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  Willamette StrucJoist SJ-15-25-35 StrucJoist - Page 10
| TABLE IV |
| StrucJoist
Floor Spans |
Live
Load = 40 psf |
| |
Dead
Load = 10 psf (12 psf @ SJ-550) |
| |
LL
Defl=L/480 |
| Joist
Series |
Joist
Depth |
ON -
CENTER SPACING |
| Simple
Span |
Multiple
Span |
| 12"o/c |
16"o/c |
19.2"o/c |
24"o/c |
12"o/c |
16"o/c |
19.2"o/c |
24"o/c |
| SJ-150 |
9-1/2" |
17'- 0" |
15'- 7" |
14'- 9" |
13'-10" |
18'- 8" |
17'- 0" |
16'-1" |
15'- 0" |
| 11-7/8" |
20'- 4" |
18'- 8" |
17'- 7" |
16'- 6" |
22'- 3" |
20'- 4" |
19'- 3" |
15'- 5"
|
| SJ-250 |
9-1/2" |
17'- 9" |
16'- 3" |
15'- 4" |
14'- 4" |
19'- 5" |
17'- 9" |
16'- 9" |
15'- 8" |
| 11-7/8" |
21'-3" |
19'- 5" |
18'- 4" |
17'-1" |
23'- 2" |
21'-2" |
20'- 0" |
16'- 9"
|
| 14" |
24'- 2" |
22'-1" |
20'-10" |
19'- 6" |
26'- 5" |
24'- 2" |
21'-0" |
16'- 9"
|
| 16" |
26'-11" |
24'- 6" |
23'- 2" |
21'-0" |
29'- 5" |
25'- 3"
|
21'-0" |
16'- 9"
|
| SJ-350
|
11-7/8" |
22'- 8" |
20'- 8" |
19'- 6" |
18'- 2" |
24'- 9" |
22'- 7" |
21'- 3" |
19'- 9"
|
| 14" |
25'- 9" |
23'- 6" |
22'- 2" |
20'- 8" |
28'- 2" |
25'- 8" |
24'- 2" |
19'- 9"
|
| 16" |
28'- 7" |
26'-1" |
24'- 7" |
22'-11" |
31'-3" |
28'- 6" |
24'- 9"
|
19'- 9"
|
| SJ-550
|
11-7/8" |
25'- 7" |
23'- 4" |
22'- 0" |
20'- 6" |
28'- 0" |
25'- 6" |
24'- 0" |
22'- 4" |
| 14" |
29'-1" |
26'- 6" |
24'-11" |
23'- 3" |
31'-10" |
28'-11" |
27'- 3" |
25'-5" |
| 16" |
32'- 3" |
29'- 4" |
27'- 8" |
25'- 9" |
35'- 3" |
32'-1" |
30'- 2" |
25'- 9"
|
Joists with Web Stiffeners attached at interior
supports
| Joist
Series |
Joist
Depth |
ON-
CENTER SPACING |
| Multiple
Span |
| 12"o/c |
16"o/c |
19.2"o/c |
24"o/c |
| SJ-150
|
9-1/2" |
|
|
|
|
| 11-7/8" |
|
|
|
17'- 5" |
| SJ-250
|
9-1/2" |
|
|
|
|
| 11-7/8" |
|
|
|
18'- 8" |
| 14" |
|
|
22'- 9" |
20'- 4" |
| 16" |
|
26'-10" |
25'- 4" |
20'- 4" |
| SJ-350
|
11-7/8" |
|
|
|
19'-10" |
| 14" |
|
|
|
22'- 7" |
| 16" |
|
|
26'-10" |
23'- 5" |
| SJ-550
|
11-7/8" |
|
|
|
|
| 14" |
|
|
|
|
| 16" |
|
|
|
26'- 9" |
Notes:
- Spans are based on glue-nailed sheathing. Adhesive shall
comply with specification AFG-01 of the American Plywood Association.
- Reduce spans 10" for nailed sheathing only.
- Spans are based on clear distance between supports.
Outermost spans in multiple span applications shall be at least 40% of adjacent span.
- Spans are based on 1-3/4" exterior reactions without
web stiffeners and 3-1/2" interior reactions without web stiffeners.
- The table extension above applies to joists with web
stiffeners at interior supports or joists without web stiffeners when supports are a
minimum of 5-1/4" wide.
| Web Stiffener and Nailing Schedule |
| Joist Series |
Joist Depths |
Stiffener |
Nails |
| SJ-150 |
9 -1/2" &
11-7/8" |
1/2" x 2-5/16"1
|
4-8d (clinched) |
| SJ-250 |
9 -1/2"
& 11-7/8" |
5/8" x
2-5/16"1 |
4-8d
(clinched) |
| 14"
& 16" |
5/8" x
2-5/16"1 |
5-8d
(clinched) |
| SJ-350 |
11-7/8" |
1" x 2-5/16"1
|
4-8d |
| 14" & 16" |
1" x 2-5/16"1 |
5-8d |
| SJ-550 |
All depths |
2x4 (min)2
|
4-10d |
Notes:
- Use plywood or OSB rated sheathing with face grain parallel
to long axis of the stiffener.
- Use solid-sawn Construction Grade or better.
|
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