A reinforced concrete beam has a width of 300 mm and an overall depth of 480 mm. The beam is simply supported over a span of 5 m Steel strength fy = 415 MPa, and concrete strength fc= 28 MPa. Concrete cover is 70 mm from the centroid of the steel area. Únit weight of concrete is 23.5 kŇ/m^3. Other than the weight of the beam, the beam carries a superimposed dead load of 18 kN/m and a live load of 14 kN/m. Use the strength design method. a) Determine the maximum factored moment on the beam b) If the design ultimate moment capacity of the beam is 280 kN-m, determine the required mumber of 20 mm tension bars. c) If the beam will carnry a factored load of 240 kN at midspan, determine the required mumber of 20 mm tension bars.

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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.