909. o sea. Las eslingas deben almacenarse en un área libre de fuentes de daño ambiental o mecánico. ni entre ésta y el gancho de elevar. etc. Para determinar la capacidad real de la eslinga a un ángulo dado de estrangulación. hay que almacenarlas en un lugar fresco. Una disminución en el ángulo eslinga-carga produce un aumento de carga sobre cada pata. multiplicar la capacidad nominal de la eslinga (para vuelta de estrangulación) por el factor de reducción apropiado. Aumento en la tensión de eslinga en función del ángulo eslinga-carga Ángulo “A” en grados desde horizontal Multiplicador de tensión 90 1.004 80 1. No se recomiendan ángulos de eslinga menores de 30 grados.Información de Seguridad de las Enslingas Sintéticas Otra consideración importante es el ángulo eslinga-carga. Este principio se aplica a numerosas condiciones.com www. se reduce la capacidad de resistencia de la vuelta estranguladora. No lave las eslingas a máquina. exposiciones a productos químicos.184-Eslingas 909. Usted y su empleador pueden consultar un número de fuentes informativas para poder asegurarse que usted ha sido correctamente capacitado y con los conocimientos necesarios para el uso de las eslingas sintéticas. 24/7/365 EMERGENCIA NÚMERO DE ORDEN 909.com 3/1/12 3:56 PM .9 – Eslingas de malla sintética: selección. No use las eslingas para arrastrar ni para estirar objetos trabados o enganchados. uso y mantenimiento OSHA 29 CFR 1910.gov/dsg/guidance/slings/synthweb. mantenga las eslingas limpias sin suciedad. cuando el ángulo de estrangulación es menor de 120 grados.414 40 1. La Tabla 5 brinda información acerca de un aumento de tensión como función del ángulo eslinga-carga (se supone una distribución uniforme de la carga sobre cada pata de la eslinga). Reducción en la capacidad nominal en función del ángulo de estrangulación Aun teniendo en cuenta todos los factores. Así también. temas o situaciones que se han tratado en este Boletín de Seguridad. Por eso. el personal deber estar alerta a la posibilidad de que la eslinga se enganche durante la elevación. boletines. Una eslinga sintética sólo debe usarse para levantar cargas.064 65 1.lift-it.035 70 1. ninguna parte del cuerpo humano debe colocarse entre la carga y la eslinga.html) Catálogo. Este ángulo es muy importante y puede tener un efecto dramático sobre la capacidad nominal de la eslinga. debajo o cerca de ellas.155 55 1. del fabricante Capacitación formal provista por los fabricantes u otras entidades externas WSTDA-WSSB-1 2010 ASME B30.524-9287 TM Dónde Encontrar Información Adicional Este boletín no pretende darle toda la información que necesita saber para considerarse capacitado y con los conocimientos necesarios sobre aparejos y elevación de cargas.742 30 2.lift-it. 5. Nunca utilice una eslinga sintética para estirar o arrastrar los objetos enganchados o de otra manera difíciles de levantar. 4c. incluyendo (pero sin limitarse a): WSTDA-WS-1 – Especificación normalizada recomendada para eslingas de malla sintética de poliéster Manuales de aparejos Recomendaciones de OSHA sobre el uso seguro de las eslingas (http://www. todo el personal debe alejarse de las cargas levantadas y nunca ponerse encima. pueden presentarse problemas. Enjuague bien la eslinga y déjela secar completamente antes de usarla o almacenarla de nuevo.osha.015 75 1. astillas de esmerilado o fresado. Sling Service for definitions of Normal. FREQUENT INSPECTION The Web Sling and Tie Down Association defines the frequent level of inspection as one that is done by the user or other designated person daily or before each shift in NORMAL service conditions. Irrespective of the recordkeeping requirements that govern your actions. Never ignore sling damage or attempt to perform temporary field repairs of damaged slings.469-2251 25-198-PMS300. It is also important that all inspections must be done by trained and qualified personnel.. load and environment. Written inspection records are not required for frequent inspections. death and property damage. “Before any new or repaired sling is placed in service. Periodic Inspection intervals shall not exceed one year intervals. Qualified Person: A person. severity of the service conditions. 909. remove it from service immediately. training and experience. continue the practice.indd 33 33 4 www. You should look and feel for any of the types of conditions listed in the Removal from Service Criteria. Inspection Tag or RFID chipped for easy. “before each day or shift. or who. If you identify ANY of these types of damage in a sling. by extensive knowledge.).As recommended by a Qualified Person Written records of the most recent periodic inspection shall be maintained. It is important that you employ a three stage. it shall be inspected by a qualified person to ensure that the correct sling is being used. see page 34. If written records for individual slings are to be maintained. sling identification number is not required. SLING INSPECTION SYSTEMS INITIAL INSPECTION PERIODIC INSPECTION The Web Sling and Tie Down Association defines the initial level of inspection as. All slings must be inspected “periodically” by designated personnel at regular intervals. If your employer or industry requires recording the condition of individual slings. The products must also be verified to be correct. When SEVERE service conditions exist. you should perform a visual inspection of the entire sling and also feel along its entire length. The American Society of Mechanical Engineers also states in the initial inspection that. The important point to realize is the ASME recordkeeping requirement mandates that the event be documented not the condition of individual slings.e. See page 476. ASME stipulates the following time interval guidelines for Periodic Inspections: Normal Service .Yearly Severe Service . Never assume that slings have been inspected by others.Monthly to Quarterly Special Service . Recordkeeping at the initial level of inspection is not required. altered. The entire sling shall be thoroughly examined and removed from service if damage is detected. the sling and all fastenings and attachments shall be inspected for damage and defects by a competent person designated by the employer”. even if the damage you see or feel is not as extensive as shown on page 35. Designated Person: Selected or assigned by the employer or employer’s representative as being competent to perform specific duties. but note that they are relatively extreme examples provided for illustration purposes only. OSHA and ASME stipulate that. as some damage may be felt more than seen. Reference to a unique. Any condition that may result in a hazard shall cause the sling to be removed from service. It is very important that slings are regularly and properly inspected. OSHA and ASME provide minimum guidelines. Slings that are removed from service must be destroyed and rendered completely unusable unless they can be repaired and proof tested by the manufacturer. etc. modified or repaired slings shall be inspected by a designated person to verify compliance to all applicable standards”. who by possession of a recognized degree or certificate of professional standing in an applicable field. Lift-It® Slings can be equipped with an Inspection Loop™. has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work.com 3/1/12 3:56 PM . tie knots in the sling. (i. Without printed product specifications this comparison cannot be accomplished. Recommendations to prevent damage must be evaluated to improve the service life of the replacement slings. the nature of the work being performed and experience gained during the inspection of slings used in similar circumstances. as ordered and they comply with the manufacturer’s specifications. The interval is based upon: the frequency of use. the documentation should be initiated at this level of inspection. To detect possible damage. WSTDA. Severe and Special Service. A qualified person must also determine that the sling is proper for the intended use.lift-it. the Periodic Inspection should be done by someone other than the individual(s) who performs the Frequent Inspection. all new. Page 35 depicts examples of some of the types of damage. level of inspection to ensure that slings are inspected with the appropriate frequency. as well as to determine that the sling meets the applicable requirements”. take the time to inspect the sling before you use it. the sling must be inspected before each use. If you are not sure whether or not a sling is damaged. If you are unsure if the daily or pre-shift inspection has been done. The initial level of inspection is done upon receipt to ensure that no damage has occurred during transit. DO NOT USE IT. In order to validate the Frequent Level of Inspection. hitch.Web Sling Inspection A specific procedure for sling inspection is the best safeguard against injury. visual verification of Periodic Inspections (See pages 54 and 55). it is important that slings inspected “periodically” be identified or tracked to validate that the Periodic Inspection occurred. “prior to use. SLINGS DOL-OSHA 29 CFR 1910. • Broken or worn stitches in the load bearing splices. However. • Melting.lift-it.10 k) For other applicable hardware. removal criteria as stated in ASME B30. f) Excessive abrasive wear. corroded.184 AND GUIDANCE ON SAFE SLING USE ASME B30. tears. • Excessive abrasive wear or crushed webbing. • Signs of ultraviolet (UV) light degradation. • If provided. • Distortion. remove the sling or attachment from service immediately. • Discoloration and brittle or stiff areas on any part of the sling. excessive pitting. • Acid or alkali burns. removal criteria as stated in ASME B30. tears. bent. • Acid or caustic burns. twisted. • Excessive abrasive wear.com 3/1/12 3:56 PM . h) Discoloration and brittle or stiff areas on any part of the sling. • Any conditions that cause doubt as to the strength of the web sling. charring or weld spatter on any part of the web sling. which may mean chemical or ultraviolet/ sunlight damage.469-2251 25-198-PMS300.7. cracked. • Holes.9 REMOVAL FROM SERVICE CRITERIA a) Missing or illegible sling identification. gouged or broken fittings. • Broken or worn stitching in load bearing splices.26 l) Other conditions. gouged or broken. exposed red core yarn. • Other conditions that cause doubt as to continued use of a sling. • Holes. that cause doubt as to the continued use of the sling. cuts or snags. Items to look for include: • Missing or illegible sling identification. Section 9-5. if more than one b) Acid or caustic burns. cuts or snags. twisted. g) Knots in any part of the sling. 909. • Knots in any part of the sling. cuts. corrosion or other damage to fitting(s).1 requires that each sling be marked to show the following: 1) name or trademark of the manufacturer 2) manufacturer’s code or stock number 3) rated load for at least one hitch type and the angle upon which it is based 4) type of synthetic material 5) number of legs.Web Slings Make a thorough inspection of slings and attachments. corroded.indd 34 34 4 www. tears. bent. • Melting or charring of any part of the sling. j) For hooks. snags or embedded materials. d) Holes. WEB SLING AND TIE DOWN ASSOCIATION REMOVAL FROM SERVICE CRITERIA SYNTHETIC WEB SLING SAFETY BULLETIN (WSSB-1) 2010 The entire web sling must be inspected regularly and it shall be removed from service if ANY of the following are detected: • If sling identification tag is missing or not readable. Where any such damage or deterioration is present.Removal from Service Criteria. DO NOT USE the sling. • Pitted. i) Fittings that are pitted. if damage is present and red yarns are not exposed. c) Melting or charring of any part of the sling. including visible damage. e) Broken or worn stitching in the load bearing splices. • Knots in any part of the sling webbing. cracked. lift-it.com 3/1/12 3:56 PM .indd 35 SNAG 35 4 BAD DAMAGED HARDWARE www.Web Sling Inspection If any damage such as the following is visible. Photos depict examples of sling damage. the sling shall be removed from service immediately. ACID OR CAUSTIC BURNS CUT EDGE CUT MELTING OR CHARRING ABRASIONS PUNCTURE WELD SPATTER BROKEN OR WORN STITCHES DAMAGED EYE EMBEDDED MATERIALS TENSILE BREAK MISSING OR ILLEGIBLE TAG RED CORE YARN KNOT No UV Degradation Faded From UV Exposure UV DEGRADATION GOOD CRUSHED WEBBING 323-582-6076 25-198-PMS300. but note they are extreme examples provided for illustration purposes only. Mr. Welk. Welk passed peacefully on May 17. Generally if repair activity exceeds 50% of replacement cost. He would become one of the wealthiest men in Hollywood and attributed his success to the opportunities made available to him by the country he so loved. Welk was born to immigrant parents in a sod farm house near Strasburg. As you look down upon us from heaven. Each item is thoroughly inspected per OSHA and/or ASME criteria. BEFORE REPAIR INSPECTION PROOF TESTING REPAIRS COMPLETE Mr. the condition and approval or removal from service criteria will be provided. Eventually his band would play to an audience of over 30 million on his weekly television broadcast where adults were entertained and children remained silent. Mr. This report will also include recommendations to enhance sling service life and employee safety. Fern Renner Welk and his children by his side. During the early years he played at barn dances and weddings. If you wish to repair or replace damaged slings. 909. a love for music and a desire to share it with others. He left the farm when he was 21 to pursue his dream.com 3/1/12 3:57 PM . Items that pass visual inspection will be proof tested and certified. hoists. North Dakota on March 11. we will provide replacement costs. below the hook lifting equipment and tie downs.lift-it. 1903. SLINGS SLING INSPECTION MADE EASY A detailed report identifying each item. Lawrence Welk is the TRUE American Idol. his determination to succeed and his faith in the Dear Lord. 1992 with his loving wife. thank you for the countless hours of entertainment pleasure you provided for millions of us over the years and for the example and quest for excellence you inspired in me. industry standards and/or manufacturer recommendation. the repair activity is not recommended.indd 36 36 4 www.Repair • Testing • Certification Factory trained professionals inspect all types of slings.469-2251 25-198-PMS300. consider using a sponge. Web and roundslings are severely damaged by machine washing. The time. Recycle sling hardware. Care • Storage • Cleaning In order to prevent damage to slings. per OSHA.lift-it. which can degrade synthetic fibers. energy and resources necessary to be a sling launderer may exceed the purchase price of replacement slings. When we receive your components they are degreased and carefully inspected. • FREE OF ENVIRONMENTAL/MECHANICAL DAMAGE Ventilated and not exposed to heat and chemical exposure. A clean sling. Repaired items are proof tested to twice the assigned Work Load Limit. • DRY To prevent the growth of mold and mildew. Our test machines are annually certified to ASTM E4 standards and produce a machine generated record for each test. An additional tag is attached to all repaired items identifying Lift-It® as the repair agent. After cleaning. awning.Repair • Testing • Certification Sling repair must be economically feasible and must be done by a recognized sling manufacturer. Beware of “testing” facilities that do not have the capabilities to offer a “machine” generated certificate of test. per OSHA requirement. sunlight. • DARK To prevent the deleterious effects of prolonged exposure to sources of ultraviolet light.com 3/1/12 3:57 PM . Our 600.469-2251 25-198-PMS300.000 pound test machine will accommodate sling lengths up to 120 ft. strengths and Work Load Limits for any of our products. Test certificates are enclosed with the return shipment and your inspection records must be updated to reflect the repair activity. rinse slings thoroughly and allow them to completely dry before returning them to storage. when not in use. Tent. 909. Consider replacing slings. Slings should also be kept clean and free of dirt. Hard bristle brushes damage webbing. A nominal charge will be applied if proof testing and certification are required. instead of attempting to clean. ASME and WSTDA requirements. Mild soap and water can be used for this purpose. resulting in a serious loss of sling strength. Soaking slings in mild soap and water for short periods of time is non-damaging. free of dirt and grime is easier to inspect for damage. the hardware components are reusable and utilization will substantially reduce overall sling costs. Lift-It® will provide certification of conformance for materials. Make sure the location is: • COOL To prevent damage resulting from exposure to excessive temperatures. weld spatter or grit and splinters from grinding or machining. Steam cleaning at temperatures in excess of 194ºF/90ºC can damage the sling.indd 37 37 4 www. shoe and saddle shops are not equipped to test repaired products and generally are not proficient in sling fabrication or repair techniques. Generally. grime and foreign material. Power or pressure washing can force residue inside web and yarn fibers. The foreign material can cause internal yarn and fiber damage. we recommend that they be stored in a proper location. Consult the sling manufacturer before purchase to evaluate chemical compatibility between slings. For example. (See page 18 for additional information). Factors which play a part in the degree of strength loss are length of exposure.Physical Factors Affecting Sling Strength SLINGS ENVIRONMENTAL CONSIDERATIONS Avoid environmental degradation. elevation and geographic location also affect the degree of degradation. Polyester and High Performance Fiber strength is unaffected by moisture absorption. often evident by a fuzzy appearance of the web. free of mechanical and environmental damage. TEMPERATURE Conventional synthetic products should never be used at temperatures above 194˚F/90˚C or below -40˚F/-40˚C. The storage location should be ventilated and not exposed to heat sources. MOISTURE ABSORPTION: When nylon products are “wet” there is an approximate strength loss of 15%. as determined by a qualified person should be proof tested to two times the Work Load Limit.indd 38 38 4 www. sling construction and design. Nylon sling strength returns when the sling dries completely. grit. often evident by an appearance of an accelerated. their components and the environment. single ply slings will generally degrade more rapidly with this exposure than multiple ply slings. semi-annually or more frequently depending on the severity of exposure. store slings in a cool. weld spatter. The rate of the deterioration will vary with the level of exposure to these conditions and with the thickness of the sling material. which can become particularly evident when web slings are exposed to outdoor conditions without being used or cyclically tensioned.com 3/1/12 3:57 PM . • Stiffening of the web. This loss of strength is documented in the 1988 DuPont Technical Information Multifiber Bulletin X272. Slings used in environments where they are subject to continuous exposure to ultraviolet light or excessive environmental degradation. • Uneven or distorted surface yarn of the webbing. Visible indications of such deterioration can include the following: • Fading of webbing color. ULTRAVIOLET (UV) LIGHT Continuous exposure to sources of ultraviolet light affect the strength of synthetic products in varying degrees from slight to total degradation. • Reduction in elasticity and stretch of the sling material due to exposure to sunlight. dry. Web slings that are used outdoors regularly should generally be permanently removed from service within a period of 2 to 4 years. page 6. • Breakage or damage to yarn fibers. Other environmental factors such as: weather conditions. foreign materials and splinters from grinding or machining. Temperature exposure outside the acceptable range must be considered and evaluated by a qualified person. chemical exposure. All slings that are exposed to environmental degradation should be highly scrutinized during their inspections. Before slings are used. dark location. the chemical compatibility between the sling and the environment must be considered. CHEMICAL Chemically active environments can affect the strength of synthetic products in varying degrees ranging from moderate to total degradation. 909. abrasive damage to the surface yarn of the sling. Aluminum fittings should never be exposed to chlorine environments or cleaned with chlorine based cleaning solutions. • Shortening of the sling length. STORAGE When not in use. dirt or gritty type matter and cyclical changes in temperature and humidity can result in an accelerated deterioration of synthetic slings.469-2251 25-198-PMS300.lift-it. Environmental factors such as an exposure to sunlight. grime. Ensure that both paths are loaded equally for Twin-Path® slings. • Select the sling having the most suitable characteristics for the type of load. hitch and environment. Two slings should be used to balance the load. • A sling rigged in a choke hitch (not double wrapped) does not make full contact with the load. One sling used in a choker hitch may result in a situation where an unbalanced load could lead to an accident. • Slings shall not be shortened. the diameter and curvature that the sling contacts. type of hitch. creating an unbalanced condition. the hook and the choke action of the sling.indd 39 39 4 www. angle of loading. • Slings that are damaged or defective shall not be used. on the load carrying splice or the sling tag. design factor. lengthened. • The sling shall be securely attached to the load and rigged in a manner to provide load control. • Sling users must determine the load’s Center of Gravity (CG) to ensure the rigging system will be able to retain and control the load once lifted.com 3/1/12 3:57 PM . Use multiple slings and wrap the load. For non-symmetrical loads an analysis by a qualified person shall be done to avoid overloading any part of the sling system.lift-it. Consideration should be given to the sling-to-load angle which affects sling Work Load Limits. at the base of the fitting or eye. testing conditions. • The sling tag should be maintained and kept legible during the life cycle of the sling by the sling user. Do not place the load carrying splice in a connection point to the load or in the lifting mechanism. Slings used in any hitch shall have the load balanced to prevent slippage. • Slings shall be permanently marked. Slings removed from service that are not capable of repair should be destroyed and rendered completely unfit for any future use. • Determine the weight of the load and make sure it does not exceed the sling’s Work Load Limit or the capacity of any component in the rigging system. The choke action should not occur on: the fitting or eye. inspection. Instantaneous changes (rapid acceleration or sudden stopping) constitute hazardous shock loading and WORK LOAD LIMITS AS STATED. • Keep the sling tags and labels away from the load.Physical Factors Affecting Sling Strength MECHANICAL CONSIDERATIONS • Synthetic sling users shall be trained in the selection. DO NOT APPLY. • Avoid side loading or edge loading slings. The replacement of the sling tag is considered a repair. 909. • Work Load Limits for basket hitches and multi-leg bridle slings are based upon symmetrical loading of the individual legs. The sling must be rigged to prevent slipping and sliding across load edges. cautions to personnel. • Basket hitches used at angles less than 60 degrees can cause slings to slip under tension. Do not allow the slings to cross over each other. • Work Load Limits are based upon: material strength. • The sling manufacturer shall complete and install the sling tag. • Slings used in a choker hitch shall not be forced to tighten around the load by pounding with hammers or other objects. effects of the environment and rigging practices. except as recommended and approved by a qualified person. but will not require proof testing and certification. Slings with missing tags or illegible tag information shall not be used. • Twisting and kinking the sling legs shall be avoided. • Horizontal angles less than 30 degrees shall not be used. Choker hitches are the least efficient way to use a sling based on Work Load Limit. tied in knots or joined by knotting. when practical to ensure full contact. which will never be duplicated during actual usage. Methods not approved by the manufacture or qualified person shall not be used. Sling legs should contain or support the load from the sides above the Center of Gravity when using a basket hitch so the load will not tilt when lifted. • Slings shall not be loaded in excess of the Work Load Limits. and destruction testing done in laboratory controlled. Work Load Limits are also based on a moderately dynamic lifting or pulling operation. • Slings used in a choker hitch must be of adequate length for the choke action to occur on the sling body.469-2251 25-198-PMS300. indd 40 40 4 www. i..e. the recoil caused by any sudden release of a lifting constraint could result in a dangerous projection of the load. slings with larger Work Load Limits or by selecting a low elongation. size and diameter to prevent damage to the sling. 909. • Synthetic slings shall not be constricted or bunched between the ears of a clevis or shackle or in a hook. • The opening in fittings should be of the proper shape and size to ensure that the fitting will seat properly in the lifting hook or other points of attachment. • Portions of the human body shall not be placed between the sling and load or between the sling and lifting hook. • Loads resting on the sling could damage the sling. • Avoid contacting and bending sling fittings over or across load edges. • Synthetic products stretch when the load is applied. A load picked up too fast can develop a stretch/friction/surface heat that can surpass the melting temperature of the sling. • Synthetic slings shall not be used as bridles on suspended personnel platforms.469-2251 25-198-PMS300. • All loads applied to the lifting hook should be centered in the “bowl” of the hook to prevent point or tip loading. proper shape. in doing so. edges. • Synthetic lifting slings shall not be used for fall prevention applications. • Do not accelerate or decelerate the load too fast. See pages 43-52 for additional information. shackles and other fittings must be free of damaging edges that could harm the sling. • Sling hardware or any object in the sling eye should not be wider than one-third the length of the sling eye. High Performance Fiber. Synthetic slings are designed to stretch. Twin-Path® Extra Sling. fitting. Even if you take in account all factors and issues. The “sling-fitting” relationship must be proper to ensure that slings will “seat” properly and. with or without load. protrusions or abrasive surfaces by materials of sufficient strength. attachment. The overall assembly capacity shall be established as the lowest strength of any assembly component (sling. • All hooks. Stretching can be reduced by using polyester slings. Sling protection may not prevent cutting or other forms of sling damage. • Slings shall not be pulled from under loads when the load is resting on the sling. The “G” force on a dropped load could surpass the ultimate strength of the sling. • Personnel should stand clear of the load and shall not ride the load. it is recommended that they be used (rigged) in the bow of the shackle.com 3/1/12 3:57 PM . • Do not run over slings with trucks or other equipment. When synthetic slings are used with a shackle. • Do not drop objects on slings or slings equipped with metal fittings. • Slings shall not be dragged on the ground or floor. • Synthetic slings should never be used to pull an object in a snagged or constrained condition or used for towing. unless the sling is protected. etc.Physical Factors Affecting Sling Strength SLINGS MECHANICAL CONSIDERATIONS • Slings shall always be protected from being cut or damaged by corners. • Personnel should never be under. • During the lift. place blocks under the load to allow for removal of the sling. • Fittings used in any sling system must be compatible.lift-it. personnel shall be alert for possible snagging.) • The use of improper fittings and/or materials may result in severe personal injury or death. thickness and construction. things can still go wrong. Placing synthetic slings on the pin should be avoided. If feasible. or drawn over abrasive surfaces. next to or on a suspended load. derive the greatest Work Load Limit. Other factors that affect shrinkage are humidity. 99% retention when exposed to: acetic acid.lift-it. Polyester. Nylon products have good resistance to aldehydes. ketones. temperature and usage. 10% detergent solution. sunlight and toluene. Stretch at Work Load Limit is approximately 1%. Nylon webbing will shrink more than polyester webbing. Nomex®. halogenated hydrocarbons. hot solutions of zinc chloride in methanol. Aramid. K-SPEC® K-Spec® is a combination of High Molecular Polyethylene and Aramid fibers. Stretch at Work Load Limit is approximately 1% and the acceptable temperature exposure range is -40˚F/-40˚C to a maximum of 180˚F/82˚C.indd 41 41 4 www. Oxidizing agents and bleaching treatments ordinarily used by the textile industry do not degrade polyester fiber. but is disintegrated by concentrated sulfuric acid (95%) at room temperature and exposure to alkalis. such as. 95% retention when exposed to Portland cement. ethylene chlorohydrins and ethylene glycol. All webbing will become shorter. as a result of the weave configuration. gasoline. with no use. rot and mildew. hydrochloric and sulfuric in 10% concentrations at room temperature cause significant strength loss in 10 hours.469-2251 25-198-PMS300. Polyester products also have some resistance to most aqueous solutions at room temperature. Stretch at Work Load Limit is approximately 5-7% for slings with treated webbing. halogenated hydrocarbons. dry cleaning solvents. ketones.com 3/1/12 3:57 PM . PERFORMANCE CHARACTERISTICS OF SYNTHETIC FIBERS NYLON Nylon is popular and general purpose synthetic fiber which is unaffected by common grease and oil. over time. 97% retention when exposed to sodium hydroxide 5m. benzyl alcohol at the boil. hot solutions of calcium chloride in: glacial acetic acid. The acceptable temperature exposure range is -40˚F/-40˚C to a maximum of 194˚F/90˚C. phenolic compounds and calcium chloride in methanol at room temperature. K-Spec® has a 100% strength retention when exposed to: age. particularly at elevated temperatures and/or high concentrations. kerosene and sea water. Polyester does not lose strength as a result of moisture absorption. and 88% retention when exposed to Clorox® bleach and nitric acid. ARAMID Aramid fibers are resistant to most weak acids. POLYESTER Polyester is not significantly affected by most compounds of the following classes: alcohols. alkalis. Dense weave webbing shrinks less than loose weave webbing. hydrocarbons. Ultra High Molecular Polyethylene (UHMwPE) and K-Spec® fibers are ideal materials for synthetic slings because they offer varying degrees of resistance and compatibility with different chemical agents. 10% hypophosphite solution.Chemical Considerations It is important to select slings and components possessing proper chemical characteristics. hydraulic fluid. alcohols. ketones. The acceptable temperature exposure range is -40˚F/-40˚C to a maximum of 194˚F/90˚C. while degradation ranging from none to moderate occurs with exposure to certain alkalis. 909. Nylon webbing placed on a table. soaps and synthetic detergents or water (including sea water). Nylon is not significantly affected by compounds of the following classes: alcohols. Polyester also has good to excellent resistance to aqueous solutions of most weak acids at the boil and to most acids at room temperature. hydrochloric acid 1m. making them compatible with their environment. Solvents for nylon include: concentrated formic acid. Nylon. oils and dry cleaning solvents. dry cleaning solvents. but are degraded by the same solution at the boil. 98% retention when exposed to: 25% ammonium hydroxide. soaps and synthetic detergents or water (including sea water). Dilute acids. Strong acids. ethers and some alkalis. bases and sodium hypo-chlorite bleach attack Aramid fibers. Stretch at Work Load Limit is approximately 8-10% for slings with treated webbing. Exposure can result in degradation from none to total. and 40% phosphoric acid. Nylon products lose 15% of their Work Load Limit when wet. K-Spec® core yarn strength retention is based on test results of components at 150°F/65°C (or less) for 6 months. Nylon products are not suitable for use with acids and bleaching agents. will shrink up to 5% in length after six months. Poly-Arylate (Liquid Crystal). hydrocarbons. 5 Elongation at Break % 15 .29 35 . Stretch at Work Load Limit is approximately 1% and maximum temperature exposure is 140˚F/60˚C. alcohols.8 3.0 .158 123 . Its acid resistance is superior to nylon.176 90 424 .38 1.10. 909.6 3. Nomex® shows good resistance to alkalis at room temperature.28 12 .11 Bulk Strength 1.0 28 26 .0 .41 . ALWAYS FOLLOW RECOMMENDATIONS ON SLING WARNING TAG.0 0. resins and refrigerants at high temperatures and is resistant to fluorine compounds in concentrations usually encountered in stack gases from metallurgical and rock-processing operations. but is not as good as polyester.8 Good Good Excellent Excellent Excellent Excellent Good Good Good Excellent Excellent Excellent Fair Fair Good <90% Excellent Excellent Dilute: Excellent Good Good Excellent Excellent Excellent Concentrated: Excellent Fair Good <30% Excellent Excellent Chemical Resistance Solvents Acids Dilute: Concentrated: Alkalis Temperature Tolerance Melt Point 425°F 490°F 900°F 625°F 300°F 320°F 218°C 254°C 482°C 330°C 149°C 160°C Please Note: Conventional Synthetics are not to be used at temperatures exceeding 194°(F)/90°(C).5 .lift-it. but is degraded by strong alkalis at higher temperatures.525 397 . The resistance of Nomex® to oxides of sulfur at temperatures above the acid dew point is superior to polyester.18 4.6.5 2 <0.9 2.5 .8 Moisture Regain % 4. Nomex® is compatible with fluorine-containing elastomers.38 1. concentrated sulfuric acid may condense on the fiber and cause a progressive loss of strength.97 1.8 2.3.indd 42 42 4 www.com 3/1/12 3:57 PM .7 2.40 35 Tensile 000 psi Fiber Properties 113 . NOMEX® Nomex® is resistant to most ketones.14 1.546 472.8 3.10.10 0 0 Specific Gravity 1. dry cleaning solvents and many other organic solvents.469-2251 25-198-PMS300. Below the dew point.5 7. FIBER CHARACTERISTICS Nylon Polyester Aramid Poly-Arylate UHMwPE K-Spec® Tenacity .Chemical Considerations SLINGS PERFORMANCE CHARACTERISTICS OF SYNTHETIC FIBERS ULTRA HIGH MOLECULAR POLYETHYLENE (UHMwPE) Resists many chemical agents and retained 100% of the original fiber strength when immersed for 6 months in the following: • 1M Hydrochloric acid • Gasoline • Sea water • 5M Sodium Hydroxide • Toluene • 10% detergent solution • Perchloroethylene • Kerosene • Hydraulic fluid • Glacial acetic acid • Hypophosphite solution (10%) • Ammonium Hydroxide (29%) Clorox® degraded UHMwPE by approximately 10% after a 6 month immersion test.Dry G/D 7.0 <0.8 2. Wire Rope and Wire Mesh slings should be padded with adequate materials to protect the sling. evaluation and proper application of protection devices. loss control. Germain.800 pound per inch. Remember.Recommended Standard Specification for Synthetic Web Slings (WSTDAWS-1-2004).indd 43 43 4 www. Web slings can have a 12.9-2006 Sling Safety Standard and had previously been removed from the Web Sling and Tie Down Association. a mandatory rule of the standard for all synthetic slings.lift-it. method of rigging for load control and sling protection devices to ensure success. It is important to realize that abrasion protection materials. Gary O’Rourke. There is no form of protection that is cut proof.X. 5 and 6 for synthetic rope. was changed to shall. 909. web and roundslings. One may improperly rationalize and conclude that chain. Twin-Path® Extra. should (a recommendation to be considered in Chapters 1.9-2010 Sling Safety Standard requires that all synthetic slings shall be protected from damage. “Sharp” was removed from the ASME B30. Gelskey. inspector. Slings exposed to abrasion and cutting are the single greatest source of accidents.com 3/1/12 3:57 PM .. except. The results for roundslings are included in WSTDA-RS-1(2010) Recommended Standard Specification for Roundslings. Testing conducted by Slingmax®. Synthetic slings are susceptible to heat damage and damage from cutting and abrasion. basket Work Load. All slings have limitations. basket Work Load. wire rope and wire mesh slings are not totally “bullet” proof in all applications and can also be damaged.4(d). has completed testing to determine the effects of various sized edge radii on web and roundsling strength. High Performance Fiber Slings can have a 25. Several “test” lifts may be necessary to determine the best sling. designs and technology work differently from those methods taken to provide protection from cutting. wire rope and/or wire mesh slings should be used in all harsh situations. and 3). Knut Buschmann and the author will profoundly influence the direction of the sling and rigging industry. Compression and tension combined with a “moderate” edge and non-positive sling to load engagement. Successful Rigging = Successful Living. safety and qualified person(s) must continue to be responsible and be involved in the selection. death and destruction. i. injuries. the sling skipping across the load edge.Reflections on Sling Protection By Michael J. Another common misconception is sling protection devices will perform equally well when subjected to abrasion and/or cutting. I believe the initial steps of developing performance ratings for sling protection devices by visionaries: Dennis St. Sr.000 pound requirement: CornerMax® Pads. Chapters 1. ASME B30.9 subcommittee and the WSTDA-Web Sling committee removed sharp from their publications because the edge need not be “razor” sharp to damage any type of sling.469-2251 25-198-PMS300. The ASME B30. The results for web slings are being evaluated by the Web and Testing committees of the WSTDA.10. Four protection devices provided a sling protection “performance design factor” above the maximum 25. Mesh Guard® and Magnetic Corner Protectors.9-2006. which preclude the use of synthetics. Rigging Practices. The Web Sling and Tie Down Association. The ASME B30. It is important that responsible parties protect all slings from damaging load edges and surfaces with protection materials sufficient for the application and rig to properly control the load. Section. poor load control can render the best protection impotent. Chain. 9. The sling user. can result in sling damage and failure. We encourage all sling users to act responsibly and to evaluate sling protection devices and slings in a nonconsequence set of circumstances. The proper approach should always be to use the “right” sling for the job to minimize risk and exposure. 2 and 3 stated that Chain. Slings and protection must be removed. Unirope® and Lift-It® evaluated various sling protection materials and constructions. Test lifts can easily be made at minimum heights to determine sling protection adequacy.000 pound per inch. CornerMax® Sleeves. The results are featured on page 44. The aforementioned radii tests and test protocol under consideration by the WSTDA may provide the basis for establishing protection ratings for various forms of engineered protection devices.e. The sling protection language in the ASME Sling Safety Standard-Rigging Practice section is similiar in Chapters 4. Synthetic slings are not the absolute solution for all rigging applications. 2. inspected and evaluated after each test lift. the goal is to ensure that the sling maintains its ability to securely lift the load while avoiding contact with damaging or abrasive surfaces under tension.com 3/1/12 3:57 PM . Slings must ALWAYS be protected from cutting and damage by edges. protrusions and abrasive surfaces in contact with the sling with materials of sufficient strength. Regardless of the particular method chosen. The length of the sleeve or protection material(s) must not interfere with the sling closing to the full gripping position on the load. connection points and/or the load. while it is being lifted or suspended. 909. CornerMax® Sleeves and Meshguard® sling protectors are rated for cut resistance. Magnetic Corner Protectors. thickness and construction to prevent damage and catastrophic sling failure. abraded or cut as tension and compression develops between the sling. but offer virtually no protection against the effects of cutting. Inspect the sling protection before each use and remove if damaged. corners. Twin-Path® Extra High Performance Slings can develop 25.800 Lbs.000 Lbs. Sling protection may not prevent cutting or other forms of damage. Damaged or misused sling protection can result in sling failure. Several “test” lifts. Be sure sling protection is the correct type and size to protect the sling. selecting and using cardboard. personnel should be kept away from the load and never be under or near the load.lift-it. A qualified person must carefully consider the appropriate means to accomplish this goal by selecting sling protection appropriate for the types of exposure damage.. You should always operate within the specified sling and protection device limits. Materials must be evaluated and selected based upon the application and type of exposure.Sling Protection SLINGS Any sling can be damaged.e. per Inch Work Load Limits.indd 44 44 4 www. Certain materials used in sling protection have been evaluated for cut resistance. “Cut proof” sling protection does not exist. for this reason personnel should never be under or on the load.) SLING PROTECTION TESTING RESULTS CornerMax® Pad CornerMax® Sleeve Mesh Guard Magnetic Corner Protectors Sling protection must be installed and evaluated for suitability by raising the load slightly and then lowering the load for an inspection of the sling and the protection devices. Some materials are suitable for abrasion resistance. Personnel should never be next to rigging that is under tension. while the load is lifted or suspended. per Inch Work Load Limits. A combination of non-positive sling to load contact (sling slipping across the load) and inadequate sling protection materials may result in sling protection damage and failure. The edge of the load does not have to be “razor” sharp to create the conditions for sling failure. Pressure (Lbs. Sling protection may not prevent cutting or other forms of sling damage. work gloves or other such items that were not designed to serve as protection devices). inspections and evaluations may be necessary to determine the proper form of protection for a successful lift. Web slings can develop 12.469-2251 25-198-PMS300. To avoid severe personal injury or death. CornerMax® Pads. The protection used should not be makeshift (i. Sleeve Length. corners or surfaces. CornerMax® Sleeve must always cover coil edge. S A TUNNEL or “NO TOUCH ZONE” IS FORMED BETWEEN THE PAD AND LOAD CORNER. Up to 10 in. Inspect the sling and sleeve before each use. DEATH or INJURY can occur from improper use.500 Lbs. CHTUFXKS 4000 x 13 Ft. Prevent sling protection and slings from slipping or sliding across load edges. Do Not Use if Red Yarn is Visible in CornerMax® Sleeve. Up to 12 in. CMSDF-4 4. The no touch zone greatly reduces the possibility of cutting. per inch of sling contact width DO NOT EXCEED 25. CORNERED load fully engages the internal walls of the protector. PER INCH OF SLING CONTACT WIDTH.000 Lbs.65 2.Sling Protection CORNERMAX® PADS To be effective.35 5.8 Ft.35 1. Up to 6 in.) 2 3 4 6 6 8 10 12 14 1 to 2 in. Please Note: CornerMax® Pads are 10.10 1. Basket at 90 Deg. CORNERMAX® SLEEVE STOCK NUMBER INTERNAL SLEEVE WIDTH CMSDF-10 10 In.469-2251 25-198-PMS300. Damaged or misused sling protection can result in sling failure. CORNERMAX® PAD OVERALL WIDTH STOCK NUMBER (Inches) CM-4 CM-5 CM-6 CM-8 CM-8 CM-10 CM-12 CM-14 CM-16 SLING WIDTH (Inches) UNIT WEIGHT (Lbs. NO * Use Rod Width for determining maximum loading. DO NOT EXCEED 25. corner contact. Up to 5 in. 3 in. Up to 8 in. Up to 14 in. DO NOT use Pad Width. Traditional sling protection has always relied on these attributes to prevent damage to the sling because of direct contact with damaging load edges.50 6. conventional forms of sling protection must be of sufficient strength.500 Lbs. CORNERMAX® SLEEVES CornerMax® Sleeves are an ideal solution to protect slings from cutting when it is not practical to use protection that is based upon full. CornerMax® Pad ratings are only valid if the 90 degree. thickness and construction.000 LBS.indd 45 45 4 www.5 In. CMSDF-6 6 In. 4 in. CMSDF-8 8 In.5 In. Be sure the Sling Protection is the correct type and size to protect the sling. 1. Coil Handler Slings are easy to pull and “fish” through coils and are non-damaging and repairable. 7.744. “Cut proof” sling protection does not exist.com 3/5/12 11:09 AM . 909. maintenance and/or inspection.10 2. *DO NOT EXCEED 12. CORNERMAX® PADS ARE FOR USE ON 90 DEGREE CORNERED LOADS.500 Lbs.000 LBS. US Patent No.000 LBS. Narrower and Wider Sleeves are available Increase productivity and decrease discharge time with Lift-It® Coil Handler Slings. Patented CornerMax® Pads are truly remarkable because of the tunnel or “no touch zone” that is formed between the load corner and the CornerMax® Pad.25 inches in length. NO 12. 10 Times lighter than steel sling alternatives. Stock No.80. unless otherwise specified. Inspect sling protection before each use and remove if damaged.lift-it.138.70 3.10 2. CMSDF-2* 2. CornerMax® Sleeves conform to the curvature of the load and are manufactured from “high tech” fibers. PER INCH OF SLING CONTACT WIDTH. CornerMax® Sleeves have been tested in independent laboratory and field applications and have proven to be extremely cut resistant. PER INCH OF SLING CONTACT WIDTH. Note that the sides of the load must completely support CornerMax® Pads in order to create and maintain “the tunnel”. 90º. ROD WIDTH * (Inches) NO Simulated Load Edge MAXIMUM LOADING: 25.50 4 5 6 8 8 10 12 15 17 YE 12.. 00 12-1/4 MCP-SL-18HD Slotted-Hvy. Slings and protectors should be vertical or perpendicular to the load.25 6-1/2 MCP-9 Regular UP TO 7 1. Inspect sling protection before each use and remove if damaged. Hook and loop closure bands make attachment and removal quick and easy. Heavy Duty Magnetic Protectors provide a larger contact diameter. Magnetic Corner Protectors can be used at temperatures from -20°F/-29°C to 220°F/104°C.50 4.75 12-1/4 MCP-18HD Heavy Duty UP TO 16 13. Magnets are designed to keep Magnetic Corner Protectors from falling from metallic loads and are not intended to prevent the protector or sling from sliding. Magnetic Corner Protector ratings are valid if the 90 degree. making installation and removal.) 20. resulting in load instability and uncontrolled load descent. Curved Magnetic Corner Protectors are custom made to fit the exact curvature of your load.00 18-1/4 MCP-SL-6 Slotted-Regular UP TO 4 2.indd 46 Regular Magnetic Corner Protectors are fabricated from a durable synthetic material that protects synthetic and wire rope slings from damage. Duty UP TO 10 11.50 18-1/4 MCP-CURVE* Curved * You must specify inside diameter of coil and sling width Heavy Duty 909. Always Specify: Sleeve Length See page 52 for ordering information. Felt Sleeves provide protection from abrasion damage caused by contact with rough surfaces.000 60. Duty UP TO 7 8. Keep magnets clean and free of debris. Spacer Protectors are necessary in applications where slings are not perpendicular (sling-toload angles less than 90 degrees).) 2.50 8.000 HOOK & LOOP CLOSURE BANDS WEIGHT (Lbs. The farther from vertical slings and protectors are.000 40. Slotted Magnetic Corner Protectors are available. Double or triple thickness Felt Sleeves are also available.lift-it.00 6-1/2 MCP-SL-9 Slotted-Regular UP TO 7 2. Damaged or misused sling protection can result in sling failure.25 12-1/4 MCP-SL-18 Slotted-Regular UP TO 16 5.25 6.50 18-1/4 MCP-SL-6HD Slotted-Hvy. Please specify flange thickness and width.00 5.L. the more likely the protectors and slings will slide to become vertical. Magnetic Corner Protectors are for use on 90 degree. MESH GUARD® Lift-It® Mesh Guard® features a unique combination of Sling Protection materials.000 40. Sling must not be allowed to run off the edge of the wire mesh. Duty UP TO 16 16.Sling Protection SLINGS FELT SLEEVES . (Inches) MCP-6 Regular UP TO 4 1.000 60.00 2.00 WIRE MESH TUBULAR BULKED NYLON 3/8” THICK FELT Mesh Guard® is for use on 90 degree cornered loads. per inch of sling contact width.469-2251 25-198-PMS300. A layer of felt buffers the sling while carbon steel wire mesh covers the load edge.com 3/1/12 3:58 PM .00 12-1/4 MCP-18 Regular UP TO 16 3. MAGNETIC CORNER PROTECTORS MCP STOCK NUMBER STYLE SLING WIDTH (Inches) UNIT WEIGHT (Lbs. SLING WIDTH (Inches) 2 3 4-5 6 8 10 MESH GUARD® STOCK NUMBER MG-3 MG-4 MG-6 MG-8 MG-10 MG-12 MESH GUARD® OVERALL WIDTH (Inches) 5 6 8 10 12 14 PROTECTION RATING (Lbs. Felt Sleeves can be made to fit any sling and are available in long lengths which can be cut into suitable sizes at the job site.000 20. Magnetic Corner Protectors are “protection rated” at 12. Be sure sling protection is the correct type and size to protect the sling./Ft.75 9-1/2 MCP-12HD Heavy Duty UP TO 10 8. but are not rated higher than Regular Magnetic Corner Protectors.65 9-1/2 MCP-12 Regular UP TO 10 2.ABRASION PROTECTION Lift-It® Felt Sleeves blend two wear protection materials: Polyester Felt covered by Bulked Nylon.500 Lbs.00 18-1/4 MCP-9HD Heavy Duty UP TO 7 6.50 6-1/2 MCP-SL-9HD Slotted-Hvy.) CORNER PROTECTOR O. Quick Felt Sleeves are available with hook and loop tape. Duty UP TO 4 5. “cornered” loads and keep the sling from contacting load edges.A. depending upon the severity of the application. quick and easy. Slotted 46 4 Curved Retainer Strap www. CORNERED load fully engages the internal walls of the protector.00 9-1/2 MCP-SL-12HD Slotted-Hvy.75 9-1/2 MCP-SL-12 Slotted-Regular UP TO 10 4. “Minor” damage is extremely serious and damaged slings must be removed from service. identical. The other three slings were deliberately cut on one edge to simulate: 1/8 inch. there is ZERO tolerance for sling damage. 1/8 IN.26.Effects of “Minor” Edge Damage Four. Be pro-active and prevent sling damage from occurring by employing suitable Sling Protection. All independent variables were controlled. CONTROL BREAK . immediately and not used for other applications.050 Lbs. break strength. machine and fabricator were used for this experiment. CUT – 22. 3/8 IN. vertical and we would expect 24. The slings were pulled to destruction.480 LBS.050 LBS. This seemingly “minor” damage resulted in very significant strength loss. The control sling broke at 26. The slings (EE1-903) are rated at 4800 Lbs.090 LBS.000 Lbs.com 3/1/12 3:58 PM . single ply slings were fabricated from a single roll of webbing.indd 47 47 4 www. CUT – 18. 1/4 inch and 3/8 inch cuts. CUT – 15. 1/8” Certificate of Test Certificate of Test 1/4 IN. as the same thread. Remember.150 LBS.lift-it.469-2251 25-198-PMS300. 1/4” 3/8” Certificate of Test Certificate of Test 909. Neoprene.Sling Protection SLINGS SLEEVES Sleeves cover both sides of the sling and can be moved to a specific location. tubular and quick-sleeve constructions. they can be cut and fail catastrophically. (See pages 69 and 70). Inspect sling protection before each use and remove if damaged.lift-it. The eye buffer can also be full length. exposed threads. Full length Eye Wrap is also available. See Page 218. Consider using Polyester Max Edge™ webbing.com 3/1/12 3:58 PM . www. SHACKLE PIN PROTECTOR PADS Shackle Nominal Diameter (Inches) Shackle Pin Protector Pad Stock Number 5/8 SPPP-580 3/4 SPPP-750 1 SPPP-1000 1-1/4 SPPP-1025 1-3/8 & 1-1/2 SPPP-1500 1-3/4 SPPP-1750 2 SPPP-2000 2-1/2 SPPP-2500 • Full length protection. consider Eye Sleeves.indd 48 48 4 Placing synthetic slings on shackle pins should be avoided. If synthetic slings contact this area. Body Wrap covers the webbing surface and the edges. Damaged or misused sling protection can result in sling failure.469-2251 25-198-PMS300. EYE BUFFER If specified. Sling eyes are wrapped with Bulked Nylon. Leather. Available in sewn edge. Sleeves can also be re-positioned for quick and easy inspection of the sling. • Installation and removal in seconds. Edge Wrap may be necessary in applications where abrasion damage occurs. EYE SLEEVE When additional protection is needed. Sling Eyes can be lined with Eye Buffers at the bearing point. Available in six different materials: Bulked Nylon. Please specify: • Eye width and thickness • Sleeve material • Sleeve length BODY WRAP Body Wrap is similar to the sleeve. Nylon. 909. but is sewn to a specific location. Leather Wear Pads in excess of 5 feet are not recommended. Be sure the Sling Protection is the correct type and size to protect the sling. Hook and loop tape makes installation effortless and removal is quick and easy for inspection. If you must rig on the pin. EDGE WRAP Bulked Nylon or leather is sewn around the edge of the sling. See page 56 for ordering information. EYE WRAP Eye Wrap at the bearing point is standard eye protection offered by Lift-It®. in single or multiple layers and can be attached to one or both sides of the sling. Even a new shackle can have damaging. See page 56 for ordering information. WEAR PADS Wear pads are sewn to the sling for protection at specific wear areas. Wear Pads can be sewn at any location. CornerMax® and Felt. protect your sling with a Shackle Pin Protector Pad or use a Bolt Type Anchor Shackle. • Three connection points secure pad to shackle. including ear seams. 4. Secutex Sleeve for 6 inch sling width. 3.) 1 in.469-2251 25-198-PMS300.lift-it. •The sling must be firmly positioned against the load edge and the sling must be free to slide inside the Secutex Sleeve. See page 103. The entire sling body can easily be inspected by removing Secutex Sleeves from the sling. •Use a non-slip base. 1 in. •Only use with single. lengths that may be cut into the specific lengths. 180° 90° 2/3 1/1 1/2 1/1 Maximum loading: 2500 lbs. Coil edges must not be broken or contain any burrs. 90 Degree Coil Turn Necessary length of Secutex Sleeve= 2 x Height + 2 x Width + 2 x Overhang (1 in. rubber mat or Secutex turning mat. B H 1 in. •Do not use an oversized Secutex on a sling having inadequate width for Secutex Sleeves. B 1 in. H B B B H H 90 Degree Turn Necessary length of Secutex Sleeve= 2/3 of the body length. per inch of web width. •All load edges must be covered by the Secutex Sleeve during use.. Secutex Sleeve for 2 inch sling width. Sold only in 16 ft. Stock Number Designation for Secutex Sleeves: SECS-2: 16 Ft. 180 Degree Turn Necessary length of Secutex Sleeve= 1/2 of the body length. 909. 1 in. •Ensure that the coil cannot roll away or slip sideways onto the sling and sleeve. Available for: 2. when finished re-install. SECS-6: 16 Ft.com 3/1/12 3:58 PM . 1 in.indd 49 49 4 www. 6.e. B H B H 1 in. •Make sure that the length of the sleeve does not interfere with the sling closing to the full gripping position on the load. •Start slowly so that the Secutex Sleeve and sling can be positioned correctly. unpacked and cleanly wound coils. 1 in. i. For use with single ply slings. B B H B B H 1 in. reinforced material. Match size to size.Sling Protection SECUTEX SLEEVES Secutex Sleeves are made of transparent.078” (2mm). 8 10 and 12 inch web widths. •Secutex Sleeves must be reinforced if the load edge radius is less than . Do not pull coils “out” at an angle. Use only with single ply rated slings.) 180 Degree Coil Turn Necessary length of Secutex Sleeve= 3 x Height + 2 x Width + 2 x Overhang (1 in. H B B H 1 in. Chaffing Gear can be supplied in a single length for on-site cutting of custom lengths. Velcro® Hook (backside) 3) Overall width and length 909. SLINGS Lift-It® Chaffing Gear protects expensive mooring and tow lines from damage.469-2251 25-198-PMS300. Bulked Nylon or Felt Velcro® Loop 4) Always consider the effective width for TYPE “B” Chaffing Gear.lift-it. 5) Allow extra width to compensate for line swelling.) Rope Diameter (Inches) Rope Circumference (Inches) 8 8 8 8 8 8 10 10 10 10 10 10 12 12 12 12 12 12 14 14 14 14 14 14 16 16 16 16 16 16 CGA-8-W CGA-8-C CGA-8-F CGB-8-W CGB-8-C CGB-8-F CGA-10-W CGA-10-C CGA-10-F CGB-10-W CGB-10-C CGB-10-F CGA-12-W CGA-12-C CGA-12-F CGB-12-W CGB-12-C CGB-12-F CGA-14-W CGA-14-C CGA-14-F CGB-14-W CGB-14-C CGB-14-F CGA-16-W CGA-16-C CGA-16-F CGB-16-W CGB-16-C CGB-16-F Web Bulked Nylon Felt Web Bulked Nylon Felt Web Bulked Nylon Felt Web Bulked Nylon Felt Web Bulked Nylon Felt Web Bulked Nylon Felt Web Bulked Nylon Felt Web Bulked Nylon Felt Web Bulked Nylon Felt Web Bulked Nylon Felt A A A B B B A A A B B B A A A B B B A A A B B B A A A B B B N/A N/A N/A 2 2 2 N/A N/A N/A 2 2 2 N/A N/A N/A 2 2 2 N/A N/A N/A 2 2 2 N/A N/A N/A 2 2 2 N/A N/A N/A 7 7 7 N/A N/A N/A 8 8 8 N/A N/A N/A 10 10 10 N/A N/A N/A 12 12 12 N/A N/A N/A 14 14 14 1-1/2 to 1-3/4 1-1/2 to 1-3/4 1-1/2 to 1-3/4 1-1/2 to 1-3/4 1-1/2 to 1-3/4 1-1/2 to 1-3/4 2 2 2 2 2 2 2-1/2 to 2-3/4 2-1/2 to 2-3/4 2-1/2 to 2-3/4 2-1/2 to 2-3/4 2-1/2 to 2-3/4 2-1/2 to 2-3/4 3 to 3-1/2 3 to 3-1/2 3 to 3-1/2 3 to 3-1/2 3 to 3-1/2 3 to 3-1/2 4 4 4 4 4 4 4-3/4 to 5-1/2 4-3/4 to 5-1/2 4-3/4 to 5-1/2 4-3/4 to 5-1/2 4-3/4 to 5-1/2 4-3/4 to 5-1/2 6-1/4 6-1/4 6-1/4 6-1/4 6-1/4 6-1/4 7-3/4 to 8-5/8 7-3/4 to 8-5/8 7-3/4 to 8-5/8 7-3/4 to 8-5/8 7-3/4 to 8-5/8 7-3/4 to 8-5/8 9-1/2 to 11 9-1/2 to 11 9-1/2 to 11 9-1/2 to 11 9-1/2 to 11 9-1/2 to 11 12-1/2 12-1/2 12-1/2 12-1/2 12-1/2 12-1/2 YOU MUST SPECIFY: 1) Gear Type: Type “A” or “B” 2) Material Type: Web.) Effective Width (In. Easy to install and remove. Chaffing Gear with Bulked Nylon (3/32”thickness) is four times more abrasion resistant than Web Chaffing Gear. Bulked Nylon or Felt.indd 50 Overall Pad Width Effective Pad Width 50 4 www. Hole TYPE “B” HOOK & LOOP TAPE 8”C/L-C/L CHAFFING GEAR SPECIFICATIONS Type “B” Overall Pad Width (Inches) Stock Number Material Type Velcro® Width (In. Material selection should be based upon: application. Chaffing Gear works equally as well with chain and wire rope assemblies. Chaffing Gear made with Web (3/16”thickness) is the most popular.com 3/1/12 3:58 PM . Chaffing gear is available in any width and length. TYPE “A” BRASS GROMMETS 3/8” Dia. abrasion resistance and/or material thickness requirements. Felt Chaffing Gear (1/4” thickness-high density felt) provides a “cushion” effect.Chaffing Gear Chaffing Gear is available in three materials: Web. web sling.2-1/2 3/4 . For Neoprene Sleeves use the material code prefix. Web Sling Width (Inches) Web Stock No. web sling.3/4 7/32 .Sling Protection Information ORDER CODE DESIGNATIONS SEWN BULKED NYLON .7/16 1-2 ply single leg 3-4 ply double leg 1 1 CQS-4 WQS-4 4 2 1 RS30-50-60-90 RS30-50 1/2 . LQS-5.“NQS”. NQS-4.indd 51 51 4 www.CQS QUICK WEB . Web Stock No.WS SEWN FELT .1-1/2 1/2 1 2 CQS-8 WQS-8 8 5 4 RS360-400 RS180-240 1-5/8 . For roundslings we would recommend the use of tubular sleeves.lift-it.7/8 RS800 RS400 1 RS1000 RS600-800 1-1/4 RS1000 For Leather Sleeves use the material code prefix. 909.“NS”.Stock No. Sleeve Width (Inches) CQS-3 WQS-3 3 Web Sling Width (Inches) 1 & 2 Ply 3 & 4 Ply Roundsling Single Leg Double Leg 1 Wire Rope Diameter (Inches) Velcro®. QUICK SLEEVE DIMENSIONAL DATA AND INFORMATION Bulked Nylon Stock No.FQS SEWN & QUICK SLEEVES . Example: Neoprene Sleeve (single leg) for RS90.(Inches) Chain Size (Inches) 1/4 .1-1/8 9/32 .“LS”.Stock No. Example: Leather Sleeve for 3 in.469-2251 25-198-PMS300. For Neoprene Quick Sleeves use the material code prefix. LS-5. Example: Leather Sleeve for 3 in.1-3/4 5/8 RS400-600 RS240-360 2 .9/32 1 1 CQS-5 WQS-5 5 3 2 RS120-150 RS60-90 7/8 .com 3/1/12 3:59 PM .WQS QUICK FELT . Please Note: Single Leg.FS QUICK BULKED NYLON .1-1/2 1/2 RS240-360 RS150-180 1-5/8 .BULKED NYLON AND WEB SEWN SLEEVE DIMENSIONAL DATA AND INFORMATION Bulked Nylon Stock No.2-1/4 5/8 2 2 RS600-800 RS360-400 1-1/2 RS1000 RS600 CQS-10 WQS-10 10 6 5 and 6 CQS-12 WQS-12 12 8 8 CQS-14 WQS-14 14 10 10 CQS-16 WQS-16 16 12 12 3/4 .“LQS”. Sleeve Width (Inches) 1 & 2 Ply CS-3 WS-3 3 1 CS-4 WS-4 4 2 1 RS90 CS-5 WS-5 5 3 2 RS120-150-180 CS-6 WS-6 6 4 3 CS-8 WS-8 8 5 and 6 4 and 5 CS-10 WS-10 10 8 6 CS-12 WS-12 12 10 8 CS-14 WS-14 14 12 10 Wire Rope Diameter (Inches) Roundsling 3 & 4 Ply Single Leg Double Leg RS30-50-60 Chain Size (Inches) 1/4 . NS-4.7/8 2 2 1 2 2 RS800 2 2 RS1000 2 2 For Leather Quick Sleeves use the material code prefix.3/4 7/32 RS30-50-60 7/8 .Stock No.Stock No.1-1/8 3/8 1 2 CQS-6 WQS-6 6 4 3 RS180-240 RS120-150 1-1/4 . Example: Neoprene Sleeve (single leg) for RS90. Sewn Sleeves for roundslings must be installed at the time of order.3/8 RS90-120 1-1/4 .CS SEWN WEB . 7/8 FQS125-12 FQS250-12 FQS380-12 12 8 8 RS1000 RS600 FQS125-14 FQS250-14 FQS380-14 14 10 10 RS800 FQS125-16 FQS250-16 FQS380-16 16 12 12 RS1000 FQS125-3 FQS-250-3 FQS380-3 3 1 FQS125-4 FQS250-4 FQS380-4 4 FQS125-5 FQS250-5 FQS380-5 FQS125-6 FQS250-6 FQS125-8 Double Leg Chain Size (Inches) 1/4 .250 thickness .. Web Stock No. Select Material: Bulked Nylon Web Felt (Specify thickness) 3. Stock No. Select Construction: Sewn Quick Tubular 2.3/4 7/32 RS30-50-60 7/8 .3/8 CQTS-8 WQTS-8 FQTS125-8 FQTS250-8 8 1/2 .1-1/8 3/8 FQS380-6 6 4 3 RS180-240 RS120-150 1-1/4 .380 thickness Width Stock No.e.Sling Protection Information SLINGS SEWN & QUICK SLEEVES .. (Inches) Web Sling Width (Inches) 1 & 2 Ply FS125-3 FS250-3 FS380-3 3 1 FS125-4 FS250-4 FS380-4 4 2 Double Leg Wire Rope Diameter (Inches) 1/4 .1 RS180-240 RS120-150-180 CQTS-14 WQTS-14 FQTS125-14 FQTS250-14 14 1 .250 thickness .2-1/2 RS800 HOW TO ORDER 1. 909.e.1-1/8 9/32 .FELT SEWN FELT SLEEVE DIMENSIONAL DATA AND INFORMATION Felt 1/8 In Felt 1/4 In Felt 3/8 In Sleeve .1-3/4 5/8 2 .125 thickness . Felt 1/8 In .1-1/2 1/2 FQS250-8 FQS380-8 8 5 4 RS360-400 RS180-240 1-5/8 . BNFS250-6 QUICK FELT SLEEVE DIMENSIONAL DATA AND INFORMATION Felt 1/8 In .2-1/2 FS125-8 FS250-8 FS380-8 8 5 and 6 4 and 5 RS400-600 RS240-360 FS125-10 FS250-10 FS380-10 10 8 6 RS800 RS400 1 RS1000 RS600-800 1-1/4 FS125-12 FS250-12 FS380-12 12 10 8 FS125-14 FS250-14 FS380-14 14 12 10 3/4 . i. add “BN” as an order code prefix.469-2251 25-198-PMS300. Stock No.com 3/1/12 3:59 PM .9/32 5 3 2 RS120-150 RS60-90 7/8 .5/8 RS30-50-60 CQTS-10 WQTS-10 FQTS125-10 FQTS250-10 10 3/4 RS90-120-150 RS30-50-60-90 CQTS-12 WQTS-12 FQTS125-12 FQTS250-12 12 7/8 . Felt 1/4 In .125 thickness Stock No.indd 52 STOCK NUMBER DESIGNATIONS MATERIAL BULKED NYLON CONSTRUCTION SEWN QUICK CS TUBULAR CQS CQTS WEB WS WQS WQTS FELT 1/8” FS125 FQS125 FQTS125 FELT 1/4” FS250 FQS250 FQTS250 FELT 3/8” FS380 FQS380 N/A 52 4 SLING PROTECTION INFORMATION Lift-It® Sling Protection is constructed from the following materials: Materials Bulked Nylon Webbing (9) Webbing (6) Leather Neoprene Felt Thickness 3/32” 3/16” 1/8” 3/32 or 1/8” 1/8”-3/16”-1/4” 1/8”-1/4”-3/8” www.lift-it. Specify Stock Number (Based on sling width or model) 4.3/4 7/32 .1-1/2 1/2 FS125-6 FS250-6 FS380-6 6 4 3 RS240-360 RS150-180 1-5/8 . Specify Protection Length.7/16 1 *For Quick Felt Sleeves with Bulked Nylon covers. Stock No. add “BN” as an order code prefix.2 2-1/4 . (Inches) Web Sling Width (Inches) 1 & 2 Ply Wire Rope Diameter (Inches) Roundsling 3 & 4 Ply Single Leg 2 1 RS30-50-60-90 RS30-50 1/2 . WEB AND FELT QUICK TUBULAR SLEEVE DIMENSIONAL DATA AND INFORMATION Bulked Nylon Stock No.BULKED NYLON.250 thickness Stock No.125 thickness Stock No.380 thickness Width Stock No.1-1/2 1-3/4 . Felt 1/4 In Felt 3/8 In Sleeve .7/8 RS1000 *For Sewn Felt Sleeves with Bulked Nylon covers.2-1/4 5/8 FQS125-10 FQS250-10 FQS380-10 10 6 5 and 6 RS600-800 RS360-400 2-1/2 3/4 . Sleeve Width (Inches) Chain Size (Inches) Roundsling Single Leg Double Leg CQTS-6 WQTS-6 FQTS125-6 FQTS250-6 6 9/32 .1-1/4 RS360 RS240 CQTS-16 WQTS-16 FQTS125-16 FQTS250-16 16 RS400 RS360 CQTS-18 WQTS-18 FQTS125-18 FQTS250-18 18 RS600-800 RS400 CQTS-20 WQTS-20 FQTS125-20 FQTS250-20 20 RS1000 RS600 CQTS-22 WQTS-22 FQTS125-22 FQTS250-22 22 Wire Rope Diameter (Inches) 1 . i. BNFQS380-8 QUICK TUBULAR SLEEVES .3/8 Roundsling 3 & 4 Ply Single Leg RS30-50-60 1 RS90 Chain Size (Inches) FS125-5 FS250-5 FS380-5 5 3 2 RS120-150-180 RS90-120 1-1/4 . The longitudinal (warp) load yarns carry approximately 70% of the load.lift-it. users and inspectors. YELLOW: Load carrying surface yarns. “MIL-SPEC” WEBBING RED: Load carrying surface yarns.469-2251 25-198-PMS300. providing a signal to users and inspectors to remove the sling from service. 15.18 YES NO PIGMENT DYE CONDITION “U” UNSEWN TENSILE STRENGTH 15.15 . .14 . to maximize profit margin. ORANGE: Longitudinal (Warp) yarns carry the majority of the load. “MIL-SPEC” WEBBING NYLON NYLON 2 IN. 909. do not use the sling. EFFECTS OF SURFACE ABRASION DESCRIPTION MATERIAL WIDTH THICKNESS RED CORE YARN FINISH SLING WEBBING VS Do not operate under the misconceptions. 1. BLUE: Load carrying binder yarns. 53% 87% % LOSS RED CORE YARN “SENSIBILITY” WEAR OR DAMAGE TO COVER YARNS OF SLING WEBBING RESULTS IN IMMEDIATE STRENGTH LOSS. RED: Red core yarns.12 . In many applications. Red core yarns may become visible. but educated. Military specification or “Mil-Spec” webbing is not designed for lifting. Sling webbing features a “stuffer” weave design. other removal from service criteria and be a responsible user and inspector. DAMAGE DESCRIPTION HEAVY ABRASION LIGHT ABRASION TENSILE STRENGTH AFTER DAMAGE 7. while the remaining strength is derived from the cover.000 Lbs. Red core yarns must be used in conjunction with other removal from service criteria and visual/tactile inspection techniques to determine sling condition. IF RED CORE YARNS ARE NOT VISIBLE. Why would a manufacturer supply “MIL-SPEC” or tie down web for a lifting assembly? The answer is simple. Since the load carrying yarns are surface exposed.com 3/1/12 3:59 PM .900 Lbs. I’ll be dead” or the red yarns “pop out at you” when the sling is not safe to use or during lifting to alert users of overloading. Pay attention to the many. as the outer cover is worn away or becomes damaged. PURPLE: Surface (Weft) yarns carry a portion of the load. “If I see red. If there is any doubt. Our problem with that is your safety is compromised. slings become extremely dirty. side-to-side (weft) yarns. Red core yarns cannot be used exclusively to determine the condition of the sling. Red core yarns are woven into the central load carrying yarn area. The inner load carrying yarns are jacketed by an outer cover. BLUE: Lateral yarns woven into the surface yarns. “Mil-Spec” webbing does not feature red core yarns and does not employ a stuffer weave design. 53 4 www. Nothing prevents its use in lifting applications.Design Features SLING WEBBING Lift-It® web slings are fabricated from sling webbing. making it difficult to see the red core yarns. subjected to minor surface damage is radically reduced. 1-3/4 IN. See page 34. informed sling purchasers.000 Lbs. GREEN: Binder yarns secure the surface and core yarns.000 Lbs.indd 53 DO NOT USE SLINGS THAT ARE STRUCTURALLY DAMAGED.. the tensile strength of Mil-Spec webbing.. lift-it. other Design Factors are available. Slings must be inspected at different levels and at specified times. All you need to do is specify. In addition to the sling tag. SLING and WARNING TAGS A heavy duty tag is attached to all slings. DO NOT APPLY. they too can cause damage and affect sling strength.Design Features Sling Thickness Tolerance 1 Ply 1. Synthetic Inspection Tags are available on request for an additional charge. Proper use. electrical tape are also used. inspection and accident prevention measures are enhanced by the Lift-It® Sling and Warning Tag System. When specified. Untreated web slings are also available upon request. Any instantaneous change (sudden drops or rapid acceleration) constitutes hazardous shock loading and THE WORK LOAD LIMITS AS STATED. Developed by the Web Sling and Tie Down Association. return to us for re-labeling. Synthetic Inspection Tags include a matrix for memorialization and visual verification of periodic sling inspections.com 3/1/12 3:59 PM . but could damage the sling by hanging up during use. For exact tolerances or matched slings. Others attach metal tags that are not only time consuming to make and attach. Custom tags can also be attached for a nominal charge. contact us. Some inspectors dip the sling into paint (not only a hassle. The Design Factor does not allow the user to exceed the Work Load Limit.0 Inches + 2% of Sling Length 3 & 4 Ply 3.0 Inches + 3% of Sling Length TREATED WEBBING Lift-It® slings are manufactured from industrial sling webbing that has been treated in the final stages of looming. 909. How does one visually validate that the periodic inspection. use and inspection information. add 1/2” to the following values. Hitch diagrams. Zip Ties and colored. UNIQUE I. Our slings can be used in compliance with OSHA and ASME specifications.D. it contains important safety. while enhancing sling service life. SLINGS DESIGN FACTOR All NEW Lift-It® slings are designed and rated with a Design Factor of 5 to 1. it’s a messy hassle that can affect sling performance.469-2251 25-198-PMS300. quarter or year).indd 54 54 4 www. We supply the Inspection Loop™ and you supply the Zip Tie. but if they are attached too snuggly.5 Inches + 1. Painting slings is not only a hassle. For Web slings wider than 6 inches. All necessary information required by the various regulatory agencies is laser imprinted into synthetic leather. WARNING TAGS LIFT-IT® INSPECTION LOOP™ Zip Tie ion Inspect Loop Metal tags are not only a hassle to make and maintain. has been done? Sling Inspectors may meticulously track individual slings and rigging equipment. testing conditions that will never be duplicated during actual usage and the sling being in a new or “as new” condition. done at least annually. It is important for sling users to realize Work Load Limits are based upon: destruction testing done in laboratory controlled. INSPECTION TAG DATE OF MFG. NUMBER Durable. If the Sling or Warning Tag becomes detached or illegible.5% of Sling Length 2 Ply 2. but a messy hassle) to “visually” signify that the periodic inspection was done. The treatment helps seal out moisture and dirt. A unique identification number would be necessary to differentiate identical slings or equipment. We supply the Inspection Loop™ and you supply the colorized zip tie denoting the specific inspection interval (month. recording the condition. unless otherwise stated. The Lift-It® Inspection Loop™ does not damage slings or components. a warning tag is also attached. including removal from service criteria. care. “Inspection Loop” on your order to take the first step to inspection efficiency. MANUFACTURING TOLERANCE All Lift-It® web slings are manufactured to the following tolerances. reducing the effects of abrasion. date of manufacture and a unique sling identification number are also included. but they can hang up and damage the sling. Imagine the simple beauty of visually surveying multiple slings and easily determining that slings had been inspected during a specific time period. resulting in the most durable tag available. We also offer custom. WARNING.indd 55 55 4 www. engraved metal tags.469-2251 25-198-PMS300.Sling Tags and Engraving SLING TAGS: INSPECTION. Shackles and other fittings that have a flattened area can also be engraved.com 3/1/12 4:00 PM .lift-it. CHIP ENCLOSED RFID TAG INSPECTION TAG WARNING TAG CUSTOM TAG METAL TAG ENGRAVING 909. CUSTOM AND RFID In addition to the Lift-It® Inspection Loop there are several other ways to visually validate that the periodic inspection has been done.