Deck Post & Footing Sizer

Sizing for deck posts, footings, and beam spans per IRC.

Deck area (SF)Live load (psf)Soil bearing (psf)

Result

Total load

9000 lb

Footing side

2.12 ft

Diameter (round)

25 in

About this tool

Input deck area, joist span, and live load to get post spacing, footing diameter, and beam recommendation. Targets r/Decks recurring 'footing size for a 12x12 deck' threads.

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