![]() ![]() It's not rocket science.īerkeley, CAThanks Mr. The contractors I've dealt with can size the joists as well as I can if they do the research like the original poster appears to have done. If the inspector knows what he is checking/inspecting, he can verify the submission with little time or math. I am surprised that the inspector won't accept a reasoned calculation from a contractor. While the differences are not large, they do affect maximum spans. Thus, there is no agreed on Fb, E, Fv, etc among the different versions to be able to produce a general LVL table, only product specific. One of the problems in finding an LVL table for joists is that different manufacturers produce LVL material to slightly different strengths and stiffnesses. Sometimes I want the engineer's stamp in the job file for a fix. Beyond that point they basically want an engineer's stamp on a piece of paper.įrankly, I have invited correction notices for some jazz I've had to perform that the inspector was ready to applaud. I believe Dick referred to that binary contrast- up to a point (and on a good day) all kinds of improvisation is ok. That said, if the inspector likes your work, they often will allow all kinds of creative solutions without any documentation/justification at all. #Lvl span table calculator code#No? If not, why not?My experience with the inspectors around here is that they will accept written evidence from GC's only if it is from prescriptive code sources.Īnything (even only slightly) beyond that and they reflexively shut down and say: "have the engineer write a letter/stamp a drawing" and/or "submit a revision to the plan-checker". ) but also commodity lumber (#2 SPF, #1 SYP, #1&2 Hem-fir. You must realize, if you have looked at the Forte software, that Forte can analyze joists, and do it using not just the family of Weyerhaeuser engineered wood products (LVL, LSL, Paralam. #Lvl span table calculator how to#I am a structural engineer, and cannot explain to my wife how to calculate miles per gallon.Īsk him if he will accept an engineer's work to validate which size LVL is appropriate. I can understand where he is coming from. ![]() Total load, and deflection-controlled loadings are covered.īut maybe this math is beyond him. The Weyerhaeuser Specifiers Guide document shows what single-ply LVLs, acting as floor beams, can handle, all for various spans. For sleeping rooms at 30 psf live and say 12 psf dead, your joist needs to be able to handle a 40 plf live load and a 16 plf dead load. If it is one of a grid in which the spacing is 16 inches, each foot of it is carrying 16/12 or 1-1/3 square feet of area. But you have an obligation to try, to see if he can understand that a floor joist is just a beam with an end to end uniform load on it. You can show him the Weyerhaeuser beam loading data all day, and he won't accept it. One that includes readily available engineered lumber products, called out in sizes he knows. Your problem is that whoever you answer to, this inspector or whatever, won't accept anything other than the span chart.Īnd a span chart that he can understand. ![]()
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