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A steel column must support a 20' by 25' tributary area of formwork for a 6 slab of normal weight concrete. Assuming the forms add
A steel column must support a 20' by 25' tributary area of formwork for a 6" slab of normal weight concrete. Assuming the forms add 3 psf to the weight and considering an additional 50 psf construction live load, select the lightest square or round HSS section to support this load. The column is 12 ft long and simply supported at top and bottom.
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