Material-Steel: Cover and frame are 14
gauge G-90 paint bond galvanized steel
aluminum: Cover and frame are 11 gauge
Covers: Breakformed, hollow-metal design
with 1" concealed fiberglass insulation, 3"
beaded, overlapping flange, fully welded at
corners, and internally reinforced for 40 psf
(195 kg/m2) live load
Curb: 12" in height with integral capflashing,
1" fiberboard insulation, fully welded at corners,
and 3-1/2" mounting flange with 7/16"
holes provided for securing frame to the
Gasket: Extruded EPDM rubber gasket
permanently adhered to the covers
Hinges: Heavy-duty pintle hinges
with 3/8" Type 316 stainless steel hinge