Provide factory-uninsulated premanufactured roof curbs of Style RC-5(use A or B profile as shown on drawings) as manufactured by Roof Products & Systems, at all roof openings as shown on drawings. Curbs shall be of 14 gauge galvanized steel with built-in cant extended to fully mitered and continuously welded corner seams and factory installed wood nailer with concealed fasteners. Minimum curb height to be as shown on drawings and shall accommodate designed deck slope to provide level mounting surface for specified equipment above. Premanufactured curbs shall include all burglar bars, liners, and other options as specifically shown on drawings.