Installation Guide

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Platform and Base Installation
1. While all treads and platform are on the ground, partially thread set screws
(A) into each tread and platform sleeve.
2. Partially thread set screws (A) into the baseplate (1). Insert the center
column assembly into the baseplate until is fully seated. Attach the
baseplate (1) to the center column assembly with set screws (A).
3. Determine the number of 1/8” spacers per rise using the following simple
calculations:
a. Add number of treads and platforms = _______
b. Measure the floor to floor height in inches = ______
c. Divide 3b by 3a = ______ (This is your riser height)
NOTE: Riser height is usually between 8 ½” and 9 ½”.
4. The bottom tread has a hub that measures 5.75” in height. The remaining
treads have a hub that measures 8.5” in height.
5. The total number of spacers needed can be determined below.
a. Floor to floor measurement from 3b in inches = _______
b. Count the # of treads (not including the bottom tread) = ______
c. Multiply 5b by 8.5 = ______
d. Add 16.25 to 5c = ______
e. Subtract 5d from 5a = ______
f. Divide 5e by .125 = ______
g. Stairs with Wood Tread Covers = Subtract 6 from 5e = _____. This is
the total number of spacers needed for your stair.
h. Stairs without Wood Tread Covers = Place 6 of the spacers counted
out in 5f onto the center column assembly. _______
6. The remaining spacers from 5g or 5f must be evenly distributed in between
the treads of the stair.
a. Divide remaining number of spacers (5g or 5h) by 3a = _______
b. The whole number is the number of spacers for each rise. ______
EXAMPLE: If 5h is 48.5 and 3a = 12, the result is 48.5/12 = 4.0417. The
whole number would be 4.
c. Multiply 3a by 6b = ______
d. Subtract 6c from 5g/5h = _______
NOTE: This is the remaining number of spacers that must be added
throughout the entire stair to meet the floor to floor height. Do not add
all of the spacers calculated in 6d to only one rise. Add only one
spacer per rise.
7. Place the number of spacers determined in 6b onto the center column
assembly.
8. Place the bottom tread (18) onto the center column assembly. Measure
the rise from the floor to the top surface of the tread. If your stair has wood
tread covers, the measurement should be 0.75” shorter than the rise height
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