![]() Stirrup rings – T8mm dia bars 6″ (150mm) spacing.Main reinforcement – 6 bars of 12mm dia Fe 500 Steel.Recommended grade of concrete for building construction is M20 grade, which is in the ratio of 1 : 1.5 : 3 (1 part of cement and 1.5 part of sand and 3 parts of coarse aggregate with 0.5 parts of water).īelow is the summary of the standard size of column used in 2021. Nowadays minimum size of column used in construction irrespective of small building is 9″ X 12″ (225mm X300mm). ![]()
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