Louisville AH2540MG-R5 aluminum framed attic ladder offers an R5 insulated door with factory installed weather stripping providing more energy efficiency than a traditional attic ladder. Predrilled holes plus a lighter weight, more square aluminum frame provides easier installation than traditional wood framed attic ladders. Designed for attic openings of 25.5 in. x 54 in., the adjustable shoes allow the unit to fit ceiling heights from 7 ft. 8 in., 10 ft. 3 in. Gas piston system allows easier and smoother opening and closing of the door. This attic ladder has a working load capacity of 375 lbs.. Aluminum frame with pre-drilled holes for easy installation. R5 insulated door panel helps regulate temperature all year long. Attic Ladder fits 7 ft. 8 in. to 10 ft. 3 in. ceiling heights. Features: Insulated. Fits Ceiling Height: 10 ft.,8 ft.. Ladder Rating: Heavy Load Capacity - 350 lbs. & Up. Material: Aluminum. Number of Steps: 11. Product Weight (lb.): 47.40 lb. Certifications and Listings: ANSI Certified. Maximum Ceiling Height (ft.): 10. Maximum Ladder Length (ft.): 10. Minimum Ceiling Height (ft.): 8. Recessed Opening Height (in.): 11.75. Recessed Opening Length (In.): 54. Recessed Opening Width (in.): 25.5. Rung/Step Depth (in.): 3 in. Swing Clearance (ft.): 5.5