![]() Excerpt: The user is responsible for proper. A good collection of nearly all LVL sizing and span and load tables. I have passed this on to the homeowner to sort out the details. beams, and LVL bearing length requirements. Try to get in touch with Scott Levengood - he is a wood extension agent for OSU. 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. The Bearing Capacity for concrete is based on a conversion to allowable stress design for comparison to the column capacities in this guide. Any help you can provide would be appreciated. The capacity for Wood Bearing is based on the compression strength, perpendicular-to-grain, of the bearing plate and shall not be adjusted for load duration. Use ForteWEB to determine solutions for conditions beyond the scope of this table. For Canada switch to Canada Sizing Table Lookup. I need a table of comparison for the building inspector. Use the drop downs below to select your loading, house width, and material to calculate the appropriate size of TimberStrand or Parallam ridge beam. Girders are found in floor systems spanning. All other data is available on page 121 of the 2012 International Residential Code. These charts are for 30 pound per square foot snow load on the roof. Includes span tables for all load bearing locations and the number of jack studs. The span needed is only about 5 feet and the load is for a bearing wall on a single story home. Span charts and 2012 IRC building codes for girders and headers. Basic Techniques : Carpentry / Wall Removal 41. The solid wood beams would be clear rift sawn lumber dried to 9% MC (no defects). Glue - lam beams are made from layers of dimension lumber laminated together. 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. T40 series - 190 x 45 or 200 x 42 LVL For higher loading, steel sections can be used as strongback or internal beams refer to Tilling Timber Pty Ltd or a structural engineer For maximum efficiency, avoid cutting holes with a diameter greater than on third the depth of the strongback. 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. ![]()
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