Using the tributary area method, compute the floor dead loads supported by columns A1 and B2 in Figure 2.4. The floor system consists of a 6-in.-thick reinforced concrete slab weighing 75 lb/ft². Allow 15 lb/ft² for the weight of floor beams, utilities, and a ceiling suspended from the floor. The precast exterior wall supported by the perimeter beams weighs 600 lb/ft.

Figure 2.4

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2 2 T 18' 18' A I- 20' 10' 10' panel B 22' 22 III 11' panel panel D -I 9' 9' 9' 9' panel panel