two way slab design excel sheet

Sheet1Design of Slab as per IS:456-2000: Input Data: 1 Material : Concrete Grade M 25 Reinforcement Steel Grade Fe 500 Dimensions: Short Span : Lx: Long Span : Ly: 3.2 5.8 m m Effective Cover: 25 mm Boundary Condition: 1 Load : Floor Finish Load wf: Live Load wL: Load Factor for BM: Load Factor for SF: Calculations: Aspect ratio=Ly/Lx= Slab designed as: 3 (Cover should comply clause 26.4 of IS:456) * For Two way slab,refer the sketch on the right side.Dark line shows the continuity. * For one way continuous slab, 5 for Intermediate Panel,7 for end Panel, * For one way discontinuous slab, 9. * For cantilever slab, 10. 1 kN/m2 4 1.5 1.5 kN/m2 5 7 9 1.8125 Two Way Slab Bending Moment Coefficients: ax support = 0.0613 For short span support moment. ax span = 0.0460 For short span span moment. ay support = 0.032 For Long span support moment. ay span = 0.024 For Long span span moment. Depth assumed D = Selfweight wself =25xD/1000= 150 mm 2 3.75 kN/m OK ( Density of concrete assumed 25 kN/m 3) 2 Load intensity = w = wself+wf+wL= 8.75 kN/m Effective depth d= D - Eff. Cover= 125 mm Factored Bending Moments=Factor x w x Coefficient x Lx2 Mu/bd2 pt req Mux support= Mux span= 8.232 kN m 6.182 kN m 0.527 0.396 % 0.124 0.093 Muy support= Muy span= 4.301 kN m 3.226 kN m 0.275 0.206 0.064 0.048 Page 1 Ast req Explanation: mm2/ m 2 6 2 155.33 Mu/bd =Mux10 /(1000xd ) 115.91 pt req is from charts of SP-16. 80.16 Ast= ptx1000xd/100 59.93 610 so.469 As per Clause 40. OK Page 2 Ast= Ast= Ast= Ast= 61.1 IS:456:2000 k= 1.419 N/mm2 tc= 0.54 753.2 565.Sheet1 2 180 mm per meter Minimum Ast req=0.168 %reinforcement= 0.1.5 mm OK OK OK OK .2.2 392.2.3 N/mm2 kxtc= 0.12xD/1000= Reinforcement Provided: Short Span Support: Short Span Span: Long Span Support: Long Span Span: 12 12 12 10 Dia at Dia at Dia at Dia at 150 200 200 200 c/c c/c c/c c/c Check for Deflection: Basic L/d = 26 (Clause 23.6 565.1 of IS 456-2000) Modification factor= 2 ( Figure 4 of IS 456-2000) d req as per deflection control=Lx/(Basic L/d x Modification factor )= d required < d provided so.452 % Beta= 6. OK Check for Shear: Shear Force Vu= Factor x w x Lx/2= 21 kN N/mm2 Nominal Shear Stress=Vu/bd= 0. Sheet1 Page 3 . Sheet1 2 4 6 8 Explanation: ux106/(1000xd2) m charts of SP-16. Page 4 . Sheet1 Page 5 . Sheet1 Page 6 . DALAL CONSULTANTS ENGINEERS LIMITED 12/29/2013 For Cantilever Slab.20 5.5 12 628 12 200 LONG SPAN SPAN Required Provided 10 436 10 200 treq SUPPORT Required Provided 12 628 12 150 SUPPORT Required Provided 12 628 12 200 9 Two Way Slab: One Way Slab: Cantilever Slab: 1 to 9 as per code 5 for Intermediate panel 7 for End Panel 9 for Simply Supported 10 Page 7 0.12 .8 25 Cover 25 WL WF Boundary treq tprov Live Finish Condition initial Kn/m Kn/m 4 1 1 121 1 2 3 4 5 6 7 8 Boundary Conditions: REINFORCEMENT SHORT SPAN final SPAN Required Provided 150 86.Parapet Wall Details: Wall at the end of Wall Height: Cantilever slab Wall Thk: TWO WAY slab Fck:Lx Lz SHORT m LONG m 3.9 0. 5 0 2 0.125 10 0. 360 C/C 10 fs 0.05 ay support = 0.032 ay span = 0.55 1.526848 0.093 0.064 0.079 4 0.232 6.6 565.3008 3.232 6.06125 Page 8 .6 2 1.0833 0.4 1.083 9 0 0.0625 7 0.075 #N/A 0.2 4.25 #N/A 0.206438 281 C/C.08575 5 0.125 25 180 180 180 180 Finishing dl w wu Fck Ast req Ast req Ast req Ast req fs l 132.5 1.9936306 2 ax support = 0.5 2 1.81 127.538 26 LL 4 1 3.45216 Mu/Bd2 0.7 1.048 Ast 155.066 120 145 190 240 290 lambda 500 753.1824 4.0613 ax span = 0.2 392.2 2 2 2 1.4 2 2 1.024 SLAB: REINFORCEMENT DETAILS CONCRETE GRADE fck= STEEL GRADE fy = B D 150 150 150 150 1000 1000 1000 1000 REQUIRD COMBINE Fy Ast pro Ast pro Ast pro Ast pro 133 pt Mu 8.124 0.32914 115.56 150 1 8.Sheet3 TWO WAY SLAB: Lx(Short Span) Lz(Long Span) Aspect ratio slab th(ini) slab th(pro) Boundary condition Mu SUPP(short) Mu SPAN (short) Mu SUPP(long) Mu SPAN(long) Thickness Req 3200 5800 1.35 1.7 1.395674 0.25 1.813 #N/A pt 0.3 2 2 1.2256 86.5 25 500 d 125 125 125 125 8 TOR 8 1.0925 #N/A Support Span 1 0.85 1.2256 @ 5 0.3008 3.925613 MAXIMUM SPACING: 0.1 0.2 565.90562 80.75 8.75 13.275251 0.15 1 #N/A 6 0 7 0.162894 59.15 #N/A 5 0.065 3 0.8 1.9 1.4 0. edge.057 0.0645 0.043 Short Span Coefficients (Values of ly/lx) 1 1 2 3 4 5 6 Interior Panels Negative moment at conti.048 0.052 0.032 0. Positive moment at Mid-span Two Long Edges Disconti nuous.3 0.035 0.043 0. Negative moment at conti. edge.2 1.035 0.045 0.036 0.045 0.033 0.036 0.037 0.035 0.028 0.037 0.053 0. Positive moment at Mid-span Two Adjacen t Edges Disconti nuous. 0.032 0.052 0.024 0.049 0.037 0.04 0. Negative moment at conti.035 0.037 0.0605 0. edge. edge.06 0.028 0.045 0. 0.082 0. Positive moment at Mid-span Two Short Edges Disconti nuous.028 0.047 0.028 0.044 0.049 0.049 0.04975 0 0.028 Types of Panels 0.039 0.037 0.039 0. Positive moment at Mid-span One Short Edge Disconti nuous.04 0.043 0.07 0 0.044 0. edge.035 Moments considered 0.037 0.032 1.Sheet3 0.046 0.1 1.024 Case no.065 0.056 0. Negative moment at conti. Negative moment at conti.032 0.047 0.047 0. edge.051 0.043 0 0 0 0 Page 9 . Positive moment at Mid-span One Long Edge Disconti nuous. Negative moment at conti. Positive moment at Mid-span 0.048 0.059 0.043 0.076 0.072 0.056 0. Negative moment at conti. edge.065 0 0 0 0 0.051 0.057 0.064 0.035 0.071 0. Negative moment at conti.Sheet3 Positive moment at Mid-span 7 8 9 One Long Edge continu ous.057 0 0 0 0 0.057 0. Positive moment at Mid-span One Short Edge continu ous. Positive moment at Mid-span Four Edges Disconti nuous.043 0.053 0.043 0. edge.079 Page 10 .064 0. edge. Negative moment at conti.051 0. 55 1.9 1.2 1 0.9 #N/A 1 1.75 2 0.1 0.7 1.6 1.35 1.05 0.25 8 0 9 0 Page 11 .8 1.95 #N/A 0.Sheet3 1 2 3 4 5 6 7 8 9 Ast min 180 180 180 180 375 0.68 1.4 1.3 1.8 1.85 #N/A 1. 051 0.052 0.063 0.057 0.065 0.065 0.075 0.053 0.059 0.047 0.028 0.069 0.043 0.068 0.057 0.051 0.10175 0 0.06 0.044 0.5 1.048 0.037 0.069 0 0.049 0.06 0.035 0.063 0.056 0.035 0 0 0 0 0.065 0.039 0.041 0.045 0.028 0.041 0.024 0.049 0.045 0.037 0.4 1.071 0.059 0.085 0.045 Page 12 .091 0.75 2 ly/lx 0.067 0.044 0.064 0.053 0.Sheet3 0.056 Coefficient s for all values of Short Span Coefficients (Values of ly/lx) 1.077 0.052 0.032 0.08925 0.047 0.055 0.084 0. 085 0.Sheet3 0.087 0.107 0.06 0.035 0.073 0.084 0.043 0 0 0 0 0 0.096 0.043 0 0 0 0 0.057 0.063 0.076 0.068 0.1 0.088 0.069 0.08 0.064 0.056 Page 13 .091 0.097 0 0.071 0.089 0.08 0.