Answered: A square footing is to support a 400mm…

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter10: Mat Foundations

Section: Chapter Questions

Problem 10.1P: Refer to the rectangular combined footing in Figure 10.1, with Q1 = 100 kip and Q2 = 150 kip. The...

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A square footing is to support a 400mm x 400mm tied column that carries a service dead load of 880 kN and a service live load of 710kN. The column is reinforced with 8-25 mm diameter bars. The base of the footing is 1.5 meter below the natural grade line where the soil bearing capacity is 235 kPa. The soil above has a unit weight of 15.6 kN/m³. Using fy=275 MPa, f’c=27.5 MPa, and unit weight of concrete of 23.5 kN/m³. Assume footing depth of 600 mm for soil bearing pressure. Use U = 1.2D + 1.6L

1. Determine the number of 25 mm diameter bars in one direction.

a. 10

b. 13

c. 8

d. 11

2. Determine the dowel requirement.

a. 180 mm

b. 220 mm

c. 200 mm

d. 190 mm

3. Determine the development length requirements.

a. 500 mm

b. 485 mm

c. 515 mm

d. 450 mm

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