NOTE: All spans listed here are based upon current design values. Click here for information regarding spans based upon proposed new design values.
Joists & Rafters
Simplified maximum span tables for selected visual and mechanical grades of Southern Pine lumber in sizes 2x6 thru 2x12. Listed are 46 tables based on common loading conditions for floor joists, ceiling joists and rafters.
Headers & Beams
Simplified span tables for Southern Pine lumber and glued laminated timber (glulam) headers, beams and girders.
These easy-to-use tables were compiled by the Southern Forest Products Association (SFPA) as a service to design/build professionals and other Southern Pine users.
SFPA does not grade or test lumber, and accordingly, does not assign design values to Southern Pine lumber. The design values contained herein are based on the Southern Pine Inspection Bureau's Standard Grading Rules for Southern Pine Lumber and modified as required by the American Wood Council's National Design Specification® (NDS®) for Wood Construction. Accordingly, neither SFPA, nor its members, warrant that the design values on which the span tables for Southern Pine lumber contained herein are based are correct, and specifically disclaim any liability for injury or damage resulting from the use of such span tables.
The conditions under which lumber is used in construction may vary widely, as does the quality of workmanship. Neither SFPA, nor its members, have knowledge of the quality of materials, workmanship or construction methods used on any construction project and, accordingly, do not warrant the technical data, design or performance of the lumber in completed structures.

Joists & Rafters
Please click on the Table Number below to download the maximum span table of your choice. Also see Using These Tables and our examples of how to read the table values and more.
Click on Southern Pine Maximum Spans for Joists & Rafters to download the complete publication with explanatory text and all 46 tables.
| Table Number | Live Load(psf) | Dead Load(psf) | Deflection Limit |
| Floor Joists | |||
|
1 2 3 4 5 6 7 8 9 10 11 |
30 40 50 60 40 50 60 75 80 90 100 |
10 10 10 10 20 20 20 10 10 10 10 |
360 360 360 360 360 360 360 360 360 360 360 |
| Wet-Service Floor Joists (MC > 19%) | |||
|
12 13 14 |
40 60 100 |
10 10 10 |
360 360 360 |
| Ceiling Joists | |||
|
15 16 |
10 20 |
5 10 |
240 240 |
| Rafters (Snow Load, CD = 1.15) | |||
|
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 |
20 30 40 50 20 30 40 50 20 30 40 50 20 30 40 50 20 30 40 50 20 30 40 50 |
10 10 10 10 15 15 15 15 20 20 20 20 10 10 10 10 15 15 15 15 20 20 20 20 |
240 240 240 240 240 240 240 240 240 240 240 240 180 180 180 180 180 180 180 180 180 180 180 180 |
| Rafters (Construction Load, CD = 1.25) | |||
|
41 42 43 44 45 46 |
20 20 20 20 20 20 |
10 15 20 10 15 20 |
240 240 240 180 180 180 |
| MC = Moisture Content | CD = Load Duration Factor | ||