Home / span of 2x 8 deck beams
A look at an actual current joist span table will show that depending on the wood species, the allowable spans for a 2x8 floor joists with 40 pound live load with deflection limit of span/360, ranges from 10'5" Western red cedar to 12'9" Doug fir-larch .
The appropriate spans for deck beams and joists are determined in part by the weight loads that the deck will have to bear. The so-called dead load is the weight of the deck structure itself
What is the greatest distance that 2x8 beams can be apart on a deck? I'm building a deck, And am using 2x8's for the beams, doubled up so that the posts are sandwiched between the two. What is the greatest distance that each set of beams can be from each other off center?
The span of a beam is dependent on a few variables. The species of lumber, size of lumber and the load it carries. Fewer posts on upper level decks are typically more desirable to the occupants and this drives the use of larger framing materials for longer spans.
The UBC deck joist sizes and span table vs the IRC deck joist size span table that we use for Northern California Deck Connections Deck Joist Spans Deck Beams
The Deck Beam Span Determines The Strength of Your Deck Plan in advance by knowing the correct deck beam span to use. During your planning stage, dont forget to consider the spacing for your beams.
The span table used in our area for 2011 is the UBC 1997 code left for the minimum size of joists for decks. These joist spans tables don't take into account the wet conditions. The IRC deck joist span table
Installing 2x8 Deck Beams. parallel to the house, at 16 so that joist ends can overlap on top of the beam, since 16 is the span limit of 2x8 joists.
IRC in the most restrictive condition allows a maximum span of 8'4" for a 2x8 joist made of redwood, western cedar, ponderosa pine, or red pine. Since you did not mention which way you were going to run the joists, if you need a 10 foot span you would need either a 2x8 or a 2x10, depending on the species of lumber you use.
The 2015 IRC includes a new table R507.6 Deck Beam Spans Lengths. The table makes it easier for deck builders to accurately size deck beams and for inspectors to check decks for adequate framing. Sizing deck beams got a lot easier when the 2015 IRC came out. Deck builders can now refer to Section
That means these joists can span the 12-foot depth of the deck, and the beam can be located at the perimeter. If we then compare that 2x8 layout with our base
In general terms, joists spaced 16 inches on center can span 1.5 times in feet their depth in inches. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. The larger the deck, the larger the joists.
Joist associated with Free-standing decks Simple Span Joists Beam Size Overhanging Joists 2x6 2x6 2x8 2x8 2x10
Re: Tripple 2x8 Beams On 6x6 Post Whew, I'm starting to price in stainless hardware for all the coastal areas and the thought of another $26 per post made me wince. Not that it really adds that much to a $15-20k deck .
2X8 12-1 10-10 8-10 14-2 12-10 11-0 12-1 11 Sample Calculations for Using Joist Span and Beam Size With a 12 deck span, the beam may be either two 2x8s or