4/16/2024 0 Comments 2.oe beam lvl span tables![]() If your build has a permit inspector, then the first thing to do is check with that office and verify that your plan change is allowable. If your porch is bigger or you have more snow in the area then a bigger beam or better quality wood will be required. Based on my assumptions and further assuming all my calculations are correct, it looks like a 4x10 will be adequate for that span. Your architect designed for the specific values for your area and those should be noted within the design documents. For a porch 8' deep and a beam span of 16', that equates to a design load for the beam of 1920 lbs. Assuming 10 psf and 20 psf respectively, that is 30 lbs per square foot. Multiply that by the design load, which is the sum of the dead load and live or snow load. Multiply half the porch depth by the beam span to get the area. The house is holding up half of the porch roof, and the beam the other half. The load that the beam must carry is determined by the depth of your porch and the design load for your area. Using that value and a width of 6" and a depth of 10", the max load is 3140 lbs.įor reference, a 4x8 beam of EWP #2 spanning 90" like in the original design has a max load of 2840 lbs. A 6x10 beam consisting of three 2x10 nailed together has Fb of 727.35 psi. Using a built-up beam of three or more stringers nailed together allows a 15% increase in the bending fiberstress. ![]() Using that and a depth of 12" the maximum load for the beam is 2610 lbs. Going through the same process you will find that the maximum load for the 4x10 is 1970 lbs.įor a 4x12 beam the shape factor is 1.1, resulting in a Fb of 632.5 psi. Update that value in the calculator, and set the beam depth to 10". You will soon arrive at the max load for the beam of 1375 lbs.įor a 4x10 beam of #2 EWP apply the size factor of 1.2 to arrive at a Fb of 690 psi. ![]() Add 100 lbs to the load and click Show Result. LVL beam sizes:- LVL beam sizes may vary according to manufacturer but lvl standard thickness are 1-3/4 inches to 3-1/2 inches.An LVL beam length are generally available in 24, 28, 32, 36, 40 and 44 feet with special order upto 60 Feet. Now input a load of 1000 lbs in the top field and click Show Result. Input these values and keep them constant: Span 186", width 4", depth 8", fiberstress in bending 747.5 psi, modulus of elasticity 1,1 million psi, and allowable shear 135 psi. Now go to the beam calculator and plug in the relevant numbers. For a 4x8 beam (assuming rough cut so using full 4" x 8") the F b size factor is 1.3. Table 4A in the NDS Supplement has adjustment factors that need to be considered. These are base numbers that we may need to modify depending on the manner of beam chosen. For EWP #2 those values are 575 psi, 1.1 million psi, and 135 psi. The values we need to know are for Fiber stress in bending (F b), modulus of elasticity (E) and allowable horizontal shear (F v). Table 4A gives the reference design values for Eastern White Pine. Brochure - This 2-page brochure contains primary information about West Fraser's LVL product line. The engineering properties for graded lumber species are codified by the American Wood Council. US Users Guide - This guide contains load tables, design properties, connection details, bearing details and allowable holes for West Fraser 2.0e, 1.9e and 1.8e LVL.
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