how much weight can a 8x8 post hold

Have You Read My All-Time Most Popular Post? Span for 8x8 Timber beam. A 6610-foot long treated post weighs about 153 pounds immediately after being pressure-treated, but it will only weigh around 87 pounds after it has had time to dry out. 0.44 pounds is the weight of a one foot section of 22 lumber made from Sitka spruce. A well-cured Cedar has a load resistance of 7,500 PSI and compressive strength of 4560 PSI. My first question based on your new description would be - are you sure about 36" deep footers? An older calculator that only computes required . The Fora platform includes forum software by XenForo, https://courses.cit.cornell.edu/arch264/calculators/example7.1/index.html, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Any professional carpenter will tell you the same thing. It may not display this or other websites correctly. These numbers were gathered from the internet.>> A piece of yellow pine in an inside dry location can hold 1200 pounds per square inch and a 4" x 4" is really 3 1/2" X 3 1/2" or 12.25 square inches times 1200 is 16150 pounds. The size of the post is determined by the load it has to carry. Change that front double two bye ten to read 16' before you show the thing to the town!! random_imglink() 6X6 equation: 5.5inX5.5inX500=15,125 Lb/contact (round down to 15,000) 2x2 =. Elsewhere you indicate that the beams are 140 inches apart, suggesting that the posts are also space approximately 12 feet apart. imagelinks[6]="http://www.ezboardwalk.com/" myimages[1]="../../../images/top-banner/ez50-banner.jpg" A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. per square foot. Standard treated wood has about 0.06 lbs/cubic foot chemical retention while wood treated for ground contact has about 0.15 lbs/cubic foot. Already a member? I'm in mid-Michigan and code is 42" deep. What method are you using to connect the beams where they meet at each corner? However, the post will typically buckle under much lower load than the axial compression. Certainly, 6x6s would work fine, but then I'd have to buy them; logs a free. sort of. if I ignore my labor. Assume strong axis buckling. What method are you using to connect the beams where they meet at each corner? KD-19 (Kiln Dried 19%) lumber will have an average moisture content somewhere around 15%. so, what you have listed looks plenty beefy. The load capacity of a 3-foot #2 grade 44 is 17,426 pounds, and a similar 66 is 20,834 pounds or 16% better. Snow load? Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a parts function at the center of their design considerations. To compensate for increases, you'll need to use 210 joists at 12" o.c. When you have all the data, take the lowest value and add some safety margin. The combined uplift loads applied to all the beams must not exceed the post allowable uplift load listed in the table. Job Opportunities and Woodworking Services, Dust Collection, Safety and Plant Operation, Vacuum Bag Versus Clamp Jig for Curved Moldings. 1 kip = 4448 Newtons (N) = 4.45 kilo Newtons (kN) = 453 kgf. Let's break it down, using the large 6-8 person hot tub in my chart above as an example. +91-22-61905600 to 699 (100 Lines) exports@citizenltd.com. if you want beefier you can just build it up and clad it. Sponsored Links. Words. Below are some typical moisture contents of lumber. Then you show a "2x10x12 double" as the outside beam. It's next to impossible to pay for large graded timbers in all but the highest end work. There is no need to guess at loads. After 35 yrs it is no longer "perfectly" level, but you have to work at it to notice. A well-glued wood joint can take roughly 3000-3500 PSI of load before they break. or 453 kg. Working harder than ever. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Other more stringent kiln-dried standards exist but KD-19 is the most common. Does anyone have a reference for the load that various wood columns (rounds) can carry? Alloy is the same as 1015 above, but with 0.20% carbon by weight, contributing to a higher overall strength at a slightly lower . Finally, a single deck beam has a . The choices on the list are kiln dried pine, green oak, pressure treated above ground, and pressure treated below ground. Deck post sizes - 40 psf Live, 10 psf Dead. The flat-faced 24 wood can withstand 20-30 pounds of weight without deforming. Using R1 = R2 the equation above can be simplified to R1 = R2 = (9810 N) / 2 = 4905 N = 4.9 kN Related Mobile Apps from The Engineering ToolBox Beam Supports App Higher values are safer. Timber frame outdoor kitchen. Custom built Cook's-style hydraulic bandmill. The width, 12', will be spanned w/ 2x10's, 16" O.C. Therefore the length of the joist 12 divided by 2 =6 , multiplied by the length of the beam 6 = 36. A 44 lumber with a length of 8 feet can resist weight from 6000-6500 lbs. From contributor J: As for unsupported, yes, if I have my nomenclature correct. Thanks. Shorter lengths can support more weight. This is denoted by a KD-19 tag. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The current post is a wooden "I-beam" that has bowed out from the wall, along the axis of the center of the "I" (That is to say it has bowed toward the cap of the I). Helping You to Do It Yourself! We use cookies on this site to enhance your user experience. Thank you for your well-informed responses. Kiln-Dried After Treatment Timber Columns - Twin Creeks Log Home Supply Kiln-Dried After Treatment Timber Columns. For example, the length is 20 inches and the width is 15 inches, the area is 300 square inches. Toolsmirror is a group of co-fighters led by Engr. //specify corresponding links below We do get snow but I can easily push it off thanks to windows on the back of my house if we get to much. 1. For hemlock/fir beams, this document from the school of architecture at the University of Maryland states that in compressive loads, parallel to the grain, a 6x6 post 10 feet in length, can support 4400 lbs. For posts typically you'd want 6x6 for heights reaching 10'. Modulus of Elasticity of Wood, Wood Engineering Design Data. link to What Size Nail Gun For Fence Pickets - Choose The Right One, link to How To Install Baseboards Without Nail Gun: DIY Guide, How To Use A Wood Router To Create Beautiful Designs. I think 6x6 word work fine but not look as nice. Attach 58 inch (1.6 cm) eyebolts to the caps with nuts and bolts. Please let us know here why this post is inappropriate. In general, thicker walls will be able to hold more weight than . My searching on the Net gives me all kinds of info, but nothing I can understand; too much engineering language. However, that "footprint" is reduced by the mortises and housings that you cut into it. In general, the strength of wood depends not only on the thickness but also on type, moisture content, and grain direction. 2x4 as a post will support about 1000 lbs, that varies a bit by species. I figured kips was kilo something. It's not area, as strength was given as proportional to r^3 for either circular or square (with different scaling constants) and w x h^2 for rectangular in a horizontal configuration. If it is a complex design, focus on the geometry of the structure. I also built my addition, about 25 yrs ago, slab on grade, no foundation wall. The side beam allowable download is 1,170 lb. / 203 KG) Polaris 800 PRO-RMK 163 (408 lbs. Actual shipping weights should be verified at the scales. Green lumber is not recommended for indoor applications. Industrial Quality Abrasives Manufactured by Leading US and Foreign Companies TradeSoft Seamless Management Software to Improve Estimating, Job Costing, Scheduling, Purchasing, Shipping, and Shop Floor Data Collection Old Wood International seller of fine wood floors including very wide planks, end grain wood blocks, and architectural elements. A 6x6 8' in height with no load duration factor and of Doug Fir #1 or better is good for about 28 kips. You would have a better safety factor . We hope you enjoy shopping at Elite Trimworks. Typically, a deck can hold a minimum of 50 pounds per square foot. They also can be especially effective when withdrawal loads of large magnitude are anticipated. Z-section steel is a common cold-formed thin-walled section steel, with a thickness of 1.6-3.0mm and a section height of 120-350mm. Assuming #2 grade, the Fc = 525 psi and E = 1.2. It is overkill for your case, but I rather oversize than have it fail on you. /* on Sawmills and Milling, Started by TGS I'm concerned that a 4x4" would not provide enough load-bearing capacity, but I have no engineering background. How Much Weight Can A 24 Hold Flat/Horizontally? For a general idea, we have rounded up these table types and their weight capacity. / 185 KG) Polaris 800 TITAN Adventure 155 (658 lbs. A piece of wood can carry so much weight per square inch of footprint. We who frequently attempt to create various wooden furniture or crafts as a DIY project, I hope the above knowledge will assist them in building safe and excellent items in the future. They are great little tools and arent too expensive. myimages[2]="../../../images/top-banner/BladesFreeShip.jpg" Once you know the unit loads, multiply by the tributary area to each column to determine the load on each column. By clicking "I AGREE" below, you are giving your consent for us to set cookies. 2003 - 2023 Elite Trimworks. In most cases you can go to 80 lb/sqft in isolated spots, but unless you know roughly what the soil bearing and reinforcing is for that slab you might be looking at cracking. So if you plan to glue joints that exert more than 3500 PSI, it will probably fail. JavaScript is disabled. In this example, 28 sf falls under the 36. Read page 29, section 44 (if I recall. The book looks "old", too. } To my astonishment, this one and a half decades of association with the said field has made me acutely interested in this sector. Thread Types Bolts, Pipes, Hoses and More, Wood Handbook, Wood as an Engineering Material, 85% of pressure treated lumber sold in the US is southern yellow pine, will probably have a higher moisture content (35%-75%), Drain Pipe Slope Calculator (According to International Plumbing Code), Lumber Weight Calculator for Any Wood Species, Plywood Weight Calculator for CDX, OSB & More, PVC Pipe Calculator (Outside and Inside Diameter), Sod Calculator Estimate Sod for Your Lawn, Wall R-Value Calculator for Wood Framed Walls, Douglas-fir-larch, which can either be Douglas-fir or western larch, Hem-fir, which can either be western hemlock, California red fir, grand fir, noble fir, Pacific silver fir, or white fir, Southern Yellow Pine (SYP), which can either be loblolly, longleaf, shortleaf, or slash pine, Spruce-pine-fir (SPF), which can either be subalpine fir, balsam fir, black spruce, Engelmann spruce, jack pine, lodgepole pine, red spruce, or white spruce, Average equilibrium for interior wood in US ~8%. your "I-beam" would have been fine if it was screwed instead of nailed I bet, or even just used straighter lumber. Dunno. That said, if the building department doesn't apply, you can simply calculate your beam based on a low grade of material to cover the worst case scenario. Capacities are per post/column and allow for a safety factor of 5. The capacity of a 12' tall 6x6 post varies greatly as described above. The formulas and tables list nearly every span imaginable along with all the various design loads. Just KIloPoundsS? An 8x8 (even with no load) would sag under its own weight at that distance. Load due to the weight of a mass - m - is mg Newton's - where g = 9.81 m/s2.