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  Willamette StrucJoist SJ-15-25-35 StrucJoist - Page 11
|
TABLE V
|
|
Roof
Span Table for StrucJoist Sloped 8/12 and Less
|
| |
Live
Load (psf) |
Dead
Load (psf) |
SJ-150 |
SJ-250 |
| 9-1/2" |
11-7/8" |
9-1/2" |
11-7/8" |
14" |
16" |
| 12"
O.C. |
Non-Snow
125% |
20 |
15 |
22'-6" |
27'-0" |
23'- 8" |
28'- 4" |
32'- 4" |
36'- 0" |
| 20 |
20 |
21'- 3" |
25'- 7" |
22'- 4" |
26'-10" |
30'- 8" |
34'-1" |
| Snow
115% |
25 |
17 |
20'-5" |
24'- 6" |
21'-5" |
25'-8" |
29'- 4" |
32'- 8" |
| 30
|
17 |
19'-8" |
23'-8" |
20'-8" |
24'-9" |
28'-
4" |
31'-
6" |
| 40 |
17 |
18'-6" |
22'-3" |
19'-5" |
23'-3" |
26'-7" |
29'-
7" |
| 50 |
17 |
17'- 6" |
21'-1" |
18'- 5" |
22'-1" |
25'- 3" |
27'-11" |
| 16"
O.C. |
Non-Snow
125% |
20 |
15 |
20'-5" |
24'- 6" |
21'- 5" |
25'- 8" |
29'- 4" |
32'- 8" |
| 20 |
20 |
19'- 4" |
23'- 2" |
20'- 3" |
24'- 4" |
27'- 9" |
30'-11" |
| Snow
115% |
25 |
17 |
18'-6" |
22'-2" |
19'-5" |
23'-3" |
26'- 7" |
29'- 7" |
| 30
|
17 |
17'-10" |
21'-5" |
18'-9" |
22'-5" |
25'-8" |
28'-7" |
| 40 |
17 |
16'-9" |
20'-0" |
17'-7" |
21'-1" |
24'-0" |
26'-0" |
| 50 |
17 |
15'-11" |
18'- 5" |
16'-8" |
20'-0" |
22'- 2" |
22'- 8" |
| 19.2"
O.C |
Non-Snow
125% |
20 |
15 |
19'- 2" |
23'- 0" |
20'-1" |
24'- 2" |
27'- 7" |
30'- 8" |
| 20 |
20 |
18'-1" |
21'- 9" |
19'- 0" |
22'-10" |
26'-1" |
29'- 0" |
| Snow115% |
25 |
17 |
17'- 4" |
20'-10" |
18'- 3" |
21'-10" |
25'- 0" |
27'-5" |
| 30 |
17 |
16'-
9" |
20'-0" |
17'-7" |
21'-1" |
24'-0" |
25'-11" |
| 40 |
17 |
15'-
9" |
18'-0" |
16'-6" |
19'-
9" |
21'-10" |
22'-1" |
| 50 |
17 |
14'- 7" |
15'- 5" |
15'- 8" |
18'- 3" |
18'-11" |
18'-11" |
| 24"
O.C. |
Non-Snow
125% |
20 |
15 |
17'- 9" |
21'-4" |
18'- 8" |
22'- 4" |
25'- 7" |
28'- 5" |
| 20 |
20 |
16'- 9" |
20'- 2" |
17'- 7" |
21 '-2" |
24'- 2" |
26'-11" |
| Snow115% |
25 |
17 |
16'-1" |
18'-9" |
16'-10" |
20'- 3" |
22'- 7" |
23'- 6" |
| 30
|
17 |
15'-
5" |
17'-3" |
16'-3" |
19'-
4" |
21'-2" |
21'-
2" |
| 40 |
17 |
14'-
0" |
14'-5" |
15'-3" |
17'-7" |
17'-7" |
17'-7" |
| 50 |
17 |
12'-1" |
12'- 4" |
13'- 5" |
15'-1" |
15'-1" |
15'-1" |
Roof Span Table for StrucJoist Sloped
8/12 and Less
| |
Live
Load (psf) |
Dead
Load (psf) |
SJ-350 |
SJ-550 |
| 11-7/8" |
14" |
16" |
11-7/8" |
14" |
16" |
| 12"
O.C. |
Non-Snow
125% |
20 |
15 |
30'-6" |
34'- 9" |
36'- 0" |
34'-10" |
36'- 0" |
36'- 0" |
| 20 |
20 |
28'-10" |
32'-10" |
36'- 0" |
33'- 0" |
36'- 0" |
36'- 0" |
| Snow
115% |
25 |
17 |
27'- 8" |
31'- 6" |
35'- 0" |
31'- 7" |
35'-11" |
36'-0" |
| 30 |
17 |
26'-
8" |
30'-
5" |
33'-
9" |
30'-6" |
34'-8" |
36'-
0" |
| 40 |
17 |
25'-1" |
28'-
7" |
31'-
9" |
28'-8" |
32'-7" |
36'-
0" |
| 50 |
17 |
23'- 9" |
27'-1" |
30'-1" |
27'- 2" |
30'-11" |
34'-3" |
| 16"
O.C. |
Non-Snow
125% |
20 |
15 |
27'- 8" |
31'- 6" |
35'- 0" |
31'- 7" |
35'-11" |
36'- 0" |
| 20 |
20 |
26'- 2" |
29'-10" |
33'-1" |
29'-11" |
34'- 0" |
36'- 0" |
| Snow
115% |
25 |
17 |
25'- 0" |
28'- 6" |
31'- 9" |
28'- 7" |
32'- 7" |
36'-0" |
| 30
|
17 |
24'-2" |
27'-6" |
30'-7" |
27'-7" |
31'-5" |
34'-10" |
| 40 |
17 |
22'-8" |
25'-10" |
28'-1" |
25'-11" |
29'-6" |
32'-9" |
| 50 |
17 |
21'- 6" |
23'-11" |
25'-11" |
23'- 9" |
28'-0" |
29'- 6" |
| 19.2"
O.C |
Non-Snow
125% |
20 |
15 |
26'-0" |
29'- 7" |
32'-11" |
29'- 8" |
33'- 9" |
36'- 0" |
| 20 |
20 |
24'- 7" |
28'- 0" |
31'-1" |
28'-1" |
31'-11" |
35'- 5" |
| Snow115% |
25 |
17 |
23'-6" |
26'-10" |
29'- 7" |
26'-11" |
30'- 7" |
33'-11" |
| 30 |
17 |
22'-8" |
25'-10" |
28'-
0" |
25'-11" |
29'-
6" |
32'-9" |
| 40 |
17 |
21'-
4" |
23'-
7" |
25'-
6" |
23'-1" |
27'-
8" |
28'-
8" |
| 50 |
17 |
19'- 8" |
21'- 9" |
22'- 6" |
19'- 9" |
24'- 7" |
24'- 7" |
| 24"
O.C. |
Non-Snow
125% |
20 |
15 |
24'-1" |
27'- 5" |
30'- 6" |
27'-6" |
31'- 3" |
34'- 8" |
| 20 |
20 |
22'- 9" |
25'-11" |
28'-10" |
26'- 0" |
29'- 7" |
32'-10" |
| Snow115% |
25 |
17 |
21'-9" |
24'-4" |
26'-4" |
24'-7" |
28'- 4" |
30'- 6" |
| 30
|
17 |
20'-11" |
23'-1" |
24'-11" |
22'-1" |
27'-4" |
27'-6" |
| 40 |
17 |
18'-5" |
20'-11" |
21'-0" |
18'-5" |
22'-11" |
22'-11" |
| 50 |
17 |
15'-10" |
18'- 0" |
18'- 0" |
15'-10" |
19'- 8" |
19'- 8" |
Notes:
- Spans shown are simple spans.
- Spans shown are "horizontal"
clear spans.
- The 20 psf non-snow live loads have been
reduced to 16 psf for slopes of 4:12 and greater. Reduce spans 3'-0"
for slopes greater than 8:12. Maximum roof slope is 12:12.
- Maximum deflection is limited to L/180
under total load and L/240 under live load.
- Spans are based on 1-3/4" exterior
reactions without web stiffeners.
- All roof joists to be slopped 1/4"
per foot minimum.
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