Rough Opening: 22 1/2" x 54" x 8'9"
Ceiling Hgt. Range (A): 84" - 105"
Landing Space (B): 67"
Projection (C): 71"
Step W x L x Facing: 3 3/8" x 12" x 3/4"
Side Rail W x D: 3" x 3/4"
Door Panel W x L x D: 20 3/4" x 52 1/4" x 1/4"