Author: Anonymous

A wall footing has the following conditions. Determine the minimum cross-sectional area of the reinforcement. Assume the footing is 4 ft wide and the pressure that acts on the bottom of the footing is 4,599 psf.The bottom of the footing is at a depth of 3 ft below grade.The service dead load is 6 kips/ft, and the service live load is 7 kips/ft.The wall is 14 in. thick.The footing is 11 in. thick.The allowable soil pressure, qa, is 4,600 psf.The soil has a density of 115 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 3,200 psi and fy = 60,000 psi.

A wall footing has the following conditions. Determine the depth, d, of the reinforcement. Assume the footing is 3 ft wide, the pressure that acts on the bottom of the footing is 7,066 psf, and the reinforcement is a #9 bar spaced every 12 inches.The bottom of the footing is at a depth of 5 ft below grade.The service dead load is 7 kips/ft, and the service live load is 8 kips/ft.The wall is 16 in. thick.The footing is 11 in. thick.The allowable soil pressure, qa, is 5,800 psf.The soil has a density of 130 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 3,600 psi and fy = 60,000 psi.

A wall footing has the following conditions. Determine the required development length, ld, for the reinforcement. Assume the footing is 4 ft wide, the pressure that acts on the bottom of the footing is 5,400 psf, and the reinforcement is a #9 bar spaced every 12 inches.The bottom of the footing is at a depth of 4 ft below grade.The service dead load is 10 kips/ft, and the service live load is 6 kips/ft.The wall is 10 in. thick.The footing is 13 in. thick.The allowable soil pressure, qa, is 4,500 psf.The soil has a density of 130 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 3,300 psi and fy = 60,000 psi.

A wall footing has the following conditions. Determine the minimum width of the footing.The bottom of the footing is at a depth of 2 ft below grade.The service dead load is 6 kips/ft, and the service live load is 8 kips/ft.The wall is 14 in. thick.The footing is 10 in. thick.The allowable soil pressure, qa, is 4,800 psf.The soil has a density of 110 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 3,500 psi and fy = 60,000 psi.

A wall footing has the following conditions. Determine the minimum cross-sectional area of the reinforcement. Assume the footing is 4 ft wide and the pressure that acts on the bottom of the footing is 5,600 psf.The bottom of the footing is at a depth of 2 ft below grade.The service dead load is 8 kips/ft, and the service live load is 8 kips/ft.The wall is 12 in. thick.The footing is 13 in. thick.The allowable soil pressure, qa, is 4,600 psf.The soil has a density of 130 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 4,000 psi and fy = 60,000 psi.

A wall footing has the following conditions. Determine the pressure that acts on the bottom of the footing. Assume the footing is 5 ft wide.The bottom of the footing is at a depth of 2 ft below grade.The service dead load is 11.7 kips/ft, and the service live load is 7.4 kips/ft.The wall is 14 in. thick.The footing is 15 in. thick.The allowable soil pressure, qa, is 5,000 psf.The soil has a density of 130 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 3,100 psi and fy = 60,000 psi.

A wall footing has the following conditions. Determine the pressure that acts on the bottom of the footing. Assume the footing is 4 ft wide.The bottom of the footing is at a depth of 4 ft below grade.The service dead load is 6.3 kips/ft, and the service live load is 7.8 kips/ft.The wall is 14 in. thick.The footing is 13 in. thick.The allowable soil pressure, qa, is 4,400 psf.The soil has a density of 115 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 4,000 psi and fy = 60,000 psi.

A wall footing has the following conditions. Determine the critical bending moment, Mu, at the face of the wall. Assume the footing is 3 ft wide and the pressure that acts on the bottom of the footing is 6,666 psf.The bottom of the footing is at a depth of 2 ft below grade.The service dead load is 6 kips/ft, and the service live load is 8 kips/ft.The wall is 12 in. thick.The footing is 14 in. thick.The allowable soil pressure, qa, is 5,100 psf.The soil has a density of 120 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 3,900 psi and fy = 60,000 psi.

Use the interaction diagrams found in Appendix A of the textbook to determine whether the following rectangular tied column with bars in 4 faces can safely support a load of Pu = 84 kip and Mu = 67.2 kip-ft.b = 14 in.h = 12 in.fc’ = 4 ksify = 60 ksiγ = 0.75ρg = 0.02

A wall footing has the following conditions. Determine how much greater the factored load is than the unfactored load.The bottom of the footing is at a depth of 5 ft below grade.The service dead load is 9.8 kips/ft, and the service live load is 6.4 kips/ft.The wall is 12 in. thick.The footing is 16 in. thick.The allowable soil pressure, qa, is 6,000 psf.The soil has a density of 125 lb/ft3.The concrete has a density of 150 lb/ft3.The concrete cover has a thickness of 3 in.f’c = 3,800 psi and fy = 60,000 psi.