Deck Joist Span Chart
A full visual chart of maximum joist spans and overhangs from AWC DCA 6-15 Table 2. Prefer the interactive tool? Open the deck joist span calculator on the home page.
Deck joist span chart / table (AWC DCA 6)
Full Table 2 values: three species groups × four sizes × three spacings, with span and overhang.
Source: AWC DCA 6-15 PDF, Table 2.
How to read this deck joist span chart
Each row is one joist size under one species group. The first three numeric columns are allowable clear spans at 12″, 16″, and 24″ on center. The next three are allowable overhangs for the same spacing. Always take the lesser of the overhang cell and L/4 of your actual span.
For a printable-style layout with the same numbers, see the deck joist span table. Size-specific pages: 2x6, 2x8, 2x10, 2x12.