minimum size of column for earthquake resistant design
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The process of designing a column begins with the selection of materials (such as concrete and steel bar grades), the shape and size of the cross-section, and the calculation of the amount and distribution of steel reinforcement. The first two components are part of the building’s broader design strategy.
Columns must be at least 300mm wide, according to the Indian Ductile Detailing Code IS:13920-1993. If the unsupported length is less than 4m and the beam length is less than 5m, a column width of up to 200mm is permitted. Columns that must withstand earthquake stresses must be built to avoid shear failure through careful reinforcing choices