[10] 1. Figure 1 shows a portion of the 2nd floor office plan of the North Classroom building at the University of Colorado Denver. The beams and girders are assumed

to be simply-supported and support a 4 in. thick concrete floor slab. Design beam B1 as a singly reinforced rectangular concrete beam,assuming f'e = 5,000 psi and f, = 60 ksi. The following is assumed: Partition = 15 psf and Floor finish including all ceiling works = 14 psf (hint: dead loads = self-weight of the slab and the beam, partition,and floor finish)