Page 4
May 2020
Determine whether the chosen location allows su
ffi
cient “projection” and “landing space” for your unit. See Figure 1
and 2 below and TABLE A on page 3.
* Mark out the rough opening size for your unit according
to TABLE A.
Note that the finished metal trim extends
beyond the rough opening about 1 1/2” when the unit
is installed. Allow clearance for this on all four sides.
* Cut the rough opening through the ceiling material.
Locating The Stair
Preparing The Rough Opening
Projection
Figure 1
Landing Space
Figure 2
Metal Trim
