CAN/CGSB-93.3-M91

1.1 Applies to zinc-coated (galvanized) and aluminum-zinc alloy coated steel sheet with a factory applied finish coat, intended primarily for exterior use in residential building applications. 1.2 Intended Uses - Prefinished steel sheets covered by this standard are intended for fabrication into such building products as roll-formed windows, siding, fascia, soffits, gutters, downspouts and roofing.