. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . separate stationery gangs at the loading and . (b) Distance to be travelled. LOADING / UNLOADING TIME Time to be allowed (per unit) in minutes Loading’ ‘.000 Nos per. inclusive of manouvring the vehicle in position.14’cd m 5. boulders. checking. ‘unloading points can be employed.. octroi. 12 6.. The speed will work out lesser for short trips and may go up to about 35 to 40 kmph for long distances to be travelled on open roads..‘6 6 6 3 6’ 6 6 9 8 Ideal Strength of labour gang to be employed 2 3 . ..10” (height of tailboard). Average speed. stones etc.. . S =’ Speed of truck in km per hour.. leading to economy: : :’ ‘. 44 TRANSPORTATION Output of vehicles for transportation of materials depends on :(a) Carrying capacity of vehicles by weight or volume. Time required for loading and unloading of various building materials using manual labour is given in the table below. from its place of parking to duty and back.6 6 4 B 6 6 6 .trip of =t + truck in minutes . Time in of labour gang to minutes _.. 4 ‘30 10 ‘. (cl) Idle time in waiting for turn at loading ‘and unloading point. shingle.: . : Unloading’ Time in minutes 3 ‘Materials handled . documentation and checking . as applicable. toll posts etc. D = One way distance in km: H = ‘Number of hours of work per day. documentation. vehicle and traffic. a two-bullock cart may be taken as 1. t = Time taken in minutes for loading + time taken in minutes for unloading + average time lost in minutes per trip for payment. of vehicle depending on the condition of road. requires about 4 minutes per vehicle for loading and 3 minutes per vehicle for unloading.3 cu m Cement in bags Flooring tiles. of20 x 20 cm size Timber in cut sizes Miscellaneous stores 120D ------s per tonne 1. applicable..’ Unit Ideal strength ‘.. (f) The carrying space in a ten tonne truck measures approximately 14’ . Where a . ‘and unloading by tipper trucks/dumpers for ‘materials like earth. W h e r e :.3 cu m. (e) Time lost in payment. Efficient loading using chutes or machine operated shovels. aggregate.. if any. (c) Time taken in loading. Average speed of trucks may be taken as 25 kmph. :. When checking back on the number of kilometres done suitable allowance should be made for the movement of vehicle . : be employed 5 3 .very large quantity of materials is to be moved employing several trucks.at loading and unloading points and at octroi and check posts. _:’ Regional transpoit authorities allow 6 labourers to travel along with the truck for loading and unloading purposes.. whichever is critical.25 cu m or 1 tonne travelling at a speed of about 3 to. for loading. 10’ Number of trips to be done by a truck L per day ’ Time’ required per round. where.7” x 7’ .3” x 1’ . : : . (say 6 km/day on an average). 10 tonne 3000 Nos .i . which for all practical purposes of calculations is taken as 185 cft or 5. and in unloading.4 . .cu m per cii in 30. sand. _ : .