Date : 11-01-2021
Prepared : NKT
STRUCTURAL CALCULATION REPORT
Checked : SMIT
Doc. No. : 2008-STR-PTU-CAL-01
Design of Footing F1
Details of columns
Grade of concrete fck = 30
Grade of steel fy = 500
Longer dimension of column along x-axis Cx (mm) = 300
Shorter dimension of column along z-axis Cz (mm) = 300
Bar dia1 to be used in column (min 12mm) = 12
No of bars used in column = 8
Bar dia2 to be used in column (min 12mm) = 12
No of bars used in column = 8
Details of footings
Ftg type Type = square
Grade of concrete fck = 30
Grade of steel fy = 500
Unit wt of concrete wc (T/m3) = 2.5
Clear cover at bottom for ftg = 75
Clear cover at sides for ftg = 50
Dist of top concrete edge from face of column a (mm) = 25
Density of soil ds (T/m3)= 1.8
Co-efficient of friction against sliding m= 0.5
Factor of safety against sliding FSs = 1.4
Factor of safety against overturning FSo = 1.4
Depth of bottom of ftg Hs (m) = 1.5
Assume wt of ftg (% of column load) = 10
Design data
Net SBC of soil at bottom of ftg SBC (T/m 2) = 14
Bar dia to be used along x-axis (min 10mm) = Y10
Bar dia to be used along z-axis (min 10mm) = Y10
Provide footing dimensions
Length of ftg along x-axis Fx (mm) = 1250
Length of ftg along z-axis Fz (mm) = 1250
Thk of ftg at column face Tfc (mm) = 400
Thk of ftg at edge Tf (mm) = 200
Ok
Load Calculation
Fotting Concrete m3= 0.454
Weight of footing T= 1.135
Ultimate Pressure due to self weight T/m2 = 1.090
Net ultimate design pressure Pnet = 18.49
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Date : 11-01-2021
Prepared : NKT
STRUCTURAL CALCULATION REPORT
Checked : SMIT
Doc. No. : 2008-STR-PTU-CAL-01
Reinforcement Calculation_ ( Short side )
Moment at face of support Mc (T-m) = 1.87
Mc /bd2 = 0.18
% steel required along short direction Pt = 0.04
Ast required along short direction Ast (mm2) = 133.38
Minimum Ast required along short direction Astmin (mm2) = 360.00
Size of reinforcement (mm) = Y10
Spacing of Reinforcement (mm) = 218
Provide Spacing of Reinforcement (mm) = 150
Reinforcement Calculation_ ( Long side )
Moment at face of support Mc (T-m) = 1.87
Mc /bd2 = 0.18
% steel required along short direction Pt = 0.04
Ast required along short direction Ast (mm2) = 133.38
Minimum Ast required along short direction Astmin (mm2) = 360.00
Size of reinforcement (mm) = Y10
Spacing of Reinforcement (mm) = 218
Provide Spacing of Reinforcement (mm) = 150
One way Shear check
Along short side
Critical depth dcr (mm) = 188
Critical width bcr (mm) = 950
Cross section area for shear Ah (mm2)= 165000
Cross section area at critical section Acr (mm2) = 178750
tanβ = 0.42
Moment at critical section Mcr (T-m) = 0.21
Shear force Vu (T) = 2.54
Nominal shear stress τv (N/mm2) = 0.14
Ast provided along short direction Ast pro (mm2) = 523.60
% steel provided along short direction Pt pro = 0.16
Design shear strength of concrete τc (N/mm2) = 0.30
Check O.K
Along long side
Critical depth dcr (mm) = 188
Critical width bcr (mm) = 950
Cross section area for shear Ah (mm2)= 165000
2
Cross section area at critical section Acr (mm ) = 178750
tanβ = 0.42
Moment at critical section Mcr (T-m) = 0.21
Shear force Vu (T) = 2.54
Nominal shear stress τv (N/mm2) = 0.14
2
Ast provided along short direction Ast pro (mm ) = 523.60
% steel provided along short direction Pt pro = 0.16
Design shear strength of concrete τc (N/mm2) = 0.30
Check O.K
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