Automatic Melt-Out (Drop Out) Heat & Smoke Vents

Plasteco Model 417, 417D, 418 and 418D automatic melt-out (drop-out) heat and smoke vents have requirements that the plastic glazing will melt-out (drop-out) in less than 5 minutes at a temperature not exceeding 500 degrees F. Models 417 (single glazed) and 418 (double glazed) have a 12″ high aluminum curb. The curb has a 1-1/2″ thick insulation and a 2 x 4 wood nailer. Models 417D (single glazed) and 418D (double glazed) have a 12″ high double wall 1″ thick insulated aluminum curb, normally used on membrane roofs.

Models 417 and 418 with Wood Nailer

Specifications: Automatic Melt-Out Heat and Smoke Vents shall be single glazed Model 417 (Model 418 double glazed) as manufactured by Plasteco.

Units shall have a 12 inch high aluminum curb with 1-1/2″ thick insulation and a 2 x 4 wood nailer. Inner and outer frames shall be mill finish 6063-T5 extruded aluminum. Glazing shall be white translucent acrylic designed to withstand a 40 psf snow load. (Model 418 double glazed unit – inner pyramid shall be of a clear acrylic) Unit shall be furnished with plastic snap-on counter-flashing to be installed after curb flashing is completed.

Fall protection as required by OSHA Regulation 29 CFR 1910.23 (e)(8) shall be provided by FallGuard^® Skylight Screens. FallGuard^® Skylight Screens shall be shipped separately and installed prior to the installation of the melt-out heat and smoke vent.

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Hail Stone Screen- Unit shall have a 1/2″ x 1/2″ x .063″ galvanized welded wire mesh overlaid onto FallGuard^® Skylight Screens to reduce hail damage to skylights.

Models 417-D and 418-D Double Wall

Specifications: Automatic Melt-Out Heat and Smoke Vents shall be single glazed Model 417-D (Model 418-D double glazed) as manufactured by Plasteco.

Units shall have a 12 inch high double wall insulated aluminum curb. Inner and outer frames shall be mill finish 6063-T5 extruded aluminum. Glazing shall be white translucent acrylic designed to withstand a 10 psf snow load. (Model 418 double glazed unit – inner pyramid shall be of a clear acrylic) Unit shall be furnished with plastic snap-on counter-flashing to be installed after curb flashing is completed.
Fall protection as required by OSHA Regulation 29 CFR 1910.23 (e)(8) shall be provided by FallGuard^® Skylight Screens. FallGuard^® Skylight Screens shall be shipped separately and installed prior to the installation of the melt-out heat and smoke vent.