* Note:
This is minimum opening for stairs to operate, larger opening will work as well. When extended stairs will take up 8" x 18"
space in the opening. Make your opening large to allow easy access to the attic
F- Attic space required
F = 18" from ceiling up
L-Width of stair ladder
L = 15"
G - Step size
G = 3-1/8" x 13-1/2
Rise, distance, between steps
H = 8.75" to 9.5"
Cover door construction
Cover door not included.
*Clear opening
Your opening length minus 8"
Opening width is not reduced
*Clear opening measurement indicates how big of a box can you get through the opening into the attic after the ladder unfolded.
For example if your opening is 20" wide and 30" long, the clear opening will be 22" long ( 30" - 8")
x 20" wide ( width is not reduced).
Calvert USA, Inc., All rights reserved, Calvert Attic Stairs, Calvert Stairs are trademarks
of Calvert USA, Inc.
