Installation Guide

4
Installation Guidelines
Preparation (Figure A)
- Choose the required oor plan – see page 5.
- Alternate the wide dimensions on succesive treads of straight runs and less than 20° angles.
- If the angle of two successive steps is greater than 20
o
, the wider dimension of the treads are to
face outward – see Figure A2 and A3, page 5.
US
Before installation
IMPORTANT
Before starting installation, calculate the exact rise height of each step of the staircase. This is
done by measuring the distance from the lower oor to the upstairs oor measuring vertically
along the wall and then dividing by the number of rises. The number of rises is the same as the
number stair treads plus 1. The plus 1 is to consider distance of the last step of the staircase to
the upstairs oor.
S = (page 5)
Example: Top edge of oor to top edge of next oor: 102”, 12 rises (11 steps + 1).
102” divided by 12 = 8 ½”. This is the rise height per step.
The opening in the ceiling should not be less than 51 ¼” for straight ights of steps.
This is to ensure that walking up the steps is a comfortable experience.
Recommended rise height: 7
5
/
16
” to 8
1
/
16
”
Maximum rise height: 7
5
/
16
” to 8
1
/
16
”
X
Y
R1-99672-USA-01 / 10-03-2011