IRC adoption & local amendments
Many municipalities adopt the IRC with amendments. Consult your local building department for current requirements.
Local lumber availability
Availability and pricing vary by region; verify spans based on species/grade actually stocked nearby.
Climate considerations
Account for moisture, freeze-thaw cycles, and wind where applicable.
Permit requirements
Most decks require a permit. Submit plans including framing layout, joist spans, beam sizing, and connections.
Tools & resources
Resources
Legal Notice & Disclaimer
Planning tool only. Results and charts on this site are simplified planning aids based on common assumptions. 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.