first step: select a wood species. select your decking material. refer to the decking span table to determine what is the maximum distance that your chosen decking can span between joists.. for example 2x6 materials can usually span 24” without any noticeable deflection and still support a significant load.
the american wood council (awc) span calculator for wood joists and rafters (span calc) performs calculations for all species and grades of commercially available softwood and hardwood lumber as found in the 2012 national design specification (nds) for wood construction supplement: design values for wood construction with march 2012 and march 2013 addenda.
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
deck construction redwood is a wood like no other and decks built of redwood are unique in their beauty and long-lasting service. there’s a grade of redwood lumber for any part of any deck—luxury decks, economical decks, simple decks and decks that push the limits of the definition. deck building isn’t difficult. in fact, it’s a
codes specify maximum spans according to the type of wood used. a deck more than 2 feet or two steps above ground must have a railing. codes dictate how high the railing must be, as well as how far apart the balusters can be. small children must not be able to climb it. how to compute the spans for a deck.
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the canfor span calculator (span calculator) for wood joists and rafters performs calculations for four species and numerous grades of commercially available softwood lumber as found in the "2012