Architectural · A-VWJW3

Smoke Hatch Skylight and Equipment Platform Roof Details

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A smoke hatch skylight and an equipment platform mount on a roof curb. The smoke hatch incorporates single dome glazing, torsion springs, a latch assembly with an exterior manual release, a UL/FM fusible link, and bulb gaskets, supported by wood curbs anchored to the roof structure with mid gutters spanning the opening. A separate detail provides a cricket plan view featuring tapered perlite insulation and a twenty-four gauge galvanized iron sleeved cap flashing over the equipment platform. The equipment platform curb utilizes two-by-four wood framing spaced at sixteen inches on center over a two-by-six ledger, finished with a minimum half-inch plywood deck and four-inch flashing. Waterproofing layers comprise a full specified membrane or base sheet with an APP torch-on layer, twenty-four gauge galvanized iron cap flashing fastened with steel and neoprene washers at twenty-four inches on center, two reinforcement layers embedded in mastic, a mineral-surfaced flashing sheet, and a perlite cant strip with three-inch legs nailed at twelve inches on center.

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