how much weight can a 8x8 post hold

If a couple of lags and screws make you feel better, GO FOR IT. A standard concrete block's mass is around 17 kilograms (38 pounds). Using the same example 8ft x 16ft x 10.5lbs = 1344 pounds. Alloy is the same as 1015 above, but with 0.20% carbon by weight, contributing to a higher overall strength at a slightly lower . Allowable wood stress in compression parallel to grain is 850 PSI. var imagelinks=new Array() 2003 - 2023 Elite Trimworks. Typically, a deck can hold a minimum of 50 pounds per square foot. One Year Coaching and Mentorship. var ry=Math.floor(Math.random()*myimages.length) woodworkbykirk journeyman carpenter Joined Sep 25, 2011 3,483 Posts Is the end attached to the floor? A six bye six hem-fir post is good to about 26,000 pounds compressive strength. 6x6 is perfectly fine. 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. A few examples of these are shown in the picture above.Whitewood Lumber. Cb = Bearing Area Factor per NDS 3.10.4. Safe loads for wood columns. WOODWEB is a registered trademark of Woodweb.com. 2x4 as a post will support about 1000 lbs, that varies a bit by species. Overall, there are several factors to consider when thinking about how much weight a deck holds. Man, I gotta take a nap and clear my head for the next job. j. Hahmakes much more sense now. } */ You indicate that the four posts support two 24 foot long beams. Depending on various factors, the maximum span for a 28 floor joist is 16' 6". Job Opportunities and Woodworking Services, Dust Collection, Safety and Plant Operation, Vacuum Bag Versus Clamp Jig for Curved Moldings. I have 9' height on parts of my deck being supported by 6x6x16' posts buried 4' in the ground with proper footings. //specify corresponding links below The post is bowing slightly. I also built my addition, about 25 yrs ago, slab on grade, no foundation wall. While a nail gun is an ideal tool for the job, there are ways to install baseboards without one. imagelinks[2]="https://woodmizer.com/us/Sawmill-Blades?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=sawmillblades&utm_term=2022-05-01&utm_content=800x160" Promoting, selling, recruiting, coursework and thesis posting is forbidden. I could not tell how wide the garage is, perhaps 14 feet or so? or 453 kg. The width, 12', will be spanned w/ 2x10's, 16" O.C. After rereading your post I see you are going to have a gable roof which will give it sheer strength. During that period, I got first-hand exposure to a wide variety of gardening and cultivation machinery. 0.44 pounds is the weight of a one foot section of 22 lumber made from Sitka spruce. 4600 140th Ave N. Ste 180, Clearwater, FL, US, 33762. 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. Once you know the unit loads, multiply by the tributary area to each column to determine the load on each column. 16. Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) 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. The actual dimensions of a 66 are 5-1/2" x 5-1/2", giving it a cross-sectional surface area of 30.25 square inches. Answer (1 of 4): Typically we like to limit the weight to about 40 lb/sqft on an unknown 4 slab. Its also great to test firewood for proper seasoning. var imagelinks2=new Array() The material you use to support vertically are your posts. The Ultimate Hardwood Guide: Benefits, Uses, and Selecting the Best. The ultimate load is the defined by area of the roof carried by each post. 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" Our Large Pontoon Floats (22 x 24 x . This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. or 453 kg. Shaded values are limited by the perpendicular-to-grain bearing load, P c , when posts bear on wood sill plates. 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. Ultimate Guide and Reviews of The Best Framing Nailers. Help my basement may not be structurally sound. A stud used in framing work has a weight capacity of around 1000lbs. I agree with "Trussdoc", bow is drying and actual loading is much less that design. Left side are different so watch what you are getting. = 9.8 kN Note! If a particular species of wood can support 1,000 psi, then an 8x8 post can hold 64,000 pounds! A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. But using correct properties and conditions, wood can withstand such deformation. Capacities are per post/column and allow for a safety factor of 5. Close this window and log in. For maximum design load you should be safe using 400 psi, that's about 12,000 lbs. However, that number assumes your deck is to code without the deck's weight taken into account. I confess I didn't actually look over the math to see how it was derived. Span for 8x8 Timber beam. Each 1x6x12 roughly half that. Specifically I want to compare 4"x8"x8' to 6"x6"x8' douglas fir, or pressure treated pine. myimages[5]="../../../images/top-banner/cookie-mizer.jpg" When you have all the data, take the lowest value and add some safety margin. This product is green (wet) and is best suited for outdoor applications. Next select a length in feet and inches. Due to the larger dimension and surface area, its able to withstand such load before bending. myimages2[2]="../../../images/top-banner/behindtheforum.jpg" 3X3 box =54,000 Lb. Post heights are based on standard precut stud heights and associated top plate heights. Related Lumber Wood Engineering Data: Structural Wood Lumber Engineering Properties 5" and Larger on General Board, Started by woodsy Maximum Deck Post Height (ft) Wood Species. How Much Weight Can a Wall Hold . A piece of wood can carry so much weight per square inch of footprint. 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. So, I'd figure on using four 55 gallon barrels just to support the weight of the floating pier. This can vary by species but they can support a lot of weight. In America, typical 6x6 pressure treated (PT) are southern yellow pine (SYP). 16,000. Using a 58 inch (1.6 cm) drill bit in your power drill, drill a hole into the center of 4 of the caps. I'll be putting 4 posts along the length, each side, and running a beam on top. I get by, I feel, because I work hard at sloping the earth real hard and fast away from any structures. I don't know where you are located but around here the 8x8 PT posts are located next to the 6x6 PT posts in all three building supply stores. Lag bolts are used when loads are of relatively large magnitude need to be transmitted through a joint and when an excessively long bolt would be required to make a connection or when one side of a through bolted connection may be inaccessible. As written, this question is unanswerable. myimages[3]="../../../images/top-banner/wm-40-years.jpg" Sorry about that. In any case, 30 kips is a substantial load to be supported by a 6x6 wood post. As the cell structure of a particular wood type varies so as the load-bearing capacity. Depending on each part and the overall geometric design, weight capacity also greatly varies. if (ry==0) I think 6x6 word work fine but not look as nice. We have not been in the house long. Those H2.5a come in right side. your "I-beam" would have been fine if it was screwed instead of nailed I bet, or even just used straighter lumber. Help me pick out a medium size woodstove. JavaScript is disabled. A number of structural factors affect how much weight a concrete block can hold. The above listed weights are approximates and are intended as a general guideline only. Share Improve this answer Follow answered Nov 15, 2017 at 5:19 LRU 51 1 1 7 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). However, if the post is a stronger grade, the strength goes up quite dramatically. To fix the weak link, add more strength or change the material. At 6 feet, it's 10,000lbs. Do not get confused with what weight you might think or want to load the deck with. If a particular species of wood can support 1,000 psi, then an 88 post can hold 64,000 pounds! 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. But again, this is speaking to what I would consider mid-level work as opposed to high end. Please let us know here why this post is inappropriate. 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. I don't know where you are located but around here the 8x8 PT posts are located next to the 6x6 PT posts in all three building supply stores. The weight of the lumber is automatically returned in pounds. Default is 50 psf which you can change. 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. 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. It is roughly 4,300 LBS for the entire post. This is a crucial detail for a wooden structure to be practical and safe to use. So a 6x6 post that is really 5.5x5.5 is equivalent to a circular post with a diameter of 6.6". Live Load myimages[1]="../../../images/top-banner/ez50-banner.jpg" I wouldn't be concerned about a 4x4. Installing new baseboards can be tricky, especially if you don't have the right tools. 1. Yes, the 36" footer should raise flags, and code here is also 42" (to the top of the footer). Next time, I'll send in a sketch. For example, 4 x 6 lumber is not on the list, but you can simply choose 2 x 6 and double the value. For right now, the "span" is 42'. I hope that clears up the confusion. How Much Weight Can a 66 Post Support. In axial compression, wood is typically good for at least 1200 pounds per square inch, so a 6"x6" true dimension post would have an area of 36 square inches, and would be good for about 40,000 pounds in pure axial compression. In another sense; it can hold a V8 engine from the middle without any deformation. Over 200+ free JavaScripts here! As typical post frame construction will have sidewall posts spaced equally, each post carries approximately the same weight. The formulas and tables list nearly every span imaginable along with all the various design loads. If it is stamped "stud" it will be strong enough. Down the road, I'd like to know what load these logs will carry, if properly supported and properly braced against lateral deflection. Values do not consider combined axial and out-of-plane bending. Sponsored Links. I'm in mid-Michigan and code is 42" deep. Here is a list of the wood types that have higher weight resistance. All load capacities are based on axial loads with no moments. What is the maximum span of a 66 beam? myimages[4]="../../../images/top-banner/ez50-banner.jpg" The capacity of a 12' tall 6x6 post varies greatly as described above. (Architectural Woodworking Forum) I just wanted a general opinion based on what you guys have built in the past. Load due to the weight of a mass - m - is mg Newton's - where g = 9.81 m/s2. /* 199. 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. It is also good to know what factors may affect the span of a 28. First, you must consider the amount of weight your deck can hold from the ground up. And a 10-foot-long 26 pressure treated board will weigh around 40 pounds right after being treated. 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. //-->. Info for store-bought 8x8's, etc, would be nice, too. document.write('') The allowable (ASD) loads are based on the 2015 National Design Specification for Wood Construction (NDS). Already a member? What species of wood? What is it you're buidling? The Forestry Forum is sponsored in part by: This number may vary depending on the wood species, grain direction, and water content in the lumber. As for unsupported, yes, if I have my nomenclature correct. Required depth is more a function of your frost line than it is how much support you get from going deep. 6. What are the Max Watts on a 15/20 Amp Circuit? I'm still drawing up my gable roof over deck plans to submit to the building department. Step 1. 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. It then determines the total load from each tributary area based on the design load of your deck. so, what you have listed looks plenty beefy. Other sizes weigh between 28 and 35 pounds, depending on the weight of the wearer. Any professional carpenter will tell you the same thing. Additional information Related products 6" x 6" timbers are suitable for heavy-duty looking fence, pergola, or gate posts. What frames on top of the post? Why not beef up the beams and eliminate the posts? Random Image Link Script- By JavaScript Kit(http://www.javascriptkit.com) vertically. Wall height is nominal height plus 1 1/8". Timber frame outdoor kitchen. Structural engineering general discussion Forum, http://www.southernpine.com/designvalues2.htm, https://www.aitc-glulam.org/TechnicalInfo/tables.asp?type=Column, Low-Volume Rapid Injection Molding With 3D Printed Molds, Industry Perspective: Education and Metal 3D Printing. Treated wood has chemicals (usually MCA or micronized copper azole) in it that will slightly increase the weight. Available only in #1 & Btr Boxed Heart. Maybe I am just lucky, but dry dirt does not heave. Run 2x6 or 2x8 on edge like a header to join your legs. Therefore, a deck of 120 square feet multiplied by 50 shows that your deck can hold 6000 pounds, including the structure. If I understand you correctly, you have four posts in the garage. //specify random images below. 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. Allowable wood stress in compression parallel to grain is 850 PSI. Review - Regency Cascades I1500 Hybrid Catalytic Fireplace Insert, The Hearth Room - Wood Stoves and Fireplaces. 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. Ron. 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. We use cookies on this site to enhance your user experience. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Enter the moisture content in the calculator and hit enter. The side beam allowable download is 1,170 lb. Given the acceptable wood grade and moisture content, a 26 lumber beam can carry up to 700lbs. Helping You to Do It Yourself! 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. Treated wood has chemicals (usually MCA or micronized copper azole) in it that will slightly increase the weight. However, that "footprint" is reduced by the mortises and housings that you cut into it. We hope you enjoy shopping at Elite Trimworks. 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. 3000/1500 is 2. My searching on the Net gives me all kinds of info, but nothing I can understand; too much engineering language. In reality, people usually dont carry that much weight. Working harder than ever. on Sawmills and Milling, Started by TGS As has been mentioned, there is simply no way an 8x8 is going to carry 20', even carrying its own weight. That section discusses calc'ing the necessary post diameter with a given load. One thing to keep in mind, not all wood types have the same strength level. The most common species of dimensional building lumber (e.g. *Eng-Tips's functionality depends on members receiving e-mail. The truss design estimates 30,000# on this post. The most frequent and typical size is 8 x 8 x 16; nevertheless, it is dependent on the block's size and density. Normally all winter we have 5-6" on the ground at all times. document.write('') Registration on or use of this site constitutes acceptance of our Privacy Policy. 10 Reply Sgt_carbonero 2 yr. ago Kiln-Dried After Treatment Timber Columns - Twin Creeks Log Home Supply Kiln-Dried After Treatment Timber Columns. Thank you for subscribing to the newsletter! http://books.google.com/books?id=hFk_result&ct=result&resnum=1#v=onepage&q=round. The standard 8 feet 24 stud for framing work should withstand around 1000 lbs. 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 random_imglink2() This is only an average, however. function random_imglink(){ In addition to aromatic smell and bug-repelling capability, its very advantageous to use in wardrobes and wooden instruments. / 203 KG) Polaris 800 PRO-RMK 163 (408 lbs. 2023 brings the chance for new things and coming back to old favourites. The top of a beam has 2mm (1/12 in) x 2 inch of steel, which is 1/6 square inch. Join your peers on the Internet's largest technical engineering professional community.It's easy to join and it's free. imagelinks2[1]="https://www.youtube.com/c/TheForestryForum?sub_confirmation=1"