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A wall footing has the following conditions. Determine the pressure that acts on the bottom of the footing. Assume the footing is 3 ft wide.The bottom of the footing is at a depth of 2 ft below grade.The service dead load is 9.6 kips/ft, and the service live load is 6.2 kips/ft.The wall is 12 in. thick.The footing is 16 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.

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 = 364 kip and Mu = 788.7 kip-ft.b = 28 in.h = 26 in.fc’ = 4 ksify = 60 ksiγ = 0.75ρg = 0.03

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 = 648 kip and Mu = 151.2 kip-ft.b = 18 in.h = 12 in.fc’ = 4 ksify = 60 ksiγ = 0.75ρg = 0.01

A wall footing has the following conditions. Determine the critical bending moment, Mu, at the face of the wall. Assume the footing is 5 ft wide and the pressure that acts on the bottom of the footing is 5,840 psf.The bottom of the footing is at a depth of 4 ft below grade.The service dead load is 15 kips/ft, and the service live load is 7 kips/ft.The wall is 10 in. thick.The footing is 16 in. thick.The allowable soil pressure, qa, is 5,300 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 = 3,000 psi and fy = 60,000 psi.

Determine the maximum axial strength φPn,max for the following tied column.Column width, b = 24 in.Column thickness, h = 18 in.Number of longitudinal bars = 8Size of longitudinal bars = No. 6Size of ties = No. 3Concrete strength = 7,000 psiYield strength of longitudinal bars = 60,000 psiYield strength of ties = 60,000 psi

Determine the maximum pitch, s, for the spirals in the following circular column.Column diameter, h = 24 in.Clear cover to spirals = 1.5 in.Number of longitudinal bars = 15Size of longitudinal bars = No. 10Size of spiral = No. 3Concrete strength = 5,000 psiYield strength of longitudinal bars = 60,000 psiYield strength of spiral = 60,000 psi

Determine the maximum pitch, s, for the spirals in the following circular column.Column diameter, h = 18 in.Clear cover to spirals = 1.5 in.Number of longitudinal bars = 9Size of longitudinal bars = No. 9Size of spiral = No. 4Concrete strength = 6,500 psiYield strength of longitudinal bars = 60,000 psiYield strength of spiral = 60,000 psi

Determine the maximum axial strength φPn,max for the following circular spiral column.Column diameter, h = 18 in.Number of longitudinal bars = 16Size of longitudinal bars = No. 8Size of spirals = No. 4Concrete strength = 7,500 psiYield strength of longitudinal bars = 60,000 psiYield strength of spirals = 60,000 psi

Determine the maximum axial strength φPn,max for the following circular spiral column.Column diameter, h = 20 in.Number of longitudinal bars = 9Size of longitudinal bars = No. 6Size of spirals = No. 4Concrete strength = 8,500 psiYield strength of longitudinal bars = 60,000 psiYield strength of spirals = 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 2 faces can safely support a load of Pu = 336 kip and Mu = 336.0 kip-ft.b = 28 in.h = 12 in.fc’ = 4 ksify = 60 ksiγ = 0.6ρg = 0.05