Deck Joist Span Charts - Floor Joist Tables
These deck joist span charts show you exactly how far your joists can span for safe deck construction. You'll find maximum spans for 2x4, 2x6, 2x8, 2x10, and 2x12 deck joists, along with beam and rim joist data.
What You'll Find:
- Maximum spans for all lumber grades (2x4, 2x6, 2x8, 2x10, 2x12)
- Load capacity for different joist spacing
- Beam span requirements
- Building code compliant span limits
Use these charts to pick the right joist size and spacing for your deck project while staying within code requirements.
Customize Input
Southern Pine Joist and rafters span table based on Dead Load: 10 psf Live Load: 40 psf and deflection limit of L/360
Max span calculations have been based on this RedX Apps Span Calculator.
| Southern Pine Joist and Rafters Max Span Table | |||||
|---|---|---|---|---|---|
| Lumber Grade | Nominal Size | Spacing O.C. | |||
| 12 in | 16 in | 19.2 in | 24 in | ||
| loading... | |||||
Douglas Fir Joist and rafters span table based on Dead Load: 10 psf Live Load: 40 psf and deflection limit of L/360
Max span calculations have been based on this RedX Apps Span Calculator.
| Douglas Fir Joist and Rafters Max Span Table | |||||
|---|---|---|---|---|---|
| Lumber Grade | Nominal Size | Spacing O.C. | |||
| 12 in | 16 in | 19.2 in | 24 in | ||
| loading... | |||||
Hem-fir Joist and rafters span table based on Dead Load: 10 psf Live Load: 40 psf and deflection limit of L/360
Max span calculations have been based on this RedX Apps Span Calculator.
| Hem-fir Joist and Rafters Max Span Table | |||||
|---|---|---|---|---|---|
| Lumber Grade | Nominal Size | Spacing O.C. | |||
| 12 in | 16 in | 19.2 in | 24 in | ||
| loading... | |||||
Spruce-pine-fir Joist and rafters span table based on Dead Load: 10 psf Live Load: 40 psf and deflection limit of L/360
Max span calculations have been based on this RedX Apps Span Calculator.
| Spruce-pine-fir Joist and Rafters Max Span Table | |||||
|---|---|---|---|---|---|
| Lumber Grade | Nominal Size | Spacing O.C. | |||
| 12 in | 16 in | 19.2 in | 24 in | ||
| loading... | |||||
Disclaimer:
While every effort has been made to insure the accuracy of the information presented, and special effort has been made to assure that the information reflects the state-of-the-art, RedX Technology nor its members assume any responsibility for any particular design prepared from this Span Calculator. Those using this Span Calculator assume all liability from its use.