Prescriptive Residential Wood Deck Construction Guide
Use Table 2 to determine allowable joist span, L J, based on lumber size and joist spacing. Joist span, L, must be less than or equal to allowable joist span, L J. Overhang length is the lesser of allowable overhang, L O, or one fourth the joist span, L/4. See Figure 1 and Figure 2 for joist span types.
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