1. Figure 1 shows a portion of the third floor office plan of the federal building in downtown Denver. The beams and girders are simply supported and support a 4 in. thick concrete floor slab. Assume the self-weight of the beams and girders is 68 Ibf. Find the maximum bending moments at ultimate conditions in beam BI and girder GI. Consider movcable partition as part of dead loads. Hint: i) girder Gl supports beams BI and B2 only; ii) dead loads consist of slab, partition, and beam/girder. CY Hi 40 150 Selumas 24 (3 + 130 13 Fig. 1. Federal building in downtown Denver