2) FRP DOORS a) Doors shall be made of fiberglass reinforced plastic (FRP) using chemically proven resins resistant to contaminants typically found in the environment for which these specifications are written. Doors shall be 1 3/4 inch thick and of flush construction, having no seams or cracks. All doors up to 4'0 x 8'0 shall have equal diagonal measurements with a maximum tolerance of +/- 1/32 inch. b) Door plates shall be 1/8 inch thick, molded in one continuous piece, starting with a 25-mil gelcoat of the color specified, integrally molded with at least three layers of 1.5 ounce per square foot fiberglass mat and one layer of 18 ounce per square yard woven roving. Door plate weight shall not be less than 0.97 lbs. per square foot at a ratio of 30/70 glass to resin. c) Stiles and rails shall be constructed starting from the outside toward the inside, of a 25-mil gel coat of the color specified followed by a matrix of at least three layers of 1.5 ounce per square foot of fiberglass mat. The stile and rail shall be molded in one continuous piece to a U-shaped configuration and to the exact dimensions of the door. In this manner there will be no miter joints or disparate materials used to form the one-piece stile and rail. d) Core material options to be a phenolic impregnated honeycomb core, or a 2 psf expanded polyurethane foam, which completely fills all voids between the door plates. Foam properties ASTM E-84 that comply with IBC Code...
