4 x 4 #2 rafters, pine max span - The Building Code Forum
Mar 31, 2010 · I tried it with new post 6/1/12 allowable design values and had an adjusted Fb of 1509 psi, which required a rafter section modulus of 10.89"3 remember a 4x4 is 7.146"3. But the controlling factor is deflection, the new E value is 1.4 million psi giving a deflection of 2.56".
Rafters 4 feet on center | The Building Code Forum
Oct 22, 2009 · 362. Location. N/E Indiana. Jul 17, 2023. #1. An owner wants to put a lean-to onto an existing building. He has proposed rafter at 4 foot on center with 2x4 flat purlins for roof decking. Since there are no guidelines in the Residential Building Code, is there any available standards for this.
double 2x8 spans - The Building Code Forum
Oct 19, 2009 · double 2x8 spans | The Building Code Forum. Welcome to the new and improved Building Code Forum. We appreciate you being here and hope that you are getting the information that you need concerning all codes of the building trades. This is a free forum to the public due to the generosity of the Sawhorses, Corporate Supporters and Supporters who ...
Joist Span Table for 2" by 6" LVL joist - The Building Code Forum
Feb 27, 2023 · With a bit of reasonable extrapolation, you can do this via the span tables. Start with 2018 IRC table R802.4.1 (2), which is a span table (for rafters) for 20 psf live load, 10 psf dead load, and L/240 deflection. It tells us that (if douglas fir is your preferred species) DF #1 2x6 @ 24"o.c. will span 12'-6".
Span charts for girders for ceiling only? - The Building Code Forum
Oct 21, 2009 · Aug 26, 2011. #5. A girder is one type of beam, just as joists and rafters are types of beams. Having a program from a code referenced authority would be helpful, just as their spancalc carries some authority and links in very well with the parameters of …
Hip and Valley Rafter Sizing - The Building Code Forum
Oct 16, 2009 · Just received a response from an engineer rebutting an inspection report for a contractor. He stated that the hip and valley rafters were compliant with Table R802.5.1. This is not the first time we have had someone refer to this table. In our opinion, we believe that the only table we know of that prescriptively covers hip and valley rafters ...
Stair Stringer Design and Configuration - The Building Code Forum
Jan 31, 2022 · Using the 2x6 span chart ignores the incised cut which causes the member to be weaker than an uncut member under uniform load on a flat plane, the required concentrated load and the heavier dynamic load exerted by the user. Then consider that field cut stringers are almost always over cut to make the full cut.
2x6 span 16’ | The Building Code Forum
Dec 20, 2023 · Yeah so Yankee Chronicler is pretty spot on, I looked at the span charts, but, depending on the amount of 2x6s that have to span 16ft the building inspector may be a little forgiving if it’s just a few. I definitely think they would probably say put them on 8” centers. But if that’s a no go you will have to get a letter from an engineer ...
A Look Back: The Evolution of Southern Yellow Pine Span Table
Oct 16, 2009 · In 1991 Southern Pine strengths were reduced depending on the depth of a member, based on In-Grade testing of full-size samples of commercially produced lumber. I've always specified Fb = 1200 PSI and E = 1,500,000 PSI. #2 SP met these strengths before 1991. After 1991 I had to change my specs to #2 Dense or #1 to achieve these strengths.
A question about vigas | The Building Code Forum
Sep 5, 2024 · The NM residential building code was recently revised to include a span chart specifying the number and span of vigas based on the nominal diameter mid-span with a minimum of 5 in diameter. The code refers to the Section R802.1.3 Structural log members, which states that the log members must comply with the provisions of ICC 400, and adds the ...