Provide factory-insulated premanufactured roof curbs of Style RC-7 as manufactured by Roof Products & Systems, Bensenville, IL, at all roof openings as shown on drawings. Curbs shall be of box section design with full base plate, 18 gauge galvalume® steel with continuous welded seams, integral water deflecting cricket, and shall be insulated with 1-1/2" thick 3 lb. density rigid fiberglass board encapsulated top and bottom. Curbs shall include any required internal stiffeners to support specified equipment above. Minimum curb height to be 8" or 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. Field assembled curbs not acceptable.