This assembly utilizes a C8 x 11.5 channel as a header for a roof opening, with the flat heel side of the channel oriented toward the opening. The channel is supported by open web steel joists, with the connection to the joist provided by a 3/8 inch by 4 inch plate secured with two 3/4 inch diameter A325 bolts. A 3/16 inch fillet weld is used to connect the angle to the joist, and a 3/16 inch shop weld is provided at the contractor's option for the deck attachment. The assembly accommodates a mechanical duct or roof hatch, with fiber cant strips installed per architectural specifications above the metal deck.
MECHANICAL DUCT OR ROOF HATCH FIBER CANT. PER ARCH. METAL DECK C8 x 11.5, TYP. FLAT HEEL SIDE OF CHANNEL IS TOWARD OPENING 3/8x4" PL. WITH (2) 3/4" DIA. A325 BOLTS OWJ, SEE PLAN 3/16 2 ANGLE TO JOIST 3/16 SHOP WELD AT CONTRACTOR'S OPTION 3/16 5
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