Ceiling Installation: Designed for ceiling thickness 5.12 in and vertical height of 10.5-11 ft, this steel attic ladder allows 2 in wall clearance to fit various layouts. Cut a 39.4 x 27.5 in opening, drill in place, lift the ladder, and fasten with screws. (Must be mounted on a load-bearing area!) 660LBS Strong Load Capacity: Made of impact-resistant alloy steel with durable hinges and support rods, this ladder maintains strength even after repeated use. The X-frame adds stability, while anti-slip rubber feet help avoids shifting. 5.5-inch wide steps ensure better balance and easier climbing Hydraulic Support for Safe Use: Upgraded dual hydraulic rods allow the ladder to lower slowly and steadily, helping prevent sudden drops. Saves effort during use, ideal for the elderly or those with limited strength Effortless Open & Close: Includes pull rod and ringno extra tools or height needed. Just pull to open, then use the rod to fold it back