1. The steel column shown supports an axial compres- sive load of 105 kip. The allowable compressive stress in the steel is 20.5 ksi, and the allowable bearing stress in the concrete footing is 700 psi. (a) Determine the required cross-sectional area of the column. (b) If this column will be made of standard-weight steel pipe, se- lect the smallest nominal diameter that may be used. (c) For the pipe size selected in compute the actual stress developed in the column. (d) Calculate the re- quired length of the steel base plate if the width of this plate is 10 in. P - Steel column Steel base plate Concrete PROB. 10.35 2. Two 3/8 x 6-in. plates are joined by 3/4-in .- diameter rivets as shown. Determine the maximum al- lowable load P on the plates if the allowable stress in tension is 22 ksi, the allowable stress in shear is 29 ksi, and the allowable stress in bearing is 58 ksi. 11/2 in. + P. 6 in. 3 in. >P 1 + 1 11/2 in. 3/8 in. 1 P 1 -P 3/4-in .- diameter rivets