This Louisville Elite Series, Type IAA aluminum attic ladder has a working load capability of 375 lb. This aluminum attic ladder fits ceiling heights of 7 ft 8 in to 10 ft 3 in and has a rough opening of 25-1/2 in x 54 in. The Elite AA2510 attic ladder features slip resistant cross-tread steps, adjustable shoes, an advanced cylinder design, and an ergonomic T-handle. The Louisville AA2510 aluminum attic ladder meets or exceeds the safety standards set by ANSI.