The assembly is constructed with a C12 x 20.7 galvanized steel channel stringer supporting typical galvanized steel bar grate stair treads. A C10 galvanized frame supports a removable galvanized steel bar grate stair thread at the landing. A galvanized angle measuring 1-1/2 inches by 1-1/2 inches by 1/8 inch spans the width of the landing on each side and is welded to the channel stringer. A 1-1/2 inch diameter galvanized steel pipe guardrail is welded directly to the stringer.
C12 X 20.7 GALVANIZED STRINGER GALVANIZED STEEL BAR GRATE STAIR THREADS, TYP. REMOVABLE GALVANIZED STEEL BAR GRATE STAIR THREAD 1 1/2" DIA. GALVANIZED STEEL PIPE GUARDRAIL CONSTRUCTION WELDED TO STRINGER C10 GALVANIZED FRAME GALVANIZED L 1-1/2" X 1-1/2" X 1/8" X WIDTH OF LANDING EACH SIDE. WELD TO CHANNEL STINGER
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