Risers & Treads — with 7-1/2”
Desired Riser Height
Your “desired riser height” is the default 7-1/2
inches, and you want to calculate the number of
stair risers, riser height, the overage/underage
of risers, number of treads, width of treads, and
underage/overage of treads. (For this problem
you’ll need the rise and run of the stair.) The
rise of the stair is 28 feet 5-1/2 inches, the run of
the stair is 35 feet 6 inches.
COMMENTS KEYSTROKES
Clear calculator [On/C] [On/C]
Do All Clear [Conv] [x]*
Enter Rise 28 [Feet] 5 [Inch] 1 [/] 2
[Rise]
Enter Run 35 [Feet] 6 [Inch] [Run]
Recall desired riser ht. [Rcl] [Stair]
Answer: 7-1/2 IN RISER
Convert to 1/16’s [Conv] 1
Find # of Risers [Stair]
Answer: 46 # RISER
Find actual Riser ht. [Stair]
Answer: 7-7/16 IN RISER
Find under/overage [Stair]
Answer: 0-5/8 IN RISER
Find # of Treads [Stair]
Answer: 45 # TREAD
Find Tread width [Stair]
Answer: 9-7/16 IN TREAD
Find under/overage [Stair]
Answer: – 1-5/16 IN TREAD
* OPTIONAL: It’s a good idea to do an All Clear [Conv] [x]
to reset to the default settings before starting a new
problem.
48 — Construction Master III
®
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