Century's Windsor Series of folding attic stairways offer industry-leading quality and safety at an affordable cost. For residential use only, this model touts a 250-lb. load rating, has a rough opening of 25 in. x 54 in., and fits ceiling heights between 7 ft. 8 ft. 9 in., landing space of 64 in., and a minimum clearance-projection space of 66 in. It is made in the USA of kiln-dried southern yellow pine for remarkable strength. It features 1 in. x 4 in. steps and stiles and 3/16 in. ladder rods for stable, confident movement up and down the stairway. Reinforced in all the right places, the stairs feature long-lasting, zinc-plated side hinges and power arms and are equipped with Century's user-adjustable red nut J-bolt technology. This feature allows you to adjust the door panel while the stairway is open instead of taking the adjustment rom the attic, with the door panel closed. All Century attic stairways are independently certified to meet ANSI safety standards.