Calculated Industries 4090 - Manual (Page 99)

98 — ITI S
HEET
M
ETAL
/HVAC P
RO
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:
o o 0.
2 0 f R X 20
FEET
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
) 20
FEET
0
INCH
s RISE 15
FEET
7-1/2
INCH
STORED