Century?s supreme aluminum series of folding attic stairways are the safest, most durable solution on the market today with a clean, aesthetic design. Engineered for residential use, it offers a 350-lb. Load rating, a rough opening of 22-1/2 in. x 54 in., fits ceiling heights between 8 ft. 9 in. ? 10 ft. 4 in., a landing space of 73 in., ...