10.24 A portable storage bin whose total weight is 18,000 lb is to be supported on four short legs made of L2 X 2 X 1/8 steel angle (see Table A.6

of the Appen- dix) as shown in Prob. 10.26(a). a. Assuming that one-fourth of the total bin weight is carried by each leg, find the compressive stress developed in the steel. b. If the maximum allowable compressive stress in this steel is 12 ksi, what is the maximum allowable bin weight? c. The bin will rest on a concrete floor for which the allowable bearing stress is 950 psi. To achieve that stress, a square metal plate is to be welded to the bottom of each leg, changing its "footprint" from that of Prob. 10.26(b) to that of Prob. 10.26(c). Determine the minimum side dimension, d, of these plates for the bin weight computed in (b). Steel angle L2x 2 x 1/8 steel angle (b) PROB. 10.24 ZZX Steel angle d