Treated Lumber Span Chart Decks get wet and may be framed with incised treated lumber so spans may have to be adjusted. until a few years ago, the irc didn’t have deck joist span tables. but the 2015 irc included a new one (table r507.5) that will make it easy for deck builders to spec a joist size for a given span and joist spacing. To the span in inches divided by 360, and is based on live load only. the load duration factor, c d, is 1.0. listed spans are for wet service conditions, pressure treated southern pine floor deck joists, mc > 19%. check sources of supply for available grades and sizes. maximum spans were calculated using design values effective june 1, 2013.
Treated Lumber Span Chart Find here: framing span tables for decks, porches, other common building floor structures. deck beam span table. deck joist span table. deck joist rule of thumb. deck framing tables, codes, specifications. framing span tables for all types of wood construction, not just decks, are given separately. Joist span charts. ground snow load, live load = 40 psf, dead load = 10 psf, l Δ = 360. ground snow load, live load = 40 psf, dead load = 10 psf, l Δ = 360 at main span, l Δ = 180 at cantilever with a 220 pound point load applied to end. cantilevered spans not exceeding the nominal depth of the joist are permitted. The maximum allowable spans are significantly longer with steel joists. in fact, a 2x6 steel joist will provide the strength of roughly a 2x10 wood joist when it comes to allowable joist spans. to learn more about planning your deck with steel framing, give our team a call at 1 888 824 5316. 8' 10". 8' 3". 7' 10". assumes 40 psf live load, 10 psf dead load, l 360 simple span beam deflection limit, cantilever length l 180 deflection limit, no. 2 stress grade, and wet service conditions. size your deck beams and headers with our easy to use span table, which allows you to cross reference the post spacing and joist length to determine.
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