2 1/2 x 9" bolts will do, 12" down the 6x6 and cover the 2x8s. I use double 2x8's for beams all day long and notch the 6x6, just have to drill more post holes, you not gaining that much more beam span.
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
That means these joists can span the 12-foot depth of the deck, and the beam can be located at the perimeter. Nine joists will be needed for the 16-foot width. I prefer to double the outside joists, as do some deck builders, which adds 2 joists, for a total of 11. Can we meet minimum code requirements but save money by using smaller 2x8
The UBC deck joist sizes and span table vs the IRC deck joist size span table that we use for Northern California Deck Stairs Tutorial Stair Table Deck Connections Deck Joist Spans Deck Beams and Posts Deck Footings and Piers. The cantilever overhang can be 1/4 the joist length, but again I would keep that to 2'-6 max. for 2x8. Deck
Beam Span Calculator For help, simply click on the beside the section you need help with, watch this Tutorial Video. Lumber Species Southern Pine Douglas Fir Douglas Fir-Larch Hemlock-Fir Spruce-Pine-Fir Redwood Western Cedar Ponderosa Pine Red Pine
Joist associated with Free-standing decks Beam Span 8-0 Max. Beam Span 8 0 Maximum Joist Spans and Beams Sizes Joist Size Joist Spacing Max. Joist Span All Conditions Beam Size Simple Span Joists Beam Size Overhanging Joists 2x6 2x6 2x8 2x8 2x10 2x10 2x12
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.
What is the maximum span for 2x8 joists? Report This by Manage My Life. April 26th, 2007. Our house has 2x10 joists under the 1st floor, 2x8s under the 2nd, and 2x6s under the 3rd all rough sized . The same wall runs perpendicular to the joists on all 3 floors, but not the basement. I'm trying to figure out whether this is a load bearing wall.
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.
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.
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 .
In decks that extend more than 16 out from the house, a similar beam is installed, 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.
What is the greatest distance that 2x8 beams can be apart on a deck? I and 39;m building a deck, And am using 2x8 and 39;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?