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. 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. Available in lengths up to 13.2m and in a range of thicknesses including 35mm, 45mm and 63mm with depths from 90mm to 400mm. So, let’s break it down step by step: Measure the Depth: Determine the depth of your LVL. e-beam LVL has many advantages over traditional building products, including its uniformity of engineering properties. To calculate the span of your LVL beam, multiply the depth of the beam (in inches) by this factor of 1.67. When we dug the hole, we hit ledge at 6 feet down. Here’s a handy rule of thumb: for every inch in depth, an LVL beam can span approximately 1.67 feet. Continuous Span Beams are beams supported at three or more points along their length. Single Span Beams are beams supported at two points only. ![]() 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. Span For the purpose of using these tables, span may be interpreted as the clear distance between supports measured along the beam. 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. Said that if I put in a center post, I could stay with the 8", but I don't want that. 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". I'm getting my materials from Hancock Lumber in Conway, NH.
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