a beam having b$=12$in$,$ and h$=24$in is reinforced with three no $11($no $36)$ bars. material strengths are fy$=60000$ psi and f$\text{'}$c$=4000$ psi. it is used on a $28$ ft simple span to carry a total service load of $2430$ lb$/$ft$.$ for this member, the sustained loads iinclude self$-$weight of the beam plus additional superimposed dead load of $510$ lb$/$ft$,$ plus $400$ lv$/$ft representing that part of the live load that acts more or less continuously, such as furniture, equipment, and time$-$average occupancy load.