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  Willamette StrucJoist SJ-32-42-55 StrucJoist SJ-32-42-55 - Page 3
| Floor Spans Joists without web stiffeners |
TABLE I |
Live Load = 40 psf Dead Load = 12 psf
LL Defl = L/480 |
| |
|
ON - CENTER SPACING |
| Joist Series |
Joist Depth |
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-32 |
9-1/2" |
18'- 2" |
16'- 7" |
15'- 7" |
14'-1" |
19'-11" |
17'- 4" |
15'- 9" |
14'-1" |
| 11-7/8" |
21'- 9" |
19'- 9" |
18'- 3" |
16'- 4" |
23'- 2" |
20'- 0" |
18'- 3" |
16'-4" |
| 14" |
26'-1 " |
23'- 9" |
22'- 4" |
20'- 9" |
28'- 7" |
25'-11" |
23'-10" |
19'- 0" |
| 16" |
29'- 0" |
26'- 4" |
24'-10" |
22'-11" |
31'- 8" |
28'- 8" |
23'-10" |
19'- 0" |
| SJ-42 |
9-1/2" |
21'-3" |
19'- 3" |
18'-1" |
16'-10" |
23'- 2" |
21'-0" |
19'- 9" |
17'-1" |
| 11-7/8" |
25'- 4" |
23'- 0" |
21'-7" |
20'- 0" |
27'- 8" |
25'-1 " |
23'- 7" |
21'-8" |
| 14" |
28'- 9" |
26'-1 " |
24'- 7" |
22'- 9" |
31'- 5" |
28'- 6" |
26'-10" |
23'- 0" |
| 16" |
31'-11" |
28'-11 " |
27'- 3" |
24'- 6" |
34'-10" |
31'- 7" |
28'-10" |
23'- 0" |
| SJ-55 |
11-7/8" |
26'- 4" |
23'-11" |
22'- 6" |
20'-11" |
28'- 9" |
26'- 2" |
24'- 7" |
22'-10" |
| 14" |
29'-11" |
27'- 2" |
25'- 7" |
23'- 9" |
32'- 9" |
29'- 9" |
27'-11" |
25'- 9" |
| 16" |
33'- 2" |
30'- 2" |
28'- 4" |
26'- 4" |
36'- 3" |
32'-11 " |
31'-0" |
25'- 9" |
Notes:
- All spans shown in the tables above are appropriate without
web stiffeners at supports. Spans shown in shaded portion of the table can be increased
with the addition of web stiffeners at interior supports (See table below).
- Spans are based on glued/nailed 3/4" nominal 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 application must be at
least 40% of adjacent span.
Web stiffeners:
SJ-32 1" X 2-5/16" net minimum
SJ-42 2 x 3 nominal minimum
SJ-55 2 x 3 nominal minimum
TABLE II
| Floor
Spans Joists with Web Stiffeners
attached at interior supports |
Live Load = 40 psf Dead Load = 12 psf LL Defl = L/480 |
| Joist Series |
Joist Depth |
ON - CENTER SPACING
|
| Multiple Span |
| 12"o/c |
16"o/c |
19.2"o/c |
24"o/c |
| SJ-32 |
9-1/2" |
|
|
|
|
| 11-7/8" |
|
|
|
|
| 14" |
|
|
24'-5" |
22'-1" |
| 16" |
|
28'-10" |
26'-9" |
22'-10" |
| SJ-42 |
9-1/2" |
|
|
|
|
| 11-7/8" |
|
|
|
|
| 14" |
|
|
|
23'- 8" |
| 16" |
|
|
29'-7" |
23'- 8" |
| SJ-55 |
11-7/8" |
|
|
|
|
| 14" |
|
|
|
25'-11" |
| 16" |
|
|
|
26'- 9" |
Note:
- This table is applicable to joists with web stiffeners at
interior supports or joists without web stiffeners when interior supports are a minimum of
5-1/4" wide.
| Please see the SJ-32 SJ-42 SJ-55 Installation Guide for
additional information. |
|
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