| SOUTHERN
PINE SPAN TABLES |
Maximum spans given in feet and inches
Inside to inside of bearings |
Tables 5 thru 11 are abbreviated span tables for the most
commonly available grades of Southern Pine lumber. For other grades, loading conditions
and spacings, refer to Maximum Spans for Southern Pine Joists and Rafters published by the
Southern Pine Council.
These spans are based on 1993 AF&PA Span Tables for
Joists and Rafters, and 1994 SPIB Standard Grading Rules for Southern Pine Lumber.
Except for Table 8, they are intended for use in covered structures or where the moisture
content in use does not exceed 19 percent for an extended period of time.
| Design Criteria: |
Deflection - limited to span in inches divided
by 360 (live load only). |
|
Strength - based on 30, 40, or 50 pounds per
square foot (psf) live load, plus 10 psf dead load. |
| |
Size (inches) and Spacing (inches on center) |
|
|
2 x 6 |
2 x 8 |
2 x 10 |
2 x 12 |
| Grade |
Live Load |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
| No.1 |
30 psf |
12-0 |
10-11 |
9-7 |
15-10 |
14-5 |
12-7 |
20-3 |
18-5 |
16-1 |
24-8 |
22-5 |
19-6 |
| 40 psf |
10-11 |
9-11 |
8-8 |
14-5 |
13-1 |
11-5 |
18-5 |
16-9 |
14-7 |
22-5 |
20-4 |
17-5 |
| 50 psf |
10-2 |
9-3 |
8-1 |
13-5 |
12-2 |
10-8 |
17-1 |
15-6 |
13-4 |
20-9 |
18-10 |
15-11 |
| No. 2 |
30 psf |
11-10 |
10-9 |
9-4 |
15-7 |
14-2 |
12-4 |
19-10 |
18-0 |
14-8 |
24-2 |
21-1 |
17-2 |
| 40 psf |
10-9 |
9-9 |
8-6 |
14-2 |
12-10 |
11-0 |
18-0 |
16-1 |
13-2 |
21-9 |
18-10 |
15-4 |
| 50 psf |
9-11 |
9-1 |
7-9 |
13-1 |
11-11 |
10-0 |
16-9 |
14-8 |
12-0 |
19-10 |
17-2 |
14-0 |
| No. 3 |
30 psf |
10-5 |
9-1 |
7-5 |
13-3 |
11-6 |
9-5 |
15-8 |
13-7 |
11-1 |
18-8 |
16-2 |
13-2 |
| 40 psf |
9-4 |
8-1 |
6-7 |
11-11 |
10-3 |
8-5 |
14-0 |
12-2 |
9-11 |
16-8 |
14-5 |
11-10 |
| 50 psf |
8-6 |
7-5 |
6-0 |
10-10 |
9-5 |
7-8 |
12-10 |
11-1 |
9-1 |
15-3 |
13-2 |
10-9 |
| Table 6 Ceiling
Joists - Drywall Ceiling |
| Design Criteria: |
Deflection - limited to span in inches divided
by 240 (live load only). |
|
Strength - based on 10 or 20 pounds per square
foot (psf) live load, plus 5 or 10 psf dead load. |
|
Size (inches) and Spacing (inches on center) |
|
|
2 x 4 |
2 x 6 |
2 x 8 |
2 x 10 |
| Grade |
Live Load |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
| No.1 |
10 psf |
12-8 |
11-6 |
10-0 |
19-11 |
18-1 |
15-9 |
26-0 |
23-10 |
20-10 |
26-0* |
26-0* |
26-0* |
| 20 psf |
10-0 |
9-1 |
8-0 |
15-9 |
14-4 |
12-6 |
20-10 |
18-11 |
15-11 |
26-0* |
23-2 |
18-11 |
| No. 2 |
10 psf |
12-5 |
11-3 |
9-10 |
19-6 |
17-8 |
15-6 |
25-8 |
23-4 |
20-1 |
26-0* |
26-0* |
24-0 |
| 20 psf |
9-10 |
8-11 |
7-8 |
15-6 |
13-6 |
11-0 |
20-1 |
17-5 |
14-2 |
24-0 |
20-9 |
17-0 |
| No. 3 |
10 psf |
11-7 |
10-0 |
8-2 |
17-1 |
14-9 |
12-1 |
21-8 |
18-9 |
15-4 |
25-7 |
22-2 |
18-1 |
| 20 psf |
8-2 |
7-1 |
5-9 |
12-1 |
10-5 |
8-6 |
15-4 |
13-3 |
10-10 |
18-1 |
15-8 |
12-10 |
| Table 7 Floor
Joists - Heavy Live Loads |
| Design Criteria: |
Deflection - limited to span in inches divided
by 360 (live load only). |
|
Strength - based on 75,100,125 or 150 pounds
per square foot (psf) live load, plus 10 psf dead load. |
| |
Size (inches) and Spacing (inches on center) |
| |
|
2 x 6 |
2 x 8 |
2 x 10 |
2 x 12 |
| Grade |
Live Load |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
12" oc |
16" oc |
24" oc |
| No.1 |
75 psf |
8-10 |
8-1 |
7-1 |
11-8 |
10-8 |
9-3 |
14-11 |
13-7 |
11-3 |
18-2 |
16-4 |
13-4 |
| 100 psf |
8-1 |
7-4 |
6-5 |
10-8 |
9-8 |
8-4 |
13-7 |
12-1 |
9-10 |
16-6 |
14-5 |
11-9 |
| 125 psf |
7-6 |
6-10 |
5-11 |
9-10 |
9-0 |
7-6 |
12-7 |
10-11 |
8-11 |
15-0 |
13-0 |
10-7 |
| 150 psf |
7-1 |
6-5 |
5-6 |
9-3 |
8-5 |
6-11 |
11-7 |
10-0 |
8-2 |
13-9 |
11-11 |
9-9 |
| No. 2 |
75 psf |
8-8 |
7-11 |
6-6 |
11-6 |
10-4 |
8-5 |
14-3 |
12-4 |
10-1 |
16-8 |
14-5 |
11-9 |
| 100 psf |
7-11 |
7-0 |
5-9 |
10-5 |
9-1 |
7-5 |
12-6 |
10-10 |
8-10 |
14-8 |
12-8 |
10-4 |
| 125 psf |
7-4 |
6-4 |
5-2 |
9-6 |
8-2 |
6-8 |
11-4 |
9-9 |
8-0 |
13-3 |
11-5 |
9-4 |
| 150 psf |
6-9 |
5-10 |
4-9 |
8-8 |
7-6 |
6-2 |
10-5 |
9-0 |
7-4 |
12-2 |
10-6 |
8-7 |
| No. 3 |
75 psf |
7-2 |
6-2 |
5-1 |
9-1 |
7-11 |
6-5 |
10-9 |
9-4 |
7-7 |
12-10 |
11-1 |
9-1 |
| 100 psf |
6-4 |
5-5 |
4-5 |
8-0 |
6-11 |
5-8 |
9-5 |
8-2 |
6-8 |
11-3 |
9-9 |
7-11 |
| 125 psf |
5-8 |
4-11 |
4-0 |
7-3 |
6-3 |
5-1 |
8-6 |
7-5 |
6-0 |
10-2 |
8-10 |
7-2 |
| 150 psf |
5-3 |
4-6 |
3-8 |
6-8 |
5-9 |
4-8 |
7-10 |
6-9 |
5-7 |
9-4 |
8-1 |
6-7 |
* The listed maximum span has been limited to 26' -
0" based on material availability. Check sources of supply for lumber longer than
20'. |
