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Stair stringer length – Calculated Industries 3088 User Manual

Page 38

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COMMENTS

KEYSTROKES

Mult. by height (depth) [x] 2 [Feet] [=]

Answer: 338.4505 CU FT

Div. by 2 per formula* [÷] 2 [=]

Answer: 169.2253 CU FT

Step 4— Add Volumes of Sections “A” and B”
Add to Value in Mem.

[M+]

Recall Total

[Rcl] [M+]

Answer: 499.2253 CU FT

Convert to yards

[Conv] [Yds]

Answer: 18.48983 CU YDS

Clear Memory

[Rcl] [Rcl]

Stair Stringer Length

You have a floor-to-floor Rise of 8 feet 10-3/8

inches and 7-1/2-inch risers. What’s the stringer
length if the Run of the stairway is 10 feet 10
inches?
COMMENTS

KEYSTROKES

Clear calculator

[On/C] [On/C]

Compute Rise of

stringer**

8 [Feet] 10 [Inch]

3 [/] 8 [–]

7 [Inch] 1 [/] 2 [=]
8 FT 2-7/8 IN

Enter as Rise

[Rise]

Enter Run

10 [Feet] 10 [Inch]
[Run]

Find stringer length

[Diag]

Answer: 13 FT 7-21/64 IN

* Using the formula for Area of a Triangle: 1/2 B x H -- you
multiply the Base (Run) x Height (Rise) and divide by 2 to
find the area of triangle "B."

** Stringer Rule: For stringer calculations, the Rise of the
stairway is the floor-to-floor Rise minus the length of the last
riser.

38 — Construction Master III

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