6 ft 6 ft 5 kip Prob. 4-25 4-26. The truss consists of three members, each made from A-36 steel and having a cross-sectional area of 0.75 in². Determine the greatest load P that can be applied so that the roller support at B is not displaced more than 0.03 in. 4-27. Solve Prob. 4-26 when the load P acts vertically downward at C. C P 16 ft 16 ft 16 ft Probs. 4-26/27 B