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Lumber Span Charts |
For everything
you ever wanted to know about lumber, visit wwpa.org
Sleeping
Rooms and Attics: 30 PSF Live, 10PSF
Dead
#2 & Btr L/360 |
| 2X6 |
2X8 |
2X10 |
2X12 |
| |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
| SPF |
10-5 |
9-6 |
13-9 |
12-6 |
17-6 |
15-11 |
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| Hem-Fir |
11-0 |
10-0 |
14-6 |
13-2 |
18-6 |
16-10 |
22-6 |
19-8 |
All
Residential Rooms Except Sleeping Rooms and Attics: 40
PSF Live, 10PSF Dead
#2 & Btr L/360 |
| 2X6 |
2X8 |
2X10 |
2X12 |
| |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
| SPF |
9-6 |
8-7 |
12-6 |
11-4 |
15-11 |
14-6 |
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| Hem-Fir |
10-0 |
9-1 |
13-2 |
12-00 |
16-10 |
15-2 |
20-04 |
17-7 |
Residential
Exterior Decks and Balconies: 60 PSF
Live, 10PSF Dead
#2 & Btr or Sel #1 as labeled L/360 |
| 2X6 |
2X8 |
2X10 |
2X12 |
| |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
| P.T.
SYP |
10-2
#1 |
9-3
#1 |
10-11
#2 |
9-11
#2 |
13-11
#2 |
12-3
#2 |
17-5
#1 |
15-1
#1 |
Ceiling
Joist (Drywall
- No future rooms & limited attic storage) : 20
PSF Live, 10PSF Dead
#2 & Btr L/240 |
| 2X6 |
2X8 |
2X10 |
2X12 |
| |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
| SPF |
13-8 |
12-5 |
18-0 |
16-4 |
22-11 |
20-10 |
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| Hem-Fir |
14-5 |
13-1 |
19-0 |
17-3 |
24-3 |
21-11 |
29-4 |
25-5 |
Roof
Rafters (Med. roof covering, drywall,
no attic space. Roof slope greater than
3:12) : 30 PSF Live, 15PSF Dead
#2 & Btr L/240 |
| 2X6 |
2X8 |
2X10 |
2X12 |
| |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
12" o.c. |
16" o.c. |
| SPF |
11-11 |
10-7 |
15-6 |
13-5 |
18-11 |
16-4 |
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| Hem-Fir |
12-7 |
11-1 |
16-2 |
14-0 |
19-10 |
17-2 |
22-11 |
19-11 |
| All
information taken from WWPA's Western Lumber
Span Tables (572). Always
verify with township building inspector or engineer
prior to building to insure that these spans
are correct for your application. |
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