Architectural · A-8VHSN

Concrete Filled Steel Stair Pan Tread and Riser Detail

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A concrete-filled metal pan stair assembly features a fourteen-gauge bent steel pan supported by a stringer. The riser has a maximum height of seven inches and the tread has a minimum depth of eleven inches with a three-eighths-inch radius bend. A pour-in-place contrasting stripe is provided at every step. The stair pans are welded to the stringers with one-eighth-inch fillet welds spaced at one inch typically, with a bent lip to riser connection welded at two and one-half inches. Exterior stairs include a tread slope of one-eighth inch per twelve inches.

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