SpeciÞcations: Curb mounting, melt-out (drop-out) automatic heat and smoke vents shall be single glazed model 407 (model 408 double glazed) as manufactured by Plasteco, Inc., Houston, TX. (1-800-231-6117, Fax 713-453-8372).

Inner and outer frame shall be 6063-T5 extruded aluminum. Glazing shall be white translucent acrylic designed to withstand a 40 psf snow load.

(Model 408 double glazed unit add the words Òinner pyramid shall be of a clear acrylicÓ).

Maximum curb thickness shall be 1-1/2Ó. Curbs for 5098 size units shall have a 2 x 4 or a 1-1/2Ó square tubing to serve as a structural support for the center mullion. 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.