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A continuous-strip wall footing is shown in cross section in Fig. P5.5. It is proposed that tensile reinforcement be provided using No. 8 (No. 25) bars at 16 in. spacing along the length of the wall, to provide a bar area of 0.59 in²/ft. The bars have strength f, = 60,000 psi, and the footing concrete has f' = 4000 psi. The critical section for bending is assumed to be at the face of the supported wall, and the effective depth to the tensile steel is 12 in. Check to ensure that sufficient development length is available for the No. 8 (No. 25) bars, and if hooks are required, sketch details of the hooks, giving dimensions. Note: If hooks are required for the No. 8 (No. 25) bars, prepare an alternate design using bars having the same area per foot but of smaller diameter such that hooks could be eliminated; use the largest bar size possible to minimize the cost of steel placement. 66"- 12" 27"- 27"- Wall 12" 16" Page 227 / 813 No. 8 (No. 25) bars at 16" spacing

A continuous-strip wall footing is shown in cross section in Fig. P5.5. It is proposed that tensile reinforcement be provided using No. 8 (No. 25) bars at 16 in. spacing along the length of the wall, to provide a bar area of 0.59 in²/ft. The bars have strength f, = 60,000 psi, and the footing concrete has f' = 4000 psi. The critical section for bending is assumed to be at the face of the supported wall, and the effective depth to the tensile steel is 12 in. Check to ensure that sufficient development length is available for the No. 8 (No. 25) bars, and if hooks are required, sketch details of the hooks, giving dimensions. Note: If hooks are required for the No. 8 (No. 25) bars, prepare an alternate design using bars having the same area per foot but of smaller diameter such that hooks could be eliminated; use the largest bar size possible to minimize the cost of steel placement. 66"- 12" 27"- 27"- Wall 12" 16" Page 227 / 813 No. 8 (No. 25) bars at 16" spacing

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A continuous-strip wall footing is shown in cross section in Fig. P5.5. It is proposed that tensile reinforcement be provided using No. 8 (No. 25) bars at 16 in. spacing along the length of the wall, to provide a bar area of 0.59 in²/ft. The bars have strength f, = 60,000 psi, and the footing concrete has f' = 4000 psi. The critical section for bending is assumed to be at the face of the supported wall, and the effective depth to the tensile steel is 12 in. Check to ensure that sufficient development length is available for the No. 8 (No. 25) bars, and if hooks are required, sketch details of the hooks, giving dimensions. Note: If hooks are required for the No. 8 (No. 25) bars, prepare an alternate design using bars having the same area per foot but of smaller diameter such that hooks could be eliminated; use the largest bar size possible to minimize the cost of steel placement. 66"- 12" 27"- 27"- Wall 12" 16" Page 227 / 813 No. 8 (No. 25) bars at 16" spacing
Transcribed Image Text:A continuous-strip wall footing is shown in cross section in Fig. P5.5. It is proposed that tensile reinforcement be provided using No. 8 (No. 25) bars at 16 in. spacing along the length of the wall, to provide a bar area of 0.59 in²/ft. The bars have strength f, = 60,000 psi, and the footing concrete has f' = 4000 psi. The critical section for bending is assumed to be at the face of the supported wall, and the effective depth to the tensile steel is 12 in. Check to ensure that sufficient development length is available for the No. 8 (No. 25) bars, and if hooks are required, sketch details of the hooks, giving dimensions. Note: If hooks are required for the No. 8 (No. 25) bars, prepare an alternate design using bars having the same area per foot but of smaller diameter such that hooks could be eliminated; use the largest bar size possible to minimize the cost of steel placement. 66"- 12" 27"- 27"- Wall 12" 16" Page 227 / 813 No. 8 (No. 25) bars at 16" spacing
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