Determine the maximum axial strength φPn,max for the following circular spiral column.Column diameter, h = 26 in.Number of longitudinal bars = 8Size of longitudinal bars = No. 9Size of spirals = No. 3Concrete strength = 7,500 psiYield strength of longitudinal bars = 60,000 psiYield strength of spirals = 60,000 psi

Determine the required splice length for the longitudinal bars in the following tied column. Assume that all of the longitudinal bars are in compression and that you will use a contact lap splice. Do not incorporate a reduction in length due to ACI 318-14 Section 10.7.5.2.1.Column width, b = 24 in.Column thickness, h = 28 in.Clear cover to ties = 1.5 in.Number of longitudinal bars = 14Size of longitudinal bars = No. 9Size of ties = No. 4Concrete strength = 8,500 psiYield strength of longitudinal bars = 60,000 psiYield strength of ties = 40,000 psi

Determine the location of the neutral axis, c, for the following tied column when the largest strain in the concrete is 0.003 and the strain in the tension reinforcement is 0.003.b = 16 in.h = 24 in.Clear cover to ties = 1.5 in.Number of longitudinal bars = 6Size of longitudinal bars = No. 8Size of ties = No. 4Concrete strength = 4,500 psiYield strength of longitudinal bars = 60,000 psiYield strength of ties = 40,000 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 = 1,568 kip and Mu = 522.7 kip-ft.b = 16 in.h = 28 in.fc’ = 4 ksify = 60 ksiγ = 0.75ρg = 0.05

Determine the maximum axial strength φPn,max for the following tied column.Column width, b = 26 in.Column thickness, h = 18 in.Number of longitudinal bars = 12Size of longitudinal bars = No. 8Size of ties = No. 3Concrete strength = 3,000 psiYield strength of longitudinal bars = 60,000 psiYield strength of ties = 60,000 psi

Use the interaction diagrams found in Appendix A of the textbook to determine whether the following circular spiral column can safely support a load of Pu = 760 kip and Mu = 557.5 kip-ft.h = 22 in.fc’ = 4 ksify = 60 ksiγ = 0.9ρg = 0.02

Determine the maximum pitch, s, for the spirals in the following circular column.Column diameter, h = 20 in.Clear cover to spirals = 1.5 in.Number of longitudinal bars = 18Size of longitudinal bars = No. 8Size of spiral = No. 4Concrete strength = 8,000 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 = 22 in.Clear cover to spirals = 1.5 in.Number of longitudinal bars = 8Size of longitudinal bars = No. 8Size of spiral = No. 3Concrete strength = 5,000 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 tie column.Column diameter, h = 22 in.Number of longitudinal bars = 10Size of longitudinal bars = No. 8Size of ties = No. 4Concrete strength = 6,500 psiYield strength of longitudinal bars = 60,000 psiYield strength of ties = 60,000 psi

Compute the axial compressive strength Pn and moment capacity Mn of the following tied column when the largest strain in the concrete is 0.003 and the strain in the tension reinforcement is 0.003. Note that you should not include φ in the answer and that you should not consider Pn,max.b = 16 in.h = 22 in.Clear cover to ties = 1.5 in.Number of longitudinal bars = 6Size of longitudinal bars = No. 7Size of ties = No. 4Concrete strength = 6,000 psiYield strength of longitudinal bars = 60,000 psiYield strength of ties = 40,000 psi