A rectangular beam with width b = 610 mm, total depth h = 355 mm and effective depth to the tensile steel d = 290 mm, is constructed using materials with strengths fy = 415 MPa and fe = 34.6 MPa. Tensile reinforcement consists of two 36 mm bars plus three 32 mm bars in one row. Determine the depth of stress block (a).

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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.