Design a reinforced concrete section that can carry a factored moment of 260 K⋅ft as:            a. Singly reinforced, b=10 in.            b. Doubly reinforced, 25% of the moment to be resisted by compression steel, b=10 in.            c. T-section, which has a flange thickness of 3 in, flange width of 20 in, and web width of 10 in.            Then f ‘c = 3ksi and fy = 60 ksi for all problems.            Determine the quantities of concrete and steel designed per foot length of beams. Also, determine the cost of each design if the price of the concrete equals $50/yd3 and that of steel is $0.30/lb. Tabulate and compare results.

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Design criteria for structural loading

The different loads such as loads due to self-weight (dead load) and external loads such as live load, wind loads, seismic load, snow load, and other loads and load combinations that influence the design of a building are called structural loading. The nature of the applied load differs from changes in the location, design, and type of materials used. The design criteria require that structures must be designed and constructed to be able to withstand all load types that are expected to act upon the structure and render its usage for the designated purpose. The structural members such as beams, slabs, columns, and foundations help the structure to withstand the applied load. There are different institutes such as ASCE and ACI that provide building design codes to assure minimum safety requirements and quality of the structures.