If you see a deck framed with 2x8 pressure treated lumber typically Southern Yellow Pine or SYP , spaced 16" o.c., 8" -2 x 2 = 12' = maximum allowable span for a generic "deck floor joist"
Span Tables for deck joists, deck beams, and deck flooring, giving Deck beam span table Deck joist span table Deck joist rule of thumb Deck Porch Construction Structural Fasteners Deck If you see a deck framed with 2x8 pressure treated lumber typically Southern Yellow Pine or SYP , spaced 16" o.c.,.
After submitting plans for a residential deck I was notified by the county plan checker that my choice of 2x6 pressure treated lumber as joist would require review by an engineer because the pressure treating process weakened the lumber so that the span tables in the UBC would not apply.
For pressure-preservative-treated southern pine no. 2 grade, there is a method that can be used for estimating beam spans for a preliminary design. When supporting joists that span 12 feet with no overhang beyond the beam, a double ply beam can span in feet a value equal to its depth in inches.
Step-by-step instructions and tips on how to frame a deck. Learn how to install treated wood joists and beams to build a strong deck. Deck Joist Sizing and Spacing. Measuring the 2x10 pressure treated joist length to prepare for cutting. Use a speed square to square off your joists.
DESIGNING A DECK - Beam and Joist Spans 2X6 24 o.c. 5 feet 9 inches You do NOT have to use pressure-treated beams on an outside deck. The following tables give the spans ONLY for HEM-FIR 2 OR BETTER. Designing a Deck.doc 5-26/17 Page 2 of 4
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%.
SIZE 2X6 24"OC 2X6 16"OC 2X8 24"OC 2X6 16"OC 2X8 24"OC 2X8 16"OC 2X10 24"OC 2X8 16"OC 2X10 24"OC 2X8 16"OC 2X10 24"OC treated for weather and/or ground exposure. Microsoft Word - Deck Span Table.doc Author: fred Created Date: 12/2/2005 8:27:08 AM
The structures of most decks in Canada are built with pressure treated wood made from Canadian lumber. That is an important detail as US and Canadian lumber use different span tables because the wood itself is different.
The 2015 IRC includes a new beam span table and illustrates specifically for decks. This will make it easier for deck builders to design a deck frame.
Sample Calculations for Using Joist Span and Beam Size CASE I SOLUTION: With a 12 deck span, the beam may be either two 2x8s or two 2x10s, depending on wood used. CASE II SOLUTION: Use a to determine joist size and a b to determine beam Treated for weather and/or ground exposure Post Spacing
Use this WeatherShield Prime Pressure-Treated Lumber for decks, play structures you get what you pay for. I did some research. For 2x6 - 12' , the local lumber yard wants about $3 more per board. For 16' lengths, about $4 more over 30% more . treated wood deck boards ground contact pressure treated lumber pressure treated lumber prime
For the new deck, I used pressure-treated framing lumber, of course, and installed composite decking and western red cedar guardrails. The refurbished deck got the same decking and guardrails plus some extra joists to support them.
Among lumber commonly available in pressure-treated form for deck framing, Douglas fir and Southern yellow pine are strongest, but Southern pine has more of a tendency to warp. Hem-fir is a designation that includes hemlock, fir, and other species that grow in the same stands.
pressure-treated wood for deck joists? I'm wondering whether we should be using pressure-treated wood for the joists and supports? Our contractor said that we did not need to use pressure-treated wood because it isn't in contact with the ground.