Calvert USA, Attic stairs

Compact folding stairs specifications

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Description

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Specifications

Common questions

Installation instructions

Customer comments

Model No.	No. of Steps	(A) Floor to Ceiling	(C D) Rough Opening Size	(B) Swing Clearance	(E) Landing Space	Weight of the Unit	Door Cover
1840	12	7' 0" - 9' 1"	22.5" x 34"	49"	44"	50 lb	White 1" Foam core
1043	12	7' 0" - 9' 1"	24" x 34"	49"	44"	55 lb	White 1" Foam core
1045	12	7' 0" - 9' 1"	28" x 34"	49"	44"	55 lb	White 1" Foam core

Can I unfold the ladder through the door?.....More information on swing clearance......

F- Attic space required

F = 32" at 9'5" ceiling height, 27" at 8" ceiling height

L-Width of stair ladder

L = 16" ( 14" for 22.5" wide models)

Step size (Inside of the ladder)

14.5" (12.5") x 3-1/2"

Rise, distance, between steps

9.5"

Cover door construction

1" thick panel, 3/4" polystyrene insulation, solid wood edging, 1/8" white MDF panels on both sides,

H - maximum ceiling depth

H = 7-1/2", or top of the ceiling (floor) must be notched

G - stringer overhang past frame

G = 2"

Cover door insulation value

R=5 - 1" thick cover door

*Clear opening

(C) - 5", rough opening width minus 5"

(D) - 11", rough opening length minus 11"

*Clear opening measurement indicates how big of a box can you get through the opening into the attic after the ladder unfolded. For example item 1045 requires rough opening 28" x 34", the clear opening will be 23"( 28" -5") x 23" ( 34" - 11").