Use historic cedar dimensions as background information, not as a substitute for current engineering, code or manufacturer data.
Nominal and actual dimensions
The restored archive listed historic examples such as 5/4-by-4 clear decking at a 16-inch span, knotty material of that size at a shorter span, and nominal 2-by decking at wider spacing. Those figures reflected specific assumptions about continuous spans, loading and wet-service conditions.
Historic decking span information
They are educational context only. Current design values, product grade, actual dimensions, loading, code, joist layout and manufacturer information must control a real project.
Joist spacing and product choice
Joist spacing and product choice should be considered in relation to the complete deck rather than as a single isolated choice. Exposure, intended use, material condition and surrounding construction affect the result.
For an actual New Jersey project, current product instructions, verified site conditions and municipal requirements take priority over historic examples or generalized rules. Document decisions in the material schedule and project scope.
Estimating linear footage
Estimating linear footage should be considered in relation to the complete deck rather than as a single isolated choice. Exposure, intended use, material condition and surrounding construction affect the result.
For an actual New Jersey project, current product instructions, verified site conditions and municipal requirements take priority over historic examples or generalized rules. Document decisions in the material schedule and project scope.
Historic reference table
| Nominal decking | Historic example | Important limitation |
|---|---|---|
| 5/4 × 4 clear | 16 in. | Specific grade and loading assumptions |
| 5/4 × 4 knotty | 12 in. | Not a universal current design value |
| 5/4 × 6 | 16 in. | Verify grade, orientation and product data |
| 2 × 4 or 2 × 6 | 24 in. | Current code and design control |
Frequently asked questions
Can this guide replace a permit plan?
No. It provides planning context only. A real project must use verified dimensions, current code and required professional or municipal review.
Can historic cedar recommendations still be useful?
Yes, as background on material behavior and terminology. Current supplier data and adopted requirements take priority.
Where can I request a New Jersey deck conversation?
Use the project request page and chat to share the property location, material and project stage.
Request a deck project conversation
Use the guide to organize questions, then share your New Jersey property and project scope.
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