![]() ![]() Never try to buck the code to please the owner - it can be very expensive, I know. Better to smile and say yes sir and follow the code. It isn't fun to tear something out and replace. From past experience, never use anything that doesn't have a grade stamp or has been approved by an engineer. Sounds like he's being (overly) cautious to me (or covering his butt) - the span and loading are such small values.īeing a builder in Oregon, I can say they (building inspectors) are very strict. "I need a table of comparison for the building inspector." Building code manuals (are you under the IRC code?) have tables for header sizes, and the strength characteristics for the clear species you mention would seem to exceed those of standard SPF lumber typically considered for code span tables. In my experience, using gluelams for a 5 foot span in a single story residential structure would be like using a 50 caliber rifle to shoot a squirrel. "The span needed is only about 5 feet and the load is for a bearing wall on a single story home." A beam is usually not considered riftsawn. ![]() And yes, I work at OSU, I just don't know who to ask.Ĭall the head of the OSU Forest Products Lab. Any help you can provide would be appreciated. I need a table of comparison for the building inspector. The span needed is only about 5 feet and the load is for a bearing wall on a single story home. The solid wood beams would be clear rift sawn lumber dried to 9% MC (no defects). For an equal size, it would not surprise me to see gluelam with spans 50% to 200% more. The real issue is, what is the grade of the solid oak and maple beams? With gluelam we can control the quality of the laminations and therefore the overall strength and stiffness within a narrow range. LVL 2900Fb-2.Are there any tables that compare the load bearing and span characteristics of fir glue laminated beams with solid hardwood beams? I am specifically interested in comparing solid Oregon white oak and bigleaf maple beams to commercially available fir glue laminated beams.įrom Professor Gene Wengert, forum technical advisor:Īre you in Oregon? If so, you have some excellent Forest Products Extension people there and also a wonderful Forest Products Lab at OSU. (Almost 2x what I need)Īgree with my assumption (in bold above)? So a double-ply LVL 3 1/2" x 9 1/2" x 11 ft beam can support 353 x 2 = 706 PLF. Using the Uniform floor load (PLF) tables from LP corp, I see that a single Total weight of supported floor: 55 x 154 = 8470 lbs.Īssuming beam is carrying 50% of this load (and the exterior wall carrying the other 50%) 8470/2 = 4235 lbs.īeam is (nearly) 11ft long. Using standard load estimates from LVL span tables: 40 psf live, 15 psf dead = 55 lb/sqft. Proper blocking will be done in the cellar belowĪrea of floor above the beam: 14' x 11' = 154 sqft.Due to orientation of floor above, only the left area of the floor will be supported by the beam (see sketch no.Interior wall, not carrying the roof load.of the LVL beams) and he wouldn't exactly give me an answer but he did say the key is determining the PLF (pounds per lineal foot) that the beam will carry. I talked to tech support at LPcorp (a mfg. I have the opinions from a couple contractors but I want to verify the size of the beam needed. ![]() ![]() Removing a load bearing wall and replacing with an LVL beam. ![]()
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