The load carrying capacity of a 9″x9″ lumn with 4 bars of 12 MM steel rods upto a height of 10′, with M15 ncrete, is 30 Tons. That is the minimum, but in some practices, a minimum of 9″x12″ lumn is designed for slenderness ration factor. The design depends on a lot of factors, and is not black and white
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