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Total Rise
2'
3'
4'
5'
6'
7'
8'
9'
10'
11'
12'
13'
14'
15'
16'
17'
18'
19'
20'
21'
22'
23'
24'
25'
26'
27'
28'
29'
30'
_
1"
2"
3"
4"
5"
6"
7"
8"
9"
10"
11"
_
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
Ideal Rise
5"
5~1/2"
6"
6~1/2"
7"
7~1/2"
8"
8~1/2"
9"
9~1/2"
10"
Show Nosing
Show Stringer
Restrict
Calculate Run
Use Ideal Run
Use Total Run
Calc by Angle
Calculated at
Run = 2'1/2" - (rise * 2)
Angle
30
31
32
33
34
35
36
37
38
39
40
Ideal Run
8"
8~1/4"
8~1/2"
8~3/4"
9"
9~1/4"
9~1/2"
9~3/4"
10"
10~1/4"
10~1/2"
10~3/4"
11"
11~1/4"
11~1/2"
11~3/4"
12"
12~1/4"
12~1/2"
12~1/4"
13"
13~1/4"
13~1/2"
13~3/4"
14"
14~1/4"
14~1/2
14~3/4"
15"
Total Run
Feet
1'
2'
3'
4'
5'
6'
7'
8'
9'
10'
11'
12'
13'
14'
15'
16'
17'
18'
19'
20'
21'
22'
23'
24'
25'
26'
27'
28'
29'
30'
Inches
_
1"
2"
3"
4"
5"
6"
7"
8"
9"
10"
11"
Frac
_
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
(Keep Total Run)
Possible Rises
12 of 8~11/32"
13 of 7~11/16"
14 of 7~5/32"
15 of 6~21/32"
16 of 6~1/4"
17 of 5~7/8"
18 of 5~9/16"
19 of 5~1/4"
20 of 5"
Stringer Width
4"
5"
6"
7"
8"
9"
10"
11"
12"
13"
14"
15"
16"
17"
18"
19"
20"
21"
22"
23"
24"
25"
26"
27"
28"
29"
30"
_
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
Concrete Thick
3"
3~1/4"
3~1/2"
3~3/4"
4"
4~1/4"
4~1/2"
4~3/4"
5"
5~1/4"
5~1/2"
5~3/4"
6"
6~1/4"
6~1/2"
6~3/4"
7"
7~1/4"
7~1/2"
7~3/4"
8"
8~1/4"
8~1/2"
8~3/4"
9"
9~1/4"
9~1/2"
9~3/4"
10"
Stair Width
2'
3'
4'
5'
6'
7'
8'
9'
10'
11'
12'
13'
14'
15'
16'
17'
18'
19'
20'
21'
22'
23'
24'
25'
26'
27'
28'
29'
30'
_
1"
2"
3"
4"
5"
6"
7"
8"
9"
10"
11"
_
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
Show Headroom
Headroom
3'
4'
5'
6'
7'
8'
9'
10'
11'
12'
_
1"
2"
3"
4"
5"
6"
7"
8"
9"
10"
11"
_
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
Floor Thickness
1"
2"
3"
4"
5"
6"
7"
8"
9"
10"
11"
12"
13"
14"
15"
16"
17"
18"
19"
20"
21"
22"
23"
24"
25"
26"
_
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
13/16
7/8
15/16
Total Rise
8'4"
13
Runs of
10"
14
Rises of
7~5/32"
Stringer Run -> 1'9/32", 2'9/16", 3'7/8", 4'1~5/32", 5'1~7/16", 6'1~23/32", 7'2~1/32", 8'2~5/16", 9'2~19/32", 10'2~7/8", 11'3~3/16", 12'3~15/32", 13'3~3/4", 14'4~1/32"
With a total rise of
8'4"
and total run of
10'10"
, the stairs are
35.5
°
and have
14
rises of
7~5/32"
and
13
runs of
10"
The Stringer is
14'4~1/32"
long and
1'
wide with throat of
6~3/16"
The void volume (under the stairs) is
5.23
y³
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