Owner's manual

98 — ITI SHEET METAL/HVAC PRO
Stairs — Given Only the Run
You’re building a stairway with a total Run of 20 Feet. Your desired
Riser height is 7-1/2 Inches and desired Tread width is ten Inches
(default, or preset values). The desired headroom is 6 Feet 8 Inches
and floor thickness 10 Inches (defaults). Find all stair values, then
calculate the Rise.
KEYSTROKE DISPLAY
1. Enter Run:
oo 0.
20fR X20FEET 0 INCH
2. Find Riser height, number of Risers, Riser Overage/Underage,
Tread width, number of Treads, Tread Overage/Underage, stairwell
opening, Stringer length and Angle of Incline. As a final step, calcu-
late the Rise:
s R-HT 7-1/2 INCH
s RSRS 25.
s R+/– 0 INCH
s T-WD 10 INCH
s TRDS 24.
s T+/– 0 INCH
s OPEN 10 FEET 0 INCH
s STRG 25 FEET 0 INCH
s INCL 36.8699°
s RUN (X)20FEET 0 INCH
s RISE 15 FEET 7-1/2 INCH
STORED