A built-up channel stair stringer frames into a hollow structural section column sized per plan, featuring a 2-1/2 by 2-1/2 by 3/8-inch angle typically notched around the structural steel column. A second built-up channel is located beyond the connection, and an additional hollow structural section supports the floor assembly as specified in the stair plan. The stringer layout requires notching around the vertical column member to maintain alignment with the floor framing.
A.3 SAD NOTCH AROUND HSS NOTE: SEE DET. 10/- FOR ADDITIONAL INFO L2-1/2x2-1/2x3/8" (TYP.) HSS SEE STAIR PLAN BUILT UP C STRINGER UP BUILT UP C BYND HSS6X COL SEE PLAN
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