Deck Joist Span Chart - Fine Homebuilding
网页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. The table includes spans for common lumber species used for deck framing like southern pine, Douglas fir, hem-fir, redwood, western cedar and other species. The table accounts for wet service ...
How to Reinforce Ceiling Joists to Handle Heavy Loads
网页The recently completed 16- by 24-foot building has 2×4 walls and a roof with a 2×10 ridge and 2×6 rafters. It was only after the building was up did Leo realize he hadn’t figured in the added weight of the lumber on the ceiling joists. “The 16-ft. 2x6s are there to keep the 2×6 rafters from spreading,” he writes.
How Far Can a Deck Beam Span? - Fine Homebuilding
网页For example, a double 2×8 beam can span 8-ft.-9 in. when the deck joists are 6 ft. long. When the deck joists are 8 ft. long, the beam can span 7-7. When building a deck with 7-ft. joists, you know the beam can span somewhere between 7-7 and 8-0, but you don’t know exactly where. Check with your local code official, or simply drop back to ...
doubled 2x6 joist span - Fine Homebuilding
网页erick | Dec 12, 2005 11:08pm | #9. Ditto, with a properly sized beam down the middle doubled 2X6's should be fine. However , instead of sistering and worrying about properly connecting, they seem to still be adequate @ 8" o.c. (HF #2), basically dropping one in between, given 3/4" glued & screwed plywood.
Bearing Strength of 2x6 - Wood design and engineering - Eng-Tips
网页2005年7月13日 — The lumber is6" vertical, 2" horizontal (nominal). It is a wierd connection - the metal plates are on the 2" sides of the 2x6 (top and bottom) and the bolt is about 7" long, through the end of the 2x6's. The smooth holes are 2 1/2" from the ends of the 2x5's. I can check the metal plates for bearing and tension, and the net section of the 2x6 ...
Old House, 2x6 joists - Fine Homebuilding
网页2023年9月4日 — Where sixteen foot spans demand 2x10, the strength multiple is 1.5/2 * cube of (9.25/6). The multiple is 2.7. Again, if the structure had been built with more old growth real 2x6, a multiple of 2.0 would come with 6 1/2" between joists. A sistering new crummy 2x6 aiding only through nail attachment might give a multiple of 1.5, something ...
Using plywood in built-up beams - Fine Homebuilding
网页1995年1月1日 — To compare built-up wood beams, I multiply beam width by beam depth squared, and then I divide the product by 6. A triple 2×10 beam has a bending-resistance factor of 64.2; add plywood between the 2x10s, and the factor increases 15% to 73.7. A beam of four 2x10s and no plywood has 18% more bending resistance than three 2x10s …
6 x 6 or three 2 x 6's ? - Wood design and engineering - Eng
网页2021年9月26日 — RE: 6 x 6 or three 2 x 6's ? Mike Mike (Structural) 23 Oct 21 16:59 xtal - my gut says any of the 4 options will be fine. 6X6, (3) 2X6, (3) 1.5"X5.5" LVL, or steel. my gut says you should not buy the cheapest grade in the yard if you go with a sawn lumber option.
Dimensional shrinkage of pressure treated lumber.
网页2019年12月3日 — Dimensional shrinkage of pressure treated lumber. I’m building a deck to an existing elevation using 2 x 8 pressure treated lumber. It measures 7 1/2″ and the wood has a moisture content that ranges anywhere from 30% to 50% on these new boards with an average rating of near 35%. The small town home center said that the lumber was kiln …
The Right Header for Every Wall - Fine Homebuilding
网页The schedule calls for 16d common nails at 16 in. on center or 16d box nails at 12 in. on center. I run two rows of nails on 2×6 to 2×10 headers and add a third row in the middle of 2×12 headers. In 2×6 walls, I usually frame double headers by sandwiching 2-in. rigid foam between 13⁄4-in. LVL stock or 21⁄2-in. rigid foam between 2x stock.