A 3.5 m square footing is proposed to be used to support a 328 mm x 328 mm RC column loaded with 815 kN dead load and 770 kN live load. The bottom of the footing is 2 m below the ground. Assume soil weighs 19 kN/m3 and the allowable soil bearing pressure is 314 kPa. The thickness of the footing is 553 mm. f'c = 21 MPa and fy = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m3 as the unit weight of concrete.  Use an effective depth measured from the top of the footing until the center of the bottom-most bar (d1) Calculate the number of bars required in one direction.

Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter16: Soil Bearing Capacity For Shallow Foundations
Section: Chapter Questions
Problem 16.13P: A square footing (B B) must carry a gross allowable load of 1160 kN. The base of the footing is to...
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A 3.5 m square footing is proposed to be used to support a 328 mm x 328 mm RC column loaded with 815 kN dead load and 770 kN live load. The bottom of the footing is 2 m below the ground. Assume soil weighs 19 kN/m3 and the allowable soil bearing pressure is 314 kPa. The thickness of the footing is 553 mm. f'c = 21 MPa and fy = 420 MPa. It is to be reinforced with 20 mm diameter. Use 24 kN/m3 as the unit weight of concrete. 

Use an effective depth measured from the top of the footing until the center of the bottom-most bar (d1)

Calculate the number of bars required in one direction. 

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