structural/civil engineer's building structure column checks ( structural design )

7/29/2019 Structural/Civil Engineer's Building Structure Column Checks ( structural design )

1/10

TIMES LENGTH WIDTH DEPTH DENSITY

DEAD LOADS

roof 1 5.5 6

Ceiling 1 5.5 6

Beam filling 0 0 0.23 0.35 20

R/B Ring Beam 1 9 0.23 0.35 25

Walls first flr(230TH) 0 19 0.23 3 20

Walls grnd flr 0 9 0.23 3 20

Slab(Ribbed) 0.5 5.5 6

1 Beam 0.5 19 0.23 0.25 25

1 slab Beam 0 0 0 0 25

Grd Beam 0 19 0.23 0.3 25

Column 1 12 0.23 0.23 25

Back fill 1 1.75 1.75 1.5 18

Pad 1 1.75 1.75 0.45 24

Total

LIVE LOADS

Roof 1 5.5 6

Floors(Ribbed) 0.5 5.5 6

Total

GRAND TOTAL

Bearing Capacity

180

PAD DESIGN

fy N/mm2

460.0

fcu N/mm2

25.0

cover to main bars mm 50

assumed re-bar dia mm 16

Col design load kN 288.39

earth pressure kN/m2

40

d mm 376

shear stress

at col face, vcol N/mm2

0.83

0.8SQRTfcu N/mm2

4.0

OK

critical perimeter mm 5,512area within perimeter mm

21,898,884

punching shear force, V kN 213

punching shear stress, v N/mm2

0.10

Allowable shear stress vc N/mm2

0.360

OK

Half base less half column 1.2

Mat column face kN m 81


2/10

Mu kN m 1,489

A s mm2

522

minimum A s mm2

1,580

A s provided mm2

2,510

Provide 8T20@370cc

(100As/bd) 0.247

Allowable shear stress vc N/mm2 0.360

OK

at critical shear section, m 0.859

V kN 92

v N/mm2

0.09

OK
mailto:8T20@370ccmailto:8T20@370cc


3/10

UNIT LOAD TOTAL LOAD Factored

kN/m2

KN

0.6 20

0.6 20

0

18

0

0

4.34 72

14

0

0

16

83

33

275 159

222.38825

0.25 8

2 33

41 66 41

66

316 66.0 288.38825

Pad Area Side req'd side provided

1.75478472 1.325 2.70
mailto:kN%5e&*%25$$#@!@%22%7C?//mailto:kN%5e&*%25$$#@!@%22%7C?//mailto:kN%5e&*%25$$#@!@%22%7C?//mailto:kN%5e&*%25$$#@!@%22%7C?//


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6/10

TIMES LENGTH WIDTH DEPTH DENSITY

DEAD LOADS

roof 1 5.5 6

Ceiling 1 5.5 6

Beam filling 0 0 0.23 0.35 20

R/B Ring Beam 1 9 0.23 0.35 25

Walls first flr(230TH) 1 19 0.23 3 20

Walls grnd flr 0 9 0.23 3 20

Slab(Ribbed) 1 5.5 6

1 Beam 1 19 0.23 0.25 25

1 slab Beam 0 0 0 0 25

Grd Beam 0 19 0.23 0.3 25

Column 1 12 0.23 0.23 25

Back fill 0 1.75 1.75 1.5 18

Pad 0 1.75 1.75 0.45 24

Total

LIVE LOADS

Roof 1 5.5 6

Floors(Ribbed) 2 5.5 6

Total

GRAND TOTAL

Bearing Capacity

250

PAD DESIGN

fy N/mm2

460.0

fcu N/mm2

25.0

cover to main bars mm 50

assumed re-bar dia mm 16

Col design load kN 933.24

earth pressure kN/m2

128

d mm 376

shear stress

at col face, vcol N/mm2

2.70

0.8SQRTfcu N/mm2

4.0

OK

critical perimeter mm 5,512area within perimeter mm

21,898,884

punching shear force, V kN 690

punching shear stress, v N/mm2

0.33

Allowable shear stress vc N/mm2

0.360

OK

Half base less half column 1.2

Mat column face kN m 264


7/10

Mu kN m 1,489

A s mm2

1,689

minimum A s mm2

1,580

A s provided mm2

2,510

Provide 8T20@370cc

(100As/bd) 0.247

Allowable shear stress vc N/mm2 0.360

OK

at critical shear section, m 0.859

V kN 297

v N/mm2

0.29

OK
mailto:8T20@370ccmailto:8T20@370cc


8/10

UNIT LOAD TOTAL LOAD Factored

kN/m2

KN

0.6 20

0.6 20

0

18

262

0

4.34 143

27

0

0

16

0

0

506 506

708.841

0.25 8

2 132

140 224.4 140

224.4

647 224.4 933.241

Pad Area Side req'd side provided

2.58626 1.608 2.70
mailto:kN%5e&*%25$$#@!@%22%7C?//mailto:kN%5e&*%25$$#@!@%22%7C?//mailto:kN%5e&*%25$$#@!@%22%7C?//mailto:kN%5e&*%25$$#@!@%22%7C?//


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structural/civil engineer's building structure column checks ( structural design )

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