Deck Joist Span Charts & Tables
These planning values are for quick reference—confirm with official span tables for your jurisdiction.
| Size | Spacing | Wood | Allowable span |
|---|---|---|---|
| 2x8 | 16″ | SYP | 11′2″ |
| 2x10 | 16″ | SYP | 14′2″ |
| 2x12 | 16″ | SYP | 16′6″ |
Legal Notice & Disclaimer
Planning tool only. Results and charts on this site are simplified planning aids. They are not a substitute for stamped engineering, permits, or inspections. Always confirm with local building officials and product manufacturers.
No warranties. This site is provided “as is,” without warranties of any kind. We disclaim liability for any loss or damage arising from its use.