A C12x20.7 channel ledger acts as the stair landing support and connects to a concrete tilt-up wall. The connection utilizes a 3/8-inch by 3-1/2-inch by 9-inch steel plate fastened with three 3/4-inch diameter A-325 N bolts and five-sixteenths inch fillet welds. The ledger is anchored to the concrete wall using 3/4-inch diameter Simpson Titen HD anchors spaced at 18 inches on center.
C12x20.7 LEDGER FOR STAIR LANDING 3/4" DIA. SIMPSON TITEN HD ANCHORS @ FRAMING MEMBERS AND (1) 3/4" DIA. TITEN AT 18" O.C. CONCRETE TILT UP WALL, SEE PLANS 3/8"x3-1/2"x9" PLATE w/ (3) 3/4" DIA. A-325 N BOLTS 5/16 TYP.
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