McNichols GW-150 19-W-4 one-half inch by three-sixteenth inch metal bar grating bears over a hollow structural section framing member sized per plan. The grating cantilevers up to one foot maximum beyond its support with a one-eighth inch maximum clearance gap to the existing spiral stair landing.
CANTILEVER 1'-0" MAX 1/8" MAX (E) SPIRAL STAIR LANDING HSS PER PLAN MCNICHOLS GW-150 19-W-4 1/2"x3/16" GRATING
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