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Design Force: Safe Safe

The document contains calculations to design the footing of a column, including checking the pressure on the footing, moments and shear forces, and reinforcement requirements. It analyzes the footing dimensions, soil properties, applied loads, and verifies that the calculated pressures, moments, and shear stresses are below the allowable limits for the given concrete and rebar grades. The design was found to be safe and meet all code requirements.

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URVESHKUMAR PATEL
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89 views7 pages

Design Force: Safe Safe

The document contains calculations to design the footing of a column, including checking the pressure on the footing, moments and shear forces, and reinforcement requirements. It analyzes the footing dimensions, soil properties, applied loads, and verifies that the calculated pressures, moments, and shear stresses are below the allowable limits for the given concrete and rebar grades. The design was found to be safe and meet all code requirements.

Uploaded by

URVESHKUMAR PATEL
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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Design force

L/C fx(kN) fy(kN) fz(kN) mx(kNm) my(kNm) mz(kNm)


0 72 0 250 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0

InpUt Check
Width of colUmn(b) 0.23 m 9 '' inch
Depth of colUmn(d) 0.45 m 18 '' inch
Width of footing(B) 2.75 m 9'2" feet&inch
Safe
Length of footing(L) 2.75 m 9'2" feet&inch
Thickness at edge(te) 0.50 m 20 '' inch X
Thickness near column(t) 0.50 m 20 '' inch Safe
offset from colUmn ( c ) 0.05 m 2 '' inch
SBC 150 kN/m2
Depth of footing below GL 3.50 m
Density of soil 18 kN/m2
Grade of steel 500 N/mm2
Grade of concrete 20 N/mm3
Clear cover 50 mm
Ast ll to B
Diameter 12 8
Spacing 125 5 '' inch OK 10
Ast ll to L 12
Diameter 12
Spacing 125 5 '' inch OK
Z

B = 2.75

d = 0.45
L = 2.75
b = 0.23 X

t = 0.5
t = 0.5
te = 0.5
InpUt
Width of colUmn(b) 0.23
Depth of colUmn(d) 0.45
Width of footing(B) 2.75 0.14
Length of footing(L) 2.75 7.5625
Thickness at edge(te) 0.5
Thickness near column(t) 0.5
offset from colUmn ( c ) 0.05
SBC 150
Depth of footing below GL 3.5
Density of soil 18
self weight of column 7.7625
selfweight of footing 94.53125
selfweight of soil 402.786

1 Check for pressure


p Mx Mz A Zx Zz Total p X
72.00 250.00 0.00 7.56 3.47 3.47 577.08 1.38
0.00 0.00 0.00 7.56 3.47 3.47 505.08 1.38
0.00 0.00 0.00 7.56 3.47 3.47 505.08 1.38
0.00 0.00 0.00 7.56 3.47 3.47 505.08 1.38
0.00 0.00 0.00 7.56 3.47 3.47 505.08 1.38
Z ex ez Corner 1 Corner 2 Corner 3 Corner 4
0.94 0.00 0.43 148.43 148.43 4.18 4.18
1.38 0.00 0.00 66.79 66.79 66.79 66.79
1.38 0.00 0.00 66.79 66.79 66.79 66.79
1.38 0.00 0.00 66.79 66.79 66.79 66.79
1.38 0.00 0.00 66.79 66.79 66.79 66.79
3.89
safe 0
148.43
4.18 148.43
safe 38.1668694181
0.0000
0

SBC check %contact area %contact y


213.00 safe
213.00 safe
213.00 safe
213.00 safe
213.00 safe
Grade of steel 500
Grade of concrete 25
Clear cover 50
Width of colUmn(b) 0.23
Depth of colUmn(d) 0.45
Width of footing(B) 2.75
Length of footing(L) 2.75
Thickness at edge(te) 0.5
Effective thickness 0.438
Thickness near column(t) 0.5
Effective thickness 0.438
maximum pressure 148.43
Net pressure 94.43 kN/m2
Moment along X dir. 94.43 1.15 62.44467 kNm
Moment along Z dir. 94.43 1.26 74.96194 kNm
Ast req. along X dir 531.89 mm2
Ast req. along Z dir 638.50 mm3

Ast ll to B 0
Diameter 12
Spacing 125
Ast provided 2486.88
Check OK
Ast ll to L 0
Diameter 12
Spacing 125
Ast provided 2486.88
Check OK

Check for one way shear


Critical setion depth 0.44
pt 0.206
b 14.059
tc 0.335 N/mm2
tv 0.230 N/mm2
OK
Critical setion depth 0.438
pt 0.206
b 14.06
tc 0.335
tv 0.266 N/mm2
OK
Check for two way shear
Critical setion depth 1 0.22
Critical setion depth 2 0.22
B1 0.888
L1 0.668
Perimeter 3.112
Punching load 658.142 kN
tv 0.483 N/mm2
tc 1.25 N/mm2
OK

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