This Louisville Energy Efficient Series aluminum attic ladder has a working load capability of 375lbs. This energy-efficient ladder features an insulated door with R-10 extruded foam and weather stripping seal that reduces air leakage. This attic ladder fits ceiling heights of 7 7 to 10 3 and has a rough opening of 25.5 X 54 . The Energy-efficient AEE2510 features slip resistant cross-tread steps adjustable shoes an advanced cylinder design and an ergonomic T-handle.