please do problem 9.15 and please use the hints as a guide

hint:

9.15. Using the column interaction diagrams in Appendix A f = 4000 with Pt approximately equal to 0.02, design square columns with equal reinforcement on all sides to carry each of the following loads and select the longitudinal and transverse reinforcement: (a) (b) Pu = 2500 kips and Mu = 220 ft-kips Put = 1500 kips and M. = 330 ft-kips Pu = 600 kips and Mu = 180 ft-kips (c) A o 9.15 . a) try h = 30"; e/h = 0.032, y = 0.833, P,-0.0205 12 #11 should work; check tie spacing (smallest of three values) . b) try h = 20"; e/h = 0.132, y = 0.75, Pg 0.024 8 #10 should work; check tie spacing . c) try h= 18"; e/h = 0.2133, y = 0.722; Pg0.706 8 #9 should work; check tie spacing 9.15. Using the column interaction diagrams in Appendix A f = 4000 with Pt approximately equal to 0.02, design square columns with equal reinforcement on all sides to carry each of the following loads and select the longitudinal and transverse reinforcement: (a) (b) Pu = 2500 kips and Mu = 220 ft-kips Put = 1500 kips and M. = 330 ft-kips Pu = 600 kips and Mu = 180 ft-kips (c) A o 9.15 . a) try h = 30"; e/h = 0.032, y = 0.833, P,-0.0205 12 #11 should work; check tie spacing (smallest of three values) . b) try h = 20"; e/h = 0.132, y = 0.75, Pg 0.024 8 #10 should work; check tie spacing . c) try h= 18"; e/h = 0.2133, y = 0.722; Pg0.706 8 #9 should work; check tie spacing