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. Calculate: Click the 'Calculate' button to run the calculation.
Input Data: Enter these values into the calculator fields. 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. How to Use the LVL Beam Span Calculator: Gather Information: Know the LVL beams width, depth, and the load it needs to support. 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. 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. * Lengths made to order, lead times apply.The engineering properties for graded lumber species are codified by the American Wood Council. For quality assurance the Futurebuild range is manufactured with independent audit processes and product certification.Īll Futurebuild LVL products are manufactured using a type ‘A’ bond with less than 0.5mg/L formaldehyde emissions from the final product (equivalent to E0). Characteristic Properties are determined in accordance with AS/NZS 4063.2:2010 and so comply with the provisions of the New Zealand Building Code through clause 2.3 for engineering design in accordance with NZS3603:1993 Timber Structures Standard.įuturebuild LVL is committed to manufacturing innovative engineered building products. Solid Futurebuild LVL products are manufactured in accordance with AS/NZS 4357, Structural Laminated Veneer Lumber. computeIT ®software suite available for specific engineering design.Supported by technical support and software from Futurebuild LVL.Residential Span Tables available - refer brochures below.Available Forest Stewardship Council® (FSC®) certified (FSC® C007103) upon request.Manufactured from sustainably-grown NZ plantation pine.Stringent quality control – EWPAA certified.Each piece is branded for ease of identification.Untreated and H3.1 LOSP treated product available made to order subject to minimum volumes and lead times, Contact us for further information.Readily available and stocked H1.2 treated using a glue line and surface spray treatment to the requirements of NZS 3640.Veneers are bonded together using type 'A' (marine) bond, known for long-term durability in structural applications.Straight, true, strong, lightweight and dimensionally stable.hySPAN is not intended to support brickwork or other heavy masonry products. hySPAN is suitable for all structural applications in residential, commercial, industrial and rural buildings subject to design verification. HySPAN ® laminated veneer lumber (LVL) is easy to work with using traditional building tools and is clearly branded for easy identification and your guarantee of quality.