how much weight can a 8x8 post hold

An early on review. In any case, 30 kips is a substantial load to be supported by a 6x6 wood post. 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. //specify random images below. Already a member? The allowable (ASD) loads are based on the 2015 National Design Specification for Wood Construction (NDS). 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. To compensate for increases, you'll need to use 210 joists at 12" o.c. Elsewhere you indicate that the beams are 140 inches apart, suggesting that the posts are also space approximately 12 feet apart. Considerably Higher Load Capacity Than Traditional Posts. now Let's find the tributary areas of a deck. var imagelinks2=new Array() If you use the right ones in the wrong place, it sure confuses things. You can use your mousewheel to scroll though all of the pictures. 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. Insert 1 eyebolt into each hole that you drilled. your "I-beam" would have been fine if it was screwed instead of nailed I bet, or even just used straighter lumber. 3.5inX3.5inX500psi=6125 pounds per contact zone (round down to 6000) So: 2X2 box crib = 24,000 Lb. Capacities are per post/column and allow for a safety factor of 5. It may not display this or other websites correctly. 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. 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. In general, thicker walls will be able to hold more weight than . I hope that clears up the confusion. L/d ratio is 13 Allowing for buckling, allowable compressive stress is roughly 475 psi, Area is 30 sq in, so the allowable force in the post is 14,300 lb. One thing to keep in mind, as the length of the stud increases, the weight capacity will decrease accordingly. var myimages=new Array() Other more stringent kiln-dried standards exist but KD-19 is the most common. vertically. 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. I hope you'll enjoy all those and find them useful in your daily life. 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. In general, the strength of wood depends not only on the thickness but also on type, moisture content, and grain direction. Perhaps we're mixing up the words. 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. 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. 3X3 box =54,000 Lb. If you are considering wooden structure, geometry also plays a big role in this along with the aforementioned factors. Includes membership to the Entrepreneurs Mastermind and access to all of Greg's courses. An 8x8 (even with no load) would sag under its own weight at that distance. For my "roof", for lack of a better term, which will be 42' long by 12' wide, I will use the aspen logs as columns to support a 42' beam (4 logs under a 42' beam). Remarkably, some of it still stands to this date! 199. You're talking about a huge loss of this thing buckles. Is the post framed into a wall? MDF is a lightweight composite material in the world of carpentry. Thank you for subscribing to the newsletter! Which could possibly be a code issue as you would need a current deflection of L/900 to end up above L/360. JavaScript is disabled. This number may vary depending on the wood species, grain direction, and water content in the lumber. Using a 58 inch (1.6 cm) drill bit in your power drill, drill a hole into the center of 4 of the caps. Stee: It sometimes takes me a while, but I can usually get it all explained clearly. Thanks. You are using an out of date browser. 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. Surely there are other factors involved besides purely area, too. Question The standard 8 feet 24 stud for framing work should withstand around 1000 lbs. Maximum Deck Post Height (ft) Wood Species. Load due to the weight of a mass - m - is mg Newton's - where g = 9.81 m/s2. I also built my addition, about 25 yrs ago, slab on grade, no foundation wall. My searching on the Net gives me all kinds of info, but nothing I can understand; too much engineering language. So the net weight an 8ft x16ft dock will support is 3,120 - 1344 = 1776 lbs. What method are you using to connect the beams where they meet at each corner? Stoves: BIS Ultima, Napoleon 1100CP, Woodstock Fireview. 6x6 is perfectly fine. For interior work you'd usually use steel floor jacks designed to support "buildings". By clicking "I AGREE" below, you are giving your consent for us to set cookies. Assuming #2 grade, the. Next, you'll have to figure out the tributary areas of your deck to get the total load. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. The most frequent and typical size is 8 x 8 x 16; nevertheless, it is dependent on the block's size and density. (Straight 6x6's are difficult to find), We have reinforced the post. That book you referenced was very informative, btw. So a 6x6 post that is really 5.5x5.5 is equivalent to a circular post with a diameter of 6.6". Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Please let us know here why this post is inappropriate. on Sawmills and Milling, Started by TGS 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. */ Next time, I'll send in a sketch. I am getting ready to have a pine sawed into an 8x8 by 20 or 25 feet long. For posts typically you'd want 6x6 for heights reaching 10'. Most P/T wood is Southern Pine. We hope you enjoy shopping at Elite Trimworks. A well-built MDF shelf can hold between 50-80 pounds of weight. Copyright 1998-2023 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. 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. Thanks for your help. My first question based on your new description would be - are you sure about 36" deep footers? function random_imglink(){ Is the 30 kip load Dead and Live load? ry=1 The side beam allowable download is 1,170 lb. So I'm wondering if 6x6 would hold up the roof since they are only $30 each and the simpson strong ties are available. You need to place the stud vertically to achieve this particular weight resistance limit. First, you must consider the amount of weight your deck can hold from the ground up. I am building a supplies loft that is 24' x 24'. imagelinks[4]="http://www.ezboardwalk.com/" How Much Weight Can a 66 Post Support. Yes, it was for doug fir. Loads must be concentrically distributed evenly over the top of the column shaft. spacingmore weight means the joists need to be closer together. A 3x15x24 isnt that big. john. Engineered for Maximum Stability and Durability. If you buy through them I earn a small commission. Required depth is more a function of your frost line than it is how much support you get from going deep. Modulus of Elasticity of Wood, Wood Engineering Design Data. The truss design estimates 30,000# on this post. For headers, the maximum span is 11' 2". To fix the weak link, add more strength or change the material. Ps. var myimages2=new Array() Thanks for the input; suggestions/questions are always welcome. One thing to keep in mind, as the length of the stud increases, the weight capacity will decrease accordingly. If you want to test for moisture content before you buy, pick up a moisture meter. 400200. Green lumber is not recommended for indoor applications. However, I cheated 35 yrs ago and put my deck posts down only 2', and so far, so good. What's the load capacity of 6 aluminium posts? Glued and screwed) That is stronger than a 4x4. 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). Depending on each part and the overall geometric design, weight capacity also greatly varies. 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. Click for a larger images. If I understand you correctly, you have four posts in the garage. Close this window and log in. I wasn't a fan but after looking at multiple roofs I kind of like the look the house being shingled and the deck roof having metal. on General Board, Started by Jeff 10 Reply Sgt_carbonero 2 yr. ago To my astonishment, this one and a half decades of association with the said field has made me acutely interested in this sector. The size of the post is determined by the load it has to carry. For maximum design load you should be safe using 400 psi, that's about 12,000 lbs. 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. Finally, a single deck beam has a . Info for store-bought 8x8's, etc, would be nice, too. I get by, I feel, because I work hard at sloping the earth real hard and fast away from any structures. S, 2023 Physics Forums, All Rights Reserved. myimages[6]="../../../images/top-banner/EZ-junior.jpg" 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. They correlated right on with trussdoc's calculations. per square foot. However, it is highly advisable not to push the 2x4 material up to its limit. As the cell structure of a particular wood type varies so as the load-bearing capacity. Post heights are based on standard precut stud heights and associated top plate heights. The above listed weights are approximates and are intended as a general guideline only. Thank you for your well-informed responses. Depending on various factors, the maximum span for a 28 floor joist is 16' 6". I'm concerned that a 4x4" would not provide enough load-bearing capacity, but I have no engineering background. Below are some typical moisture contents of lumber. 0.44 pounds is the weight of a one foot section of 22 lumber made from Sitka spruce. 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. Use 2x4s sistered together. document.write('') You would have a better safety factor . The total load for each tributary area is then divided by the area of each footing in order to determine the load psf imposed on the soil. Post heights are based on standard precut stud heights and associated top plate heights. 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. Our mission is to provide our readers with the most up-to-date ideas and approaches, as well as reveal the genuine features that will assist them in selecting the best items for their professions and DIY projects. Over 200+ free JavaScripts here! myimages[4]="../../../images/top-banner/ez50-banner.jpg" What is Zinc Plated and Galvanized Steel? This can vary by species but they can support a lot of weight. It then determines the total load from each tributary area based on the design load of your deck. But usually bearing stresses of the beam on the post or the post on support will control. In other words, look at the wood species, post size and load area and you will see the maximum height of post you can safely use. If a couple of lags and screws make you feel better, GO FOR IT. Certainly, 6x6s would work fine, but then I'd have to buy them; logs a free. sort of. if I ignore my labor. My estimates were based on half loads, which may or may not be a good model. Is the construction new? or 453 kg. I think 6x6 word work fine but not look as nice. . / 298 KG) Wall height is nominal height plus 1 1/8". Have You Read My All-Time Most Popular Post? After 35 yrs it is no longer "perfectly" level, but you have to work at it to notice. Let's break it down, using the large 6-8 person hot tub in my chart above as an example. Seems you've got a pretty good idea what you're up to. Why not beef up the beams and eliminate the posts? 4600 140th Ave N. Ste 180, Clearwater, FL, US, 33762. Considering an 8ft x 16ft dock has three 16ft floats it will support 3 x 16ft x 65lbs = 3,120lbs. What are the Max Watts on a 15/20 Amp Circuit? Man, I gotta take a nap and clear my head for the next job. j. Hahmakes much more sense now. How much a deck can hold depends on a number of factors relating to that particular deck. Z-section steel is usually used in large steel structure plants. 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. //-->. Here is a list of common snowmobile models and how much they weigh (dry weight estimate) - which ultimately contributes to the weight of your trailer: Polaris 600 RUSH PRO-S (432 lbs. 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 width, 12', will be spanned w/ 2x10's, 16" O.C. 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. Sorry about that. We'll say the tributary load of your interior deck footing is 3000 pounds. Exactly what are the initials for? You are looking at a pretty massive beam to carry any 20' span. kips = 1000 pounds. Wetter wood will be heavier than drier wood. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) 393. The Ultimate Hardwood Guide: Benefits, Uses, and Selecting the Best. 3000/1500 is 2. Therefore a post to support this built-up floor beam will need to be 6" by 6". A piece of wood can carry so much weight per square inch of footprint. Use 4 sistered pairs as your corner legs. Anything going horizontal is a beam. 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? Allowable wood stress in compression parallel to grain is 850 PSI. They also can be especially effective when withdrawal loads of large magnitude are anticipated. How far can you span a 66 post? Page created in 1.353 seconds with 39 queries. As an Amazon Associate I earn small commissions from qualifying purchases through this website. Help me pick out a medium size woodstove. You need to place the stud vertically to achieve this particular weight resistance limit. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If you choose pressure treated lumber, take note that 85% of pressure treated lumber sold in the US is southern yellow pine, so that is probably what you have. http://books.google.com/books?id=hFk_result&ct=result&resnum=1#v=onepage&q=round. JavaScript is disabled. so you have 1 of the posts sort of free floating presuably because the extra 1' of span was too much? It is roughly 4,300 LBS for the entire post. 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. How Much Weight Can a Wall Hold . This allows the even distribution of weight through the legs. And a 10-foot-long 26 pressure treated board will weigh around 40 pounds right after being treated. Size sqft. With symmetrical and equal loads the support forces also will be symmetrical and equal. If your 22 is 12 feet long, multiply 12 by 0.44 to get 5.28 pounds. +91-22-61905600 to 699 (100 Lines) exports@citizenltd.com. Let's change that area of 2 square feet into inches. How have you determined the 30,000 lb load? The maximum span for roof rafters is 23' 9". Now, I have discovered that I enjoy creating various shapes and DIY wood stuff using different types of wood tools and techniques. If it is a complex design, focus on the geometry of the structure. For instance, weight applied to a concentrated point on a block via a support column exhibits greater stress than weight spread over a wide area. myimages2[1]="../../../images/top-banner/behindtheforum.jpg" Wood is a viscoelastic material, meaning it will compress and stretch under load. From contributor A: A 6 x 8 will span 12' for flooring. Custom built Cook's-style hydraulic bandmill. Try to find the weakest point in the structure and enforce it to achieve your specific goal. Yes, the 36" footer should raise flags, and code here is also 42" (to the top of the footer). The capacity of a 12' tall 6x6 post varies greatly as described above. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Registration on or use of this site constitutes acceptance of our Privacy Policy. A few examples of these are shown in the picture above.Whitewood Lumber. Skip to content CUSTOMER SERVICE:(800) 299-8981 Left Right Currency All rights reserved. Updated: 00/04/25 While a nail gun is an ideal tool for the job, there are ways to install baseboards without one. For a better experience, please enable JavaScript in your browser before proceeding. It may not display this or other websites correctly. 30". Step 1. on General Board, Started by woodsy random_imglink2() The stand dimensions is : L = 1500mm, W = 1000mm, H = 1000mm ( sorry for metrics.. I'm from SA) I have attached a pic of the stand so you guys can see where it will be braced as well. Over 200+ free JavaScripts here! The lumber weight calculator below will estimate the weight, specific gravity, and density of any species of wood. If you're in Alaska (I'm assuming, Fairbanks?) As has been mentioned, there is simply no way an 8x8 is going to carry 20', even carrying its own weight. A 44 lumber with a length of 8 feet can resist weight from 6000-6500 lbs. Yes, the posts on one side of the beam are sort of "floating" actually they are attached to the wall by a 2x4 "plate" at the bottom, and tied in with a sort of cross brace at the top. If you chose to use cedar post, its maximum height would be 10 ft. Load Area (sf) per Deck Post. First, you divide the tributary load of 1500 - the weight-bearing capacity of the default soil type used to determine building codes. When it comes to how much weight a wall can hold, it really depends on the type and thickness of the wall. And thats why contractors mostly use Hickory for flooring and other heavy loads. /* 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. Considerably Higher Load Capacity Than Traditional Posts. Enter the moisture content in the calculator and hit enter. 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. Capacities are per post/column and allow for a safety factor of 5. It is overkill for your case, but I rather oversize than have it fail on you. We have received your request and will respond promptly. Weight of the spa (empty) = 800 lbs # of gallons of water (525) x 8.34 lbs (how much a gallon weighs) But you need to add up the loads based on values that go with your allowable stress. Thanks for the replies. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. After rereading your post I see you are going to have a gable roof which will give it sheer strength. Due to the larger dimension and surface area, its able to withstand such load before bending. We rarely get anything more than that. People have been using wood as construction materials for thousands of years. If the material can take 50,000 PSI of stress and the load puts 25,000 PSI of stress on the material, the safety factor is 2 (the material is 2 times as strong as the stress from the load). Eventually, you will find the appropriate weight capacity of your structure. The actual dock will weight by itself 10.5 pounds per square foot. if (ry==0) 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. 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 //-->,