how much weight can a 8x8 post hold

I confess I didn't actually look over the math to see how it was derived. Tension loads have been increased for wind or seismic loading with no further increase allowed; reduce where other loads govern. Its also great to test firewood for proper seasoning. 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. / 203 KG) Polaris 800 PRO-RMK 163 (408 lbs. 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. How Much Weight Can A 24 Hold Flat/Horizontally? The first thing you should do is check the grade stamp. To calculate the load, you should use 40lbs per square foot for live loads (these are variable loads that are dynamic such as the weight of people and furniture) and 15 lbs per square foot for dead loads (this is the weight of the materials used for the construction of the deck) for a total load weight of 55 lbs per square foot. However, an 8-foot 44 supports 6468-pounds and 2339-pounds at 14-feet, while a 66 is 18032 and 10550-pounds respectively - or 64% and 78% more load capacity. Custom built Cook's-style hydraulic bandmill. Capacities are per post/column and allow for a safety factor of 5. This advertisement will close in seconds. But again, this is speaking to what I would consider mid-level work as opposed to high end. 12000 divided by 1/6 is 72,000 psi. It then determines the total load from each tributary area based on the design load of your deck. How Much Weight Can a 66 Post Support. ry=1 Multiply the loading per square foot by the area in square feet of the surface which the beams will be supporting. One thing to remember, wood type and moisture content will greatly affect these weight capacities. Updated: 00/04/25 To my astonishment, this one and a half decades of association with the said field has made me acutely interested in this sector. This should be a pretty simple but I am having trouble finding the right information. 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 (ry==0) 10 Reply Sgt_carbonero 2 yr. ago Description 8 x 8 timbers are sturdy and heavy-duty. //specify corresponding links below When making a wooden item, such as a coffee table, bookshelf, or chair, you must have asked yourself this question: how much weight can wood hold? Promoting, selling, recruiting, coursework and thesis posting is forbidden. So if you plan to glue joints that exert more than 3500 PSI, it will probably fail. 30". I have 9' height on parts of my deck being supported by 6x6x16' posts buried 4' in the ground with proper footings. So you want steel that can handle at least 72,000 psi. I'll have some serious steel well embedded in the concrete and well anchored to the logs. Ive put in plenty of glue lamb beams and never seen a post wider than the beam. This is denoted by a KD-19 tag. Does anyone have a reference for the load that various wood columns (rounds) can carry? That said, my house has a "by code" foundation wall, and the new house will go down 48" because it is going to be about 90' long. These commissions go towards things like hosting fees and creation of new articles. If you buy through them I earn a small commission. The top of a beam has 2mm (1/12 in) x 2 inch of steel, which is 1/6 square inch. Registration on or use of this site constitutes acceptance of our Privacy Policy. If I understand you correctly, you have four posts in the garage. So I'm wondering if 6x6 would hold up the roof since they are only $30 each and the simpson strong ties are available. To fix the weak link, add more strength or change the material. Z-section steel is usually used in large steel structure plants. 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). One year of on demand One on One coaching and mentorship directly with Greg Dickerson via Zoom, phone, email, text Monday-Friday between the hours of 8am-5pm EST. so, what you have listed looks plenty beefy. Max lifting capacity for an average human adult, Allowable uniform loads - W beams vs. LVL, Simplification of load on beam for Max M and D, Help with wheels, stopping forces and possibly Simpack, Calculating the force that a permanent magnet exerts on a particle, Heat loss from the temperature difference. The weight of the lumber is automatically returned in pounds. Are you planning to apply your own safety factor or are you really looking for the maximum allowable load capacity? per square foot. You're talking about a huge loss of this thing buckles. Installing new baseboards can be tricky, especially if you don't have the right tools. Yes, the 36" footer should raise flags, and code here is also 42" (to the top of the footer). 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%. 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. Thanks for the replies. It will have a flat roof in it to so there will be 9 2x4's running from beam to beam. It does not have the strength of solid wood but it can sustain a small to medium load at a much cheaper cost. imagelinks[1]="http://www.ezboardwalk.com/" I hope that clears up the confusion. I am using 9 - 3" x 6" posts, 3 beams of 2" x 8" (double) beams, 2" x 6" floor joices (16 " inches apart), and the floor is 3/4" plywood. Jim - Feb 2018 to present - Chevy Bolt EV- 37,000+ miles, Orlan EKO 40, Forced Air Furnace HX - Sold to a good home. What are your spans? The wall is studded with 2x4 is placing a 4X8 under it "the wrong way" going to cause problems with the weight not being distributed properly on the top of the post? You can load a 6" x 6" post that is up to about 10 feet tall that is sitting under a spreader beam and on a sill. In this example, 28 sf falls under the 36. The actual dock will weight by itself 10.5 pounds per square foot. How Much Weight Can A 24 Hold? The side beam allowable download is 1,170 lb. Toolsmirror.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. When you have all the data, take the lowest value and add some safety margin. Loads must be concentrically distributed evenly over the top of the column shaft. vertically. //specify corresponding links below Dunno. As a result, a 66 will support a greater tributary surface. Post heights are based on standard precut stud heights and associated top plate heights. The width, 12', will be spanned w/ 2x10's, 16" O.C. Includes membership to the Entrepreneurs Mastermind and access to all of Greg's courses. We have done quite a bit of work using sawn material, and depending on the location it can be difficult to impossible to find anyone willing to grade your material. 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" For example, 4 x 6 lumber is not on the list, but you can simply choose 2 x 6 and double the value. /* The post is bowing slightly. Info for store-bought 8x8's, etc, would be nice, too. Problem is, I am reading it backwards, as the more I scroll up the more good info I find. 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. Step 6 : Multiply the weight of the one foot section by the length of the board. Ron. Better use epoxies and polyurethane adhesive instead for a stronger bond. One thing to keep in mind, as the length of the stud increases, the weight capacity will decrease accordingly. When it comes to how much weight a wall can hold, it really depends on the type and thickness of the wall. They are great little tools and arent too expensive. However, the post will typically buckle under much lower load than the axial compression. Stop agonizing over it and add a mid-span post. In any case, 30 kips is a substantial load to be supported by a 6x6 wood post. spacingmore weight means the joists need to be closer together. myimages[3]="../../../images/top-banner/wm-40-years.jpg" Theoretically, increasing the span from 11 feet to 14 feet should increase the beam deflection by a factor of 2.5 for similar loading (not exactly the case here, as you're re-loading the beam more to mid-span). myimages2[1]="../../../images/top-banner/behindtheforum.jpg" 3000/1500 is 2. 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. You are looking at a pretty massive beam to carry any 20' span. The limiting factor (reason to up-size) will likely be aesthetics and/or the number or type of joints needed. You are using an out of date browser. Let's break it down, using the large 6-8 person hot tub in my chart above as an example. spacing to meet the 50 psf design load. 49.02. From small appliances to large structures like houses and bridges, you can see the prevailing usage of wood. Can anyone tell me how much load a 6"x 6" pressure treated post 8'in length is rated to hold? Span for 8x8 Timber beam. The ultimate load is the defined by area of the roof carried by each post. I wouldn't be concerned about a 4x4. 3X3 box =54,000 Lb. Is any of this a roof load? Whether you're a professional or a DIY enthusiast, it's important to choose the right size nail gun for your fence pickets. That makes approximate sense, as the ratio of the area of a square, with side 2r, to that of a circle w/ radius = r, is 4 to 3.14. How far can you span a 66 post? Those H2.5a come in right side. Share Improve this answer Follow answered Nov 15, 2017 at 5:19 LRU 51 1 1 7 The cost difference between the 6x6 and the 8x8 are minimal. The thing as designed is fine and is not going anywhere. Because of this, a block used to support a column can bear less weight than the same block used to support a slab. We have not been in the house long. 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! http://books.google.com/books?id=hFk_result&ct=result&resnum=1#v=onepage&q=round. Maybe I am just lucky, but dry dirt does not heave. on General Board, Started by Jeff From contributor A: A 6 x 8 will span 12' for flooring. What are the Max Watts on a 15/20 Amp Circuit? so you have 1 of the posts sort of free floating presuably because the extra 1' of span was too much? 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. The vertical load capacity of a "plain" wooden post will depend on its height. or 453 kg. Fastening it has yet to be dealt with consideration of your availability of hardware and . The truss design estimates 30,000# on this post. So, I think I'll just go down 3' on the new "deck", though if I hire my neighbor's Bobcat w/ a hole driller, then 4' won't hurt so much. I am adding a roof along the side of my house so we can park there, out of the weather. It's next to impossible to pay for large graded timbers in all but the highest end work. 6X6 equation: 5.5inX5.5inX500=15,125 Lb/contact (round down to 15,000) 2x2 =. Use 4 sistered pairs as your corner legs. Thank you for the important information regarding buckling, and the importance of securing the posts in the centers. } Other more stringent kiln-dried standards exist but KD-19 is the most common. Ps. Perhaps we're mixing up the words. I'm still drawing up my gable roof over deck plans to submit to the building department. Reinforced concrete integrated T-beam, girder, and 1-way slab calculator: New and improved! Is the 30 kip load Dead and Live load? A 44 lumber with a length of 8 feet can resist weight from 6000-6500 lbs. +91-22-61905600 to 699 (100 Lines) exports@citizenltd.com. PrivacyPolicy, T = Bearing Length (post thickness) Related Lumber Wood Engineering Data: Structural Wood Lumber Engineering Properties 5" and Larger For a better experience, please enable JavaScript in your browser before proceeding. If you're in Alaska (I'm assuming, Fairbanks?) Typically, a deck can hold a minimum of 50 pounds per square foot. Working harder than ever. Then you show a "2x10x12 double" as the outside beam. Forum Responses Normally all winter we have 5-6" on the ground at all times. Eventually, you will find the appropriate weight capacity of your structure. What's the load capacity of 6 aluminium posts? The allowable (ASD) loads are based on the 2015 National Design Specification for Wood Construction (NDS). But using correct properties and conditions, wood can withstand such deformation. stick a couple of 2x4s beside it to hold the beam in place if you want. Is the post framed into a wall? The capacity of a 12' tall 6x6 post varies greatly as described above. Green lumber is not recommended for indoor applications. Disco: Thanks. 1 kip = 4448 Newtons (N) = 4.45 kilo Newtons (kN) = 453 kgf. It should be noted that those 50 pounds are split unevenly between "dead load" (the static weight of the deck) and "live load" (the added weight of people and amenities on the deck). Read page 29, section 44 (if I recall. Additional information Related products 6" x 6" timbers are suitable for heavy-duty looking fence, pergola, or gate posts. JavaScript is disabled. Calculate the weight of the snow on your roof. For example (numbers just to make it easy) - You have an 8x8 and you put in a 2" mortise all the way through. As we can see from the table, Hickory has the most pounds per square inch (PSI) resistance to the load. I want to have a 10' clear height for a room, so I'll be walking around some naked (unsupported) posts. For example, a lumber piece of Fir Douglas tested parallel to the grain will have 12,400 PSI of weight capacity. How much weight can my deck support? Most any time we have tried to work large structural members into a project where any building department is involved, those elements are quickly phased out of the project due to cost. I just want to know how many POUNDS (not "kips", whatever they are) a 10' peeled aspen log will carry when stood up, unsupported, and is 10' long, etc. Calculate the weight the beam must support. You need to place the stud vertically to achieve this particular weight resistance limit. 18', 20', 22', 24'. 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. Seems you've got a pretty good idea what you're up to. If your have to use a 4x8 you would want so 8 would be fully under the beam and the 4 would flush up with the sides of the beam so you can run a stud from the bottom plate along the post and along side of the beam, creating a pocket. We use cookies on this site to enhance your user experience. Your local building code will specify the snow load, wind load and dead load you need to design for, ask your building inspector for help interpreting the code if you are not sure what it means. Over 200+ free JavaScripts here! var ry=Math.floor(Math.random()*myimages2.length) A six bye six hem-fir post is good to about 26,000 pounds compressive strength. This means that our 4-ply 2 X 12 will be 4 X 1-1/2 inches wide or 6 inches. To calculate other wood weights and volumes, check out: Just a heads up, this page contains affiliate links. I hope you'll enjoy all those and find them useful in your daily life. Using a 58 inch (1.6 cm) drill bit in your power drill, drill a hole into the center of 4 of the caps. 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. S Forums Engineering General Engineering The capacity of a 12' tall 6x6 post varies greatly as described above. IF I am looking at your drawing correctly, you have a "2x10x16 single" as the ledger against the house. 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. After it comes through the planer it will be 1-1/2" X 11-1/4" (so yes, a 2 X 12 does not measure 2" X 12"). For posts typically you'd want 6x6 for heights reaching 10'. how much weight can a 8x8 post hold Home; About; Location; FAQ The ones I did find they wanted $160 each and then I couldn't find any Simpson strong ties to suit my needs connecting the beam to the top of the 8x8. My first question based on your new description would be - are you sure about 36" deep footers? So the net weight an 8ft x16ft dock will support is 3,120 - 1344 = 1776 lbs. In general, thicker walls will be able to hold more weight than . 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. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Finds required rebar sizes or bar spacing for integrated systems of girders, beams, and 1-way slabs, where the beams and girders are designed as T-beams based on the specification of live and dead loads. An 8x8 (even with no load) would sag under its own weight at that distance. Overall, there are several factors to consider when thinking about how much weight a deck holds. A well-built MDF shelf can hold between 50-80 pounds of weight. Below are some typical moisture contents of lumber. For maximum design load you should be safe using 400 psi, that's about 12,000 lbs. But you need to add up the loads based on values that go with your allowable stress. Assuming a 6ft length of 4x4 that actually measures 3.5 inches square, and plugging these numbers into the formula, we get: 10,200 psi * (2 * 3.5in * 3.5in^2) / (3 * 72in) = 4049.306 pounds This appears to be the point at which your beam will deform. Determine the Pad's Area. You are using an out of date browser. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I may just have to up and buy the thing. j. We have received your request and will respond promptly. I think 6x6 word work fine but not look as nice. Measure the length and width of the top surface of the concrete pad in inches and then multiply them to get the pad's area in square inches. Still, frankly I don't know what the builder was thinking (or drinking, as it seems the case may have been). Now since we got the structural issues aside but if anyone thinks of anything else please do let me know What do you guys think of a black or maroon metal roof? Toolsmirror is a group of co-fighters led by Engr. Posts are held to concrete footings with metal brackets, they are further supported 3' up by the floor framing and then again by the roof structure. var ry=Math.floor(Math.random()*myimages.length) Thank you for subscribing to the newsletter! } Are you planning on building a fence? It may not display this or other websites correctly. Answer (1 of 4): Typically we like to limit the weight to about 40 lb/sqft on an unknown 4 slab. 48. If a couple of lags and screws make you feel better, GO FOR IT. When a deck is built to code, the code only requires that the deck can hold a minimum of 50 pounds per square foot. The above listed weights are approximates and are intended as a general guideline only. After rereading your post I see you are going to have a gable roof which will give it sheer strength. Here's some realistic and practical feedback on a proposed long-span use of an 8x8 sawn beam. I am not sure I understand the arrangement, a photo would help immensely, or a sketch. The formulas and tables list nearly every span imaginable along with all the various design loads. Assuming #2 grade, the Fc = 525 psi and E = 1.2. So the posts themselves will look beefy. 900 pounds. if (ry==0) 9.5. 3 Trusses made with 6x6 overall size is 12x12 4.5 pitch, 2x6 T&G decking , 8x8 columns, 8x8 carrying beam to span 12' center to center at columns read more. Help my basement may not be structurally sound. Wall height is nominal height plus 1 1/8". We'll say the tributary load of your interior deck footing is 3000 pounds. 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. 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. Question 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. or 453 kg. Loads must be concentrically distributed evenly over the top of the column shaft. What species of wood? The material you use to support vertically are your posts. ry=1 How have you determined the 30,000 lb load? Safe loads for Wood Columns - No.1 grade Douglas fir-larch: a kip is a non-SI unit of force - it equals 1,000 pounds-force. 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. If I read what I googled correctly the diameter of a round post needs to be 6/5 or 1.2 times larger than the side of an equivalent square post. //-->,