Max load: 300 lbs Special 3 1/8” thick lid, the whole space is filled with insulating material (polystyrene), offers an excellent barrier to nearly diminish heat loss New design guarantees greater firmness and stability of the ladder When attic stairs door opens the side springs fall along with it allowing wider and more comfortable access to the attic (the widest entrance on the market) As the ladder is being opened up the hinges automatically move the ladder away from the door to create a space between the ladder and the door, allowing instant use of the stairs without any changes The door is well balanced it opens and closes easily (NO SUDDEN MOVEMENTS) Paintable door surface to match finished ceiling Red metal safety handrail included Metal opening/closing rod included Two (2) year 100% warranty