The 2015 IRC includes a new deck joist span table and illustrations specifically for decks. This will make it easier for deck builders to design a
Deck beam span table Deck joist span table Deck joist rule of thumb Deck basics of locating and installing the deck ledger in our online deck design-build guide.
Joist length prescriptively limited to 18'-0" for footing design. Figure 1A. Dimension Lumber Deck Beam Spans LB 1 for Joists Framing from One Side Only.
DESIGNING A DECK - Beam and Joist Spans. Please refer to the attached drawings for designing a deck and verify with your local planning/zoning department
Five basic components make up any deck: decking, joists and when attached to a plans, and construction will be easier if you plan your deck with this in mind.
Learn how to size your deck beam using this easy-to-use span table. Just cross-reference the post spacing and joist length to determine the beam size. there is a method that can be used for estimating beam spans for a preliminary design.
Find out how far your deck joists can span when framing your deck. Choose from Southern Pine, Ponderosa Pine and Western Cedar and from 2x6 up to 2x12
Consider span, spacing, and depth to build beyond code for a small upcharge. When I was a builder, I built residential decks based on a 70-psf design load