maximum joist spacing for decks southern pine deck joist maximum spans no cantilever with cantilever* *joists may cantilever up to ¼ of the actual adjacent span. for example, a 2 x 12 joist placed 16” oc. spanning 16’-6” between supports may cantilever up to an additional 4’-1 ½” for a total maximum length
the layout term for joists is “on center,” which is the center-to-center measurement from one joist to the next. most decks use 16" on center spacing for joists. most decking is not strong enough to support longer spans than 16". some builders reduce joist spacing to 12" on center to strengthen the deck frame or to increase maximum
check deck joist spacing. if you’re planning to replace old wood decking with pvc or composite, measure the deck joist spacing first. most deck joists are centered 16 in. apart, which is the maximum deck joist spacing for most low-maintenance decking. if you plan to install your decking at a 45-degree angle, your joists may need to be 12 in
i am getting ready to add 2 new decks to my house using some sort of composite decking. i’ve gone to the websites of several brands (boardwalk, seven trust, evergrain, choicedeck, seven trust, nexwood, eon, ezdeck, and others) to determine waht the best joist spacing is.
the decking will be ran 90 which 16" oc is listed as max joist spacing on the seven trust website. my question is, should i frame the other side 16" oc or change it to 12" oc? for questions regarding structure, the rims are 2x10, split by 2 2x12's, the joists are 2x8s and will be cross braced.