An MC 12x10.6 steel channel acts as a stair landing ledger and connects to a 7-1/4-inch concrete tilt-up wall. The ledger secures to the wall using a 3/8-inch by 3-1/2-inch by 9-inch plate fastened with two 3/4-inch diameter ASTM A325-N bolts. The plate is anchored into the concrete wall with 1/2-inch diameter Simpson Titen HD anchors spaced at 18 inches on center. A quarter-inch fillet weld secures the connection assembly.
MC 12"x10.6 LEDGER FOR STAIR LANDING 1/2" DIA. SIMPSON TITEN HD ANCHORS @ 18" O.C. 7 1/4" CONCRETE TILT-UP WALL 3/8"x3-1/2"x9" PLATE w/ (2) 3/4" DIA. A-325 N BOLTS 1/4"
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