Complete Deck Joist Guide (2024)
Updated
Overview of sizing, spacing, blocking, cantilevers, and materials with practical notes and planning tips.
Use the Joist Spacing Calculator and Joist Span Calculator to validate the plan.
Quick Span/Spacing Reference
| Spacing | 2x6 | 2x8 | 2x10 | 2x12 |
|---|---|---|---|---|
| 16″ | 9.5 | 11.2 | 14.2 | 16.6 |
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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.
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