HSS12x4x1/4 hollow structural section stringers frame into a W12x40 wide-flange steel beam and intersect with an HSS7x5x3/8 member at the stair bend. The assembly provides structural support for steel stair runs continuing upward and downward.
D1 SF532 DN UP TYP SD-5 D3 SF532 HSS12x4x1/4 STRINGER HSS12x4x1/4 STRINGER HSS7x5x3/8 HSS12x4x1/4 W12x40
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