how much weight can a 8x8 post hold

Is the load centric? Stop agonizing over it and add a mid-span post. What method are you using to connect the beams where they meet at each corner? /* myimages[5]="../../../images/top-banner/cookie-mizer.jpg" Framers generally nail together several pieces of dimensional lumber to create such . WAIT! For example, 4 x 6 lumber is not on the list, but you can simply choose 2 x 6 and double the value. 0.44 pounds is the weight of a one foot section of 22 lumber made from Sitka spruce. Is the post framed into a wall? By "unsupported" I meant that the logs will have no lateral bracing to minimize flexing under load; that is my understanding of what an "unsupported column" is.. but, I could be confused, and more than likely a term like "unbraced" or "un-wtf" would be better. so you have 1 of the posts sort of free floating presuably because the extra 1' of span was too much? Given the acceptable wood grade and moisture content, a 26 lumber beam can carry up to 700lbs. ft)= beam spacing x post spacing. Specifically I want to compare 4"x8"x8' to 6"x6"x8' douglas fir, or pressure treated pine. So a 6x6 post that is really 5.5x5.5 is equivalent to a circular post with a diameter of 6.6". You are looking at a pretty massive beam to carry any 20' span. I am getting ready to have a pine sawed into an 8x8 by 20 or 25 feet long. These commissions go towards things like hosting fees and creation of new articles. It then determines the total load from each tributary area based on the design load of your deck. For a better experience, please enable JavaScript in your browser before proceeding. for framing a wall) is usually one of the following softwoods (also called whitewoods): You can usually find the species of wood by looking on the tag stapled to one of the ends. I'm guessing that you'll have close to 600# in the 12'x12' dock with the gangplank resting on it, not including the weight of the hardware and drums. imagelinks[5]="https://woodmizer.com/Store/Shop/Sawmill-Options/CookieMizer-Clamping-Jig?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=cookiemizer&utm_term=2021-03-09&utm_content=800x160" I don't like going beyond 3' with a regular old post hole digger, as you have to dig a trench so you can open the handles to bite, etc; major PITA! We have received your request and will respond promptly. If a couple of lags and screws make you feel better, GO FOR IT. That section discusses calc'ing the necessary post diameter with a given load. 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. How Much Weight Can A 24 Hold Flat/Horizontally? I agree with "Trussdoc", bow is drying and actual loading is much less that design. An early on review. Loads must be concentrically distributed evenly over the top of the column shaft. This allows the even distribution of weight through the legs. You need to place the stud vertically to achieve this particular weight resistance limit. In both theory and practice, most decks built with traditional wood framing are designed to carry loads of about 50 pounds per square foot (PSF). All load capacities are based on axial loads with no moments. Most building lumber sold at home stores is kiln dried to some extent. How have you determined the 30,000 lb load? For this job, I am sure that 6x6 posts would be very adequate, but for down the road I want to know what 8" and 10" logs will carry. AITC Column Tables provide a calculated load that can be supported based on column size, length, and material properties see. //specify corresponding links below The maximum span for roof rafters is 23' 9". Let's break it down, using the large 6-8 person hot tub in my chart above as an example. 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. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. The same calculation can be used to figure the weight for pier (b), however instead of using 3 feet for the beam span you must use 6 feet to adjust for half the span in both directions. Sponsored Links. Step 6 : Multiply the weight of the one foot section by the length of the board. Which could possibly be a code issue as you would need a current deflection of L/900 to end up above L/360. Z-section steel is usually used in large steel structure plants. var myimages2=new Array() Below are some typical moisture contents of lumber. Treated wood has chemicals (usually MCA or micronized copper azole) in it that will slightly increase the weight. The formulas and tables list nearly every span imaginable along with all the various design loads. Default is 50 psf which you can change. The farther apart the posts are spaced, both in building width and side wall post spacing, the more load on each post. I think 6x6 word work fine but not look as nice. or 453 kg. This means that our 4-ply 2 X 12 will be 4 X 1-1/2 inches wide or 6 inches. I am building a supplies loft that is 24' x 24'. Our Large Pontoon Floats (22 x 24 x . Hire an engineer. Tension loads are based on net section assuming hole size equal to bolt diameter plus 116". First, you must consider the amount of weight your deck can hold from the ground up. Login with username, password and session length. How do I like my Vermont Castings Dauntless? There are a couple of types of hurricane ties that will work for the rafters with all of the Simpsons being adequate, nailing them on is also fine, no need for screws, as long as you use the nails specified on the simpson web site, fill every hole, and don't leave any just bent over. Left side are different so watch what you are getting. 10 Reply Sgt_carbonero 2 yr. ago These are all approximate values so be sure to take it with a pinch of salt. Load due to the weight of a mass - m - is mg Newton's - where g = 9.81 m/s2. Helping You to Do It Yourself! This can vary by species but they can support a lot of weight. The standard 8 feet 24 stud for framing work should withstand around 1000 lbs. For maximum design load you should be safe using 400 psi, that's about 12,000 lbs. AyeMatey 12 yr. ago. document.write('') It will undoubtedly sag over time. Is there an online resource to lookup post load capacities? Effective post lengths, l e, are the actual wall height minus the thickness of (3) 2x plates (4 1/2"). This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Question per square foot. From contributor J: 12000 divided by 1/6 is 72,000 psi. However, that "footprint" is reduced by the mortises and housings that you cut into it. I was originally going to go with 8" posts but they are hard to come by. By clicking "I AGREE" below, you are giving your consent for us to set cookies. And there you go, a 12-foot Sitka spruce 22 weighs 5.28 pounds. Typically, a deck can hold a minimum of 50 pounds per square foot. So, a 100 sqft deck would be designed to support 5000 lbs. Good to see that math and physics worked back then; dang stuff may NEVER go out of style! Its also great to test firewood for proper seasoning. It may not display this or other websites correctly. Wetter wood will be heavier than drier wood. If you buy through them I earn a small commission. Next, you'll have to figure out the tributary areas of your deck to get the total load. It is overkill for your case, but I rather oversize than have it fail on you. However, that number assumes your deck is to code without the deck's weight taken into account. Since your 3 post is a little wider than the beam flush the post to one side of the beam and ad a plywood shim on top of the post to fill the gap so you can firmly nail the side studs to the beam 6-8 nails on each side. myimages[6]="../../../images/top-banner/EZ-junior.jpg" What Size Nail Gun For Fence Pickets - Choose The Right One. Sorry about that. 48. For this job, I am sure that 6x6 posts would be very adequate, but for down the road I want to know what 8" and 10" logs will carry. In a 2x6 wall it would be sitting on top of a 4x6 with a 2x6 running up each side from the plate to plate. Its not the best for heavy-duty load-bearing but it is durable and great for lightweight work. This is only an average, however. Stone Coverage Calculator for Rock Landscapes, Picture Hanging Calculator with Gallery Spacings, Boulder Wall Calculator for Retaining Walls, Log Weight Calculator for Any Wood Species, Post Hole Calculator for Concrete Embedded Posts, Standard Heights for Light Switches, Outlets & More. An older calculator that only computes required . How To Calculate How Much Weight Something Can Hold? Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. 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%. For right now, the "span" is 42'. Available only in #1 & Btr Boxed Heart. Just so we're on the same page here's what it looks like with the engineered trusses. Same goes for a concrete block wall. How to Install/Lay Shingles Exterior Walls Construction: The Start-to-Finish Guide Cut wood Paneling with a Utility Knife Lap Siding Install Plywood Over Plank Subfloor The Uses of and Challenges in Cutting Formica Joints Miter Scarf and Butt Biscuit Rabbet Clamping Box Joints Protect Corners Cutting Notches Dowel Joints DIY Covering Plastic Edging The capacity of a 12' tall 6x6 post varies greatly as described above. Dunno. = 9.8 kN Note! The most frequent and typical size is 8 x 8 x 16; nevertheless, it is dependent on the block's size and density. A six bye six hem-fir post is good to about 26,000 pounds compressive strength. Span for 8x8 Timber beam. document.write('') That is what has prompted me to create this blog along with other experienced team members to share the new thoughts, tips, and tricks on woodworking, gardening, and outdoor tools with you. Info for store-bought 8x8's, etc, would be nice, too. Help my basement may not be structurally sound. I confess I didn't actually look over the math to see how it was derived. ,