A spirally reinforced concrete column of size 400 mm diameter is subjected to a factored axial load of 1500 kN. The column has an unsupported length of 3.4 m and is effectively held in position at both ends, but not restrained against rotation. The reinforcement to be provided in the column using M25 grade concrete and Fe415 grade steel is (neglect steel area in compression)

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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.