SpeciÞcations: Automatic Melt-Out Heat and Smoke Vents shall be FM approved single glazed Model 417 (Model 418 double glazed) as manufactured by Plasteco, Inc., Houston, Texas (800-231-6117, Fax 713-453-8372).

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

Fall protection as required by OSHA Regulation ¤ 1926.501 ÒDuty to have Fall ProtectionÓ shall be provided by FALLGUARDª Skylight Screens. FALLGUARDª Skylight Screens shall be shipped separately and installed prior to the installation of the melt-out heat and smoke vent.

Add Alternate Ð Hail Stone Screens shall be 1Ó x 1Ó x .063Ó galvanized welded wire mesh overlaid onto the FALLGUARDª Skylight Screens. Screens shall have been tested to resist without permanent deformation, the impact energy of a 2" diameter hail stone (22ft lbs) as required by FM.