A ship's ladder stair stringer bears on a C12X20.7 channel spanning between joists over a metal roof deck and steel joist. An L6x4x3/8 angle measuring zero feet eleven inches long connects the assembly with a four-inch slot for a three-quarter-inch diameter bolt. A quarter-inch fillet weld secures the channel to the metal deck and framing.
1/4" C12X20.7 SPANS BTWN JSTS 1/4" 4" SLOT FOR 3/4" DIA BOLT SHIPS LADDER STAIR STRINGER BY SUPPLIER L6x4x3/8X0'-11" MTL ROOF DECK STL JOIST C12X20.7 SPANS BTWN JSTS 1/4" 4" SLOT FOR 3/4" DIA BOLT SHIPS LADDER STAIR STRINGER BY SUPPLIER L6x4x3/8X0'-11" MTL ROOF DECK STL JOIST MTL ROOF DECK
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