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Prob. 5.1* Determine the ACI design moment capacity ?Mn of the beam shown in Fig. 5.1. Given: fc’ = 4000 psi, and fy = 60,000 psi. Fig. 5.1 5.2* Determine the ACI design moment capacity ?Mn of the beam shown in Fig. 5.2 if fc’ = 4000 psi, and fy = 60,000 psi. Fig. 5.2 5.3* Determine the ACI design moment capacity ?Mn of the beam shown in Fig. 5.3 if fc’ = 4000 psi, and fy = 60,000 psi. Fig. 5.3 5.4* Design a rectangular beam for a 22 ft simple span if a dead load of 1 k/ft (not including the beam weight) and a live load of 2 k/ft are to be supported. Use fc’ = 4000 psi, and fy = 60,000 psi. Draw the final section. 5.5* A rectangular beam is to be sized with fy = 60,000 psi, fc’ = 3000 psi, and ? equal to 0.18 fc’/ fy. It is to have a 25 ft simple span and to support a dead load in addition to its own weight equal to 2 k/ft and a live load equal to 3 k/ft. 5.6* Design a one way slab for the interior of a building using the span, loads, and other data given in Fig. 5.6. LL = 200 psf, fc’ = 4000 psi, fy = 60,000 psi 5.7* Determine the design moment capacity of the beam shown in Fig. 5.7. Given: fc’ = 3000 psi, fy = 60,000 psi. Fig. 5.7 5.8* A beam is limited to the dimensions shown in Fig. 5.8. If MD = 170 ft-k, ML = 225 ft-k, : fc’ = 4000 psi, fy = 60,000 psi. Select the reinforcing required. As’ 3” 15” 4” 16” 23” As Fig. 5.8
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