A slab panel is carrying a superimposed dead load of 2.70 kPa and superimposed live load of 6.0 kPa all over the 4.0 m x 18 m light storage area. The slab is restrained. The concrete to be used has strength of 28 MPa (normal weight). The main reinforcement has yield strength of 350 MPa. Use concrete cover of 20 mm. The thickness uses a multiple of 10 mm. The main reinforcement used is 16 mm in diameter. The shrinkage and temperature reinforcement used is 12 mm in diameter. The unit weight of concrete is 23.6 kN per cubic meter. Using USD, Determine the spacing of 12 mm main rebar at the midspan

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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.