This Louisville Premium Series wood attic ladder has a working load capability of 250 lb. This wood attic ladder fits ceiling heights of 8 ft 9 in to 10 ft and has a rough opening of 22-1/2 in x 54 in. The Premium L224P features slip-resistant steps, adjustable spring, an ergonomic T-handle, easy-hang straps and 3-1/2 in deep reinforced steps. The Louisville l224P Premium wood attic ladder meets or exceeds the safety standards set by ANSI.