I didn't realize that the lumber yard could provide expert consultation in this way, so that suggestion was very helpful. I'd love to lower the foundation, but at what expense? Going lower on the foundation would have meant double the drilling since now I'm exposing more ledge area and it's more solid. That got me an extra foot in the basement, to a 7' ceiling if I used 2x8's for joists. I spent a week drilling holes (130) in the ledge and pouring in Dexpan to break it up to the point where a small hammer on a skid steer could bust it out. Lateral support of beam compression edges is required at intervals of. Design a beam width based on the fact that the typical width of an LVL beam is 1-3/4 inches to 3-1/2 inches. Refer to West Frasers sizing software for other loads or span configurations. To figure out or estimate of LVL beam size and their depth. Blasting is not an option due to cost, and I doubt that any demolition person would do that when it's right next to another structure. To calculate the size of the LVL beam simply divide the span in inches by 20 which gives the depth of the beam and the width of the LVL beam 1/3 or 1/4 of its depth. When we dug the hole, we hit ledge at 6 feet down. I may keep the 8" LVLs and use them to stiffen the floor in the older section.Īs for "refusing" to drop the foundation, or raising the floor: It would be better to say I'm having to make choices. This will still be much better than the house I'm adding on to where the floors are carried by 2x8's sitting on horizontal 4x4's resting on piers every 6 to 10 feet. He said that if I used a triple 12", then the floor would be perfectly stiff, but the double would be fine. Our manufacturing process creates uniform and predictable products, all with a limited lifetime warranty. From window openings to garage door headers, Microllam LVL is a versatile solution that supports heavy loads without worry. Said that if I put in a center post, I could stay with the 8", but I don't want that. A versatile performer in a wide range of structural applications. Click the 'Calculate' button to obtain the recommended LVL size. Input the uniform load on the beam in pounds per foot. To calculate maximum spans of additional species of lumber, use the Span Calculator or the Span Tables for Joists and Rafters on the American Wood Council website. How to Use: Enter the span of the beam in feet. This new edition of The Span Book includes added tables for deck joists and beams, more lintel options, and recalculates all spans using revised shear properties. Contact your local building code officials to determine the building code for your area. I dropped in on them this morning and after looking it over and doing some calculations, they said I needed to swap out my 8" LVLs for 12". Weigh all of the elements when designing wood structures. LVL 2900Fb-2.I'm getting my materials from Hancock Lumber in Conway, NH. For the purpose of using these tables, span may be interpreted as the clear distance between supports measured along the beam. (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.Use ForteWEB to determine solutions for conditions beyond the scope of. For Canada switch to Canada Sizing Table Lookup. Due to orientation of floor above, only the left area of the floor will be supported by the beam (see sketch no. Use the drop downs to select your floor load, framing length, and material to calculate the appropriate size of TimberStrand or Parallam beam. Interior wall, not carrying the roof load.Lightweight: HJ240 45 and HJ300 45 hyJOIST are approximately 60 - 70 the weight of equivalent spanning SG8 section. Zone where horizontal holes are permitted for passage of wires, conduit, etc. Provides greater design flexibility for cost-effective floor layouts. Allowing specifiers to optimize performance of a floor design in depth, span, load and cost. Span is center-to-center of supports and is. Available in 10 section sizes and 3 different flange widths. 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. Use the Simple-Span Floor Joists table where the floor joists frame into the side of or end on top of the beam. I talked to tech support at LPcorp (a mfg. The size of the ridge beam depends on span of the beam (clear rough span) along with supports, and the amount of roof load supported by the beam. 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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