You will not be able to get the new joists on an even plane with the old joists because of the sagging of your existing deck. rev 2020.12.3.38123, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. My front deck (480 sq) has 2x6 decking and the rear deck (300 sq) has 5/4 decking, both 16" on center. Adding cross members at the beam center points would be possible, but would double the number of mortise and tenon joints I'd need to make.). Following are tables for the two most common required psf loads for 16 inch joist spacing. Decking manufacturers may recommend anywhere between 12 and 16 inches for commercial decks and 12 to 24 inches for residential decks. Side note: Trex is very difficult to get back up when its been warped. Wood Plank - If you have a wood plank roof deck, it is not recommended that the wood planks exceed eight inches (8") in width due to their propensity for warping.. Plywood - If you have a plywood roof deck, make sure that you have at least 15/32" (or ½") plywood thickness if the rafters are set at sixteen inches (16") on center. Check if rows and columns of matrices have more than one non-zero element? What is the physical effect of sifting dry ingredients for a cake? Sep 04, 19 11:12 AM Before writing anything else, let me warn you that I'm not a structural engineer, and I don't claim any competence in these matters. Is it OK to use 5/4 PT decking on 45 degree angle to 16. by Kurt (Bowling Green, Kentucky) I'm replacing the surface of a 300 s.f. “Five-Quarter” or “5/4” E.g., 5/4 x 6, 5/4 x 4 1” This is the most common decking board sold; based on standard 16” OC joist spacing and type of material, this may be the minimum allowable thickness. Watch out: nobody with any sense actually lays out joists by measuring to their center. or you're running your deck boards at a diagonal, you may need to use 2-by (1-1/2 in. Smaller gaps also mean less airflow, reducing fire hazard. We welcome your comments and Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 5/4 x 6 pressure-treated decking may be placed with each board flush against the next; natural shrinkage will provide the proper spacing. Use the table below to understand the most common board thicknesses: Decking … Spacing between deck boards provide a few critical functions. We divide the deck square footage by the board square footage … The supports for the decking will be 24" center-to-center. When installed 16” on center, WearDeck™ boards can support over 260 pounds a square foot. Install the deck boards tightly together, and pre-drill holes at the ends of boards to minimize splitting. There is a nominal thickness and then an actual thickness. Deck joists are typically spaced either every 12 inches or 16 inches on center. 24" On Center Deck Joists, Code? As a civil non structural engineer, I know you neglected to design for influence lines or worst case scenario loading where your load is distributed at the center of every other joist. And, like hellrazor, I tend to overbuild things. The 2 in. for proper support. Tear off your decking, insert new joists, replace decking. As far as safety goes, it would feel a little "bouncy" to an adult but I'd like to sit back with a beer and watch you try to break it. If you plan on putting down your decking diagonally, 5/4 boards may have more spring in them than you'd like at a 16" on-center floor joist spacing. Thanks for contributing an answer to Home Improvement Stack Exchange! Decking boards span from joist to joist. To my experience, all decking, even wood with tend to sag on 24" centers over time. I'm replacing wood decking that's laid over joists on 24-inch centers. 2x6 is thicker and is stronger, but is also more expensive. I was getting my loading info from here: Most of the regs for spans etc are for maximum acceptable deflection (people tend not to like bouncy floors) rather than strength. It should be fine. NyloDeck is the only 1 inch composite deck board rated to span joists at 24 inches on center and at 16 inches on Strong, yet lightweight, NyloDeck is available in lengths up to 24 feet and spans 24” O.C., saving contractors time and material . Total height of low level ground level deck. AC2® pressure treated pine thick deck decking offers many advantages over standard 5/4 treated decking. I want a composite material and am willing to spend considerable extra to avoid having to add intermediate joists. thick) boards. The distance between two deck joists is measured in inches “on center”, commonly abbreviated as “OC”. Most decking is not strong enough to support longer spans than 16". submitted to our "DoItYourself.com Community Forums". Enjoy that slice of birthday cake at your daughter’s next birthday party, while those crazy neighbor teenagers are dancing on that deck. That creates approximately another 3 inches width-wise that you wouldn't need material to cover. This loading causes a moment of force or torque acting on both ends of the "simply supported beam.". Use 2×6 planks for 16” or 24” OC joists, or if running diagonally to … Composite and softwood decking will follow the 16" on center rule, but hardwood decking can handle greater spans with similar dimensions. If you were to draw a line down the center of two joists and then measure the distance between them as 16 inches, that measurement is 16 inches on center. A Play Structure, however, is exempt from a permit under the IRC, therefore, you can use any material as long as it is safe and need not follow the prescriptions of this code. Item #1264967. I'm just some random guy on the Internet. Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks. Deck Support Column Design . By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Like I said, it's only one or two more joists in the total cost. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. The floor joists must be 16 inches on center. What’s really necessary? Structural Integrity . 2"x4" or 5/4"x4" 2"x6" or 5/4"x6" ... 12" o.c. Or will the quality, sturdiness, bounciness be compromised? Standard 2x lumber is 1.5" thick. But the gaps between your boards must be taken into consideration, too. Generally, an acceptable gap between deck boards is between 1/8 inch and 1/4 inch. Most decks use 16" on center spacing for joists. I want a composite material and am willing to spend considerable extra to avoid having to add intermediate joists. Replacing Deck Boards. Part 1 - 12" Joist Spacing. decking material 24 on center. home improvement and repair website. But like you couldn't find any good loading information for Cedar. It is 15% thicker, and is pressure treated with 15% more preservative than regular 5/4 standard decking. As long as it looked like it would hold, it was good enough. The decking is heavy, the last deck was 10' wide, so i ordered all 20' and cut them since 12' is the shortest. You don't want it to, Hello, and welcome to Home Improvement. You may freely link And, you should probably. If you are installing a commercial project, it can be a good idea to shorten the framing spans as well since the deck will have significantly more traffic. So, depending on what type decking you use, you can the decide what size and spacing of joists to use. suggestions. Must I stick with horizontal flooring? So, in this case, would using 5/4" decking be appropriate? Gap Spacing Guide for Hardwood & Composite Decking … Of course we didn't have a clue about loads and such. Because I couldn't find a good load table (at least not quickly), I tried to calculate deflection and bending stress, and I can't see anything wrong with using 5/4" x 6" cedar boards (actual dimensions 1" x 5.5") across a 24-inch span: Perhaps I did something wrong in my calculations? How far apart should deck joists be spaced? How can I pay respect for a recently deceased team member without seeming intrusive? If you want to do it that way. x 8 ft. Pressure-Treated Hem-Fir Lumber is ideal for a variety of applications, including decks, landscaping, stair support, walkways and other outdoor projects where lumber is exposed to the elements. At least put the extra joists down. "5/4" means the deck boards are only 1.25" thick. for pricing and availability. In this guide, we’ll go over the proper joist spacing for composite decking … Then measure when you’re 4 to 5 ft. away from the house and adjust the gap sizes to be sure the last board … for … If you were to use 25 boards… Wood decking is commonly available in 2x6 and 5/4 x 6 profiles. Gm Eb Bb F. What would happen if undocumented immigrants vote in the United States? For the deck size example provided above, of 200 square feet, you would need 25 boards of this size. Do you have a load table that you trust? Deck Board Spacing. CALI TruOrganics 4-in Deck Board Sample. Compare; Find My Store. Create the center and front double 2x8 beams by adding 2x8s to the existing perimeter frame. Composite flexes, it will be interesting getting the decking up on the 10' high deck by yourself. It is 15% thicker, and is pressure treated with 15% more preservative than regular 5/4 standard decking… x 8 ft. Pressure-Treated The 2 in. Run String Lines to Ensure All Joists Are Level & In Plane. Deck Post to Deck Beam Requirements ... within 24” of each end of deck. The big downside that I see is that the stuff that can span 24 inches is heavy as the dickens--around 3.5 pounds per foot. @Tester101 - Not easily, due to the nature of the design (I am hanging the deck on a 4x4 mortise and tenon frame, with columns spaced at 24". I've looked in the deck codes I have access to and cannot find it. x 5.5 in. And 10 feet off of the ground -- WHY CHANCE IT?? Apr 28, 20 11:17 AM. Spacing between deck boards provide a few critical functions. And I like the option of being able to do the job in pieces, leaving the deck fully usable during my breaks for recuperation. How can I get rid of weather marks on Trex decking? Construction grade, common, and No. Measure to the house at both ends and in the center when you get within about 5 ft. of the wall. 5/4 x 6 is produced specifically for decking and is milled with a radius edge or bull nose. First is the decking material. Wood decking is commonly available in 2x6 and 5/4 x 6 profiles. I'm wondering how stable the decks really are with them. Read More. The old rule when building something, do it right the first time. Oak Island, extending the "Alignment", possible Great Circle? My other advice is, make the job easy on yourself. Here's a link. Help Center. Compare; Find My Store. Also if you need to pour concrete pads and/or piers for the Dek Blocks. All rights reserved. x 96 in.) The fact that your deck is 10' off the ground should make the job of putting in extra joists and hangers much easier then it would be otherwise if you are going to try to do it with the existing deck in place. Asking for help, clarification, or responding to other answers. That's not only much safer, it avoids the long reach down to install joist hangers (or the ladder work to access them from below). Retail Store Location: 6900 151st Street W Suite 100 Apple Valley, MN 55124 Hours: Mon-Fri: 8:00AM - 5:30PM … Install the deck boards tightly together, and pre-drill holes at the ends of boards to minimize splitting. The structure will include a 5' high elevated deck, that is 6'x4'. 5/4x4 and 5/4x6 decking can be installed with joists on 24” centers. The last board won’t look good if it’s skinny or cut at an angle. Place a couple 2x4's on the ground at 24" spacing and lay some decking on it. Complete installation manual is available for this product on line. thick) has become extremely common. It's only a kids playhouse. Some decay has occurred on two of the joists which I will replace. I'm a code official and you should ask your authority having jurisdiction. Deck Boards; Material. For example 2x6 materials can usually span 24” without any noticeable deflection and still support a significant load. This video shows how Trex and other composite decking works on RollingBarge.com products with deck supports on 24" centers. Most other boards can only support 100 pounds a square foot at 16” on center. Prowling the internet, I've found that Trex and Certainteed offer full 1.5-inch-thick decking that will span 24 inches on a residential deck. These are currently the strongest boards on the market. TimberTech AZEK Vintage 12-in English Walnut Wide Width Deck Board Sample. Adjust the spacing between deck boards gradually over the next 10 rows of decking until the distance to the house is equal. You are going to be investing a lot of money in the composite for this deck. 1 boards are top-quality but are usually not worth the extra cost for use in deck building. Don't Forget to Put a Vapor Barrier Under Your Deck when Close to Ground. High-Level Deck Framing Plan: Assemble the perimeter deck frame first, temporarily supported by 2x8s used as posts. Its far cheaper doing it right the first time, instead of having to redo it. Level the entire deck frame. For example: 5/4 x 6 cedar can span 16" on center, but Ipe can be a 1 x 6 dimension for the same span. Deck boards – no matter the thickness (5/4″ or 2″) should always be fastened on top of a DOUBLE joist so there is enough nailing edge on each decking board where they are butted. Building Materials. Why does the FAA require special authorization to act as PIC in the North American T-28 Trojan? The answer depends on if you need a permit. for pricing and availability. Suggest that you use Thickness: Radius-edge, 5/4 material (which can measure anywhere from 1 to 1-1/4 in. When you’re figuring out decking the number one concern for most people is what kind of wood to use. The article explains the key step in placing the first deck board - the line from which the rest of the decking follows. “Can I get away with...” and you’re trained as a structural engineer??? Decking boards come in varying thicknesses that can be a bit confusing. Brown (95) Grey (72) Red (9) Beige (6) Walnut (6) Chestnut (2) White (2) Cedar (2) Brand Name. Joists spaced 16 inches on center will take both 5/4 and 2-inch deck boards (which are actually 1-1/2 inches thick). We marked the joist locations 16″ on center along both of the beams. Sort of like a house with 24" center joists, something I would avoid. Deck Floor Joist Spans - Part 2 Floor Joist Spans For Decks - 16" & 24" Joist Spacing. Making statements based on opinion; back them up with references or personal experience. cedar-deck.org/building-and-finishing/construction/…, MAINTENANCE WARNING: Possible downtime early morning Dec 2, 4, and 9 UTC…. Hellrazor: Thanks for your interest and quick response. Decking made of 2x4s or 2x6s can span up to 24 inches. Here’s why these small gaps have a big affect on your deck and tips for getting them just right. If you were to use 25 boards, 23 of them would have a 1/8-inch gap, but the outer two pieces would not. How to professionally oppose a potential hire that management asked for an opinion on based on prior work experience? But now I want floor boards diagonal...? Everything I have read says that joists should be 12" for diagonal wood flooring. Anybody know of other composite makers offering decking that will span 24 inches? What key is the song in if it's just four chords repeated? I am building a 12x14 deck. ...And you want to increase the span by 1/3 more than what is recommended. Hot-dipped galvanized or stainless-steel is … I am in the process of building a new 22 x 30-ft deck. Discussion in 'Remodel Forum & Blog' started by molo, Oct 21, 2008. molo Member. x 6 in. This will lead to an uneven surface on your new deck. Quality wise, I prefer the 5/4 decking. I am building a 10'x12'deck (not attached to a ledger board). In most cases, it’s best to start with a full board on the outside edge of the deck and work toward the house so the odd board is less visible. When replacing the existing boards with composite decking on a deck with 24-inch frame spacing, you will only need to add joists 12 inches on center between existing joists. deck. For 2x material (1 1/2” thick) I’d use 24” spacing for plastic decking boards and 36” spacing for Cedar, Redwood and pressure treated boards. 3 stock have defects that make them unsuitable for a deck. x 6 in. 2 and better are the best choices for deck building. The primary function is to drain water from the deck. Now we can calculate the number of decking boards needed. Is the energy of an orbital dependent on temperature? for nominal 2" thick SYP deck boards … Feet. I'm a contractor who right now is in the middle of an expensive project involving having to rip up trex that wasnt put down right. Use building code approved fasteners and hardware. For decks with 16-inch spacing, measure and mark each joist that is at 48 inches. Is it more efficient to send a fleet of generation ships or one massive one? Model #SL-87401. I am not sure on the price difference between the regular composite and that heavier stuff, but i would guess it would be a lot cheaper to add joists. Where does the expression "dialled in" come from? When we were little and were building those kinds of things, we just used whatever lumber we could get our hands on. Everybody talks about the extra cost of composite. 2 in. The primary function is to drain water from the deck. Beyond selecting the type of wood or composite decking … Hot-dipped galvanized or stainless-steel is … Copyright© To avoid confusion we mark an X on the side of the line to which the joist will be placed. How can I confirm the "change screen resolution dialog" in Windows 10 using keyboard only? 3. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. UK COVID Test-to-release programs starting date. 1995-2018 MH Sub I, LLC dba Internet Brands. tongue&groove deck boards . Custom cut? The supports for the decking will be 24" center-to-center. Variation drop down. Has anybody used these Dek Blocks to build a deck? Will a 6x6x16 pressure treated lumber be okay for a play structure with a single super swing. It doesn't seem to check as easily as the 2x. Is it OK to use 5/4 PT decking on 45 degree angle to 16. by Kurt (Bowling Green, Kentucky) I'm replacing the surface of a 300 s.f. Posted on October 24, 2013 by Ben Roberts . Well, Lefty--now I have two responses, neither answering my question, but saying, "Don't do it," so then I have to ask: Composite decking can/will/has sagged when its used with the max joist spanning widths. I'm wondering if I can use 2x3s Thanks for any replys! 3-Digit Narcissistic Numbers Program - Python . Joined: Sep 23, 2006 Location: Cold New York. Rebate Center. Get-Prices. It is not officially recommended, and any chart you will find will list 16" as max span (I've even seen a couple that said 12"). Boards graded No. The inspector already failed the deck once because it wasn't 16 inches on center. Min of 1,500 lb stress … You know you design for 1) critical loads not normal loads, 2) “span” means net clear span, 3) impact loading, 4) grade of wood, 5) wet condition of “use”, 6) surfaced two sides or four and 7) repetitive use or single use. Is this a DIY'r job or should I just pay someone? The most popular thickness for decking boards in North America is a 5/4 thickness which is an actual 1” thick. For me, it would be SO much easier to be able to remove two or three rows of the old decking and replace a row at a time. (I have my doubts about your existing being all that good -- but that's another story!!) Deck Board Member Residential Use 60 psf 2x6 24" 16" Direct Screw 5/4, C-Deck G&G *16" 12" Direct Screw, Groove & Groove *12" spans if installing decking diagonally. Are there any contemporary (1990+) examples of appeasement in the diplomatic politics or is this a thing of the past? Deck Board Member Residential Use 60 psf 2x6 24" 16" Direct Screw 5/4, C-Deck G&G *16" 12" Direct Screw, Groove & Groove *12" spans if installing decking diagonally. The point is - I would just follow common sense... @Vitality - Of course common sense goes a long ways, and is what I am trying to do here- common sense with the pocket book. After two full seasons, fully seasoned shrinkage rates of approximately 1/16” on 4” wide boards to 1/8” on 6” wide boards can be expected. How do I replace these with the same size I have now? The eighth-inch spacing provides for a safer surface for walking. Model #SAMP-AVC72512EW. For the deck size example provided above, of 200 square feet, you would need 25 boards of this size. “Eight-Quarter” or “8/4” or “2x” E.g., 2 x 6, 2 x 4 1.5” These thicker boards are the strongest with minimal movement, and they can span the widest joist spacing. This difference doesn't matter for a 16" on-center joist spacing unless you plan on laying your decking diagonally. Built deck frame with joists @ 16" on center. Item #1288007. My advice though is don't do it. Credit Center. What is an allowable decking thickness for joists this far apart? Since the deck is … deck. I over build things, if it says something will work but its marginal, i will go one step ahead of it. Both sizes have their pros and cons. 11 speed shifter levers on my 10 speed drivetrain. Is there a general solution to the problem of "sudden unexpected bursts of errors" in software? Armadillo Armadillo LIfestyle 12-in Bronco Deck Board Sample. You are asking for problems there, i would not use 24" OC for any composite decking. And my last question is what about attaching the whole deck to the house with a ledger board while using the Dek Block Floating Deck System. Step 8: Apply the Decking. If you use 5/4 decking, joists must be no farther apart than 16 inches. Use building code approved fasteners and hardware. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. Do players know if a hit from a monster is a critical hit? Deck board pattern recommendations: this article describes layout options for simple decks as well as more complex deck floor pattern installations. ... Composite decking brands also generally require 12 inches O.C.joist spacing for 45-degree or angled composite deck board … My plan was to pour concrete footings, then run doubled up 2x8 beams setting on the footings. Can I get away with 5/4“ cedar decking across a 24” span in a children's play structure? Install 2x8 joists. for nominal 2" thick SYP deck boards. The 2x4 or 2x6 decking is likely based on the requirements of the International Residential Code which prescribes a 40 psf floor load on any permitted structure, section R105.2. What kind of problem are you concerned about? problems contact webmaster@doityourself.com. The wide majority of decks and deck frames built in the United States feature pressure-treated lumber as the deck framing material. Website operating 24” On Center Supports: Deck Board Size: 1 x 4 Decking: 1 x 6 Decking: 5/4 x 4 Decking: 5/4 x 6 Decking: 5/4 x 4 Decking: 5/4 x 6 Decking: Stainless Steel Decking Screws: 5.7 screws / sq. We recommend using not more than 16" spacing with the 2"x6" and 12" spacing for the 5/4" planks. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Gift Registry. Then we measured each location and cut a joist to that size. Notch the boards around posts or other obstrucbons, leaving 1/8"space for drainage. 16" o.c. Questions of a Do It Yourself nature should be However, lumber prices are rising and therefore it is more common to see 5/4”x6 deck boards … Compare; Find My Store. Your numbers are wrong, visually looking at them. The ironic thing is- I am a structural engineer by education.. I will have 16 centers on ... i'm tearing out my old deck and putting in a new one. But the gaps between your boards must be taken into consideration, too. Some builders reduce joist spacing to 12" on center to strengthen the deck frame or to increase maximum allowable joist spans. Sign In; Cart; Home; Building Materials; Decking & Deck Materials; Wood Decking; AC2® 5/4 x 6 x 24' Above Ground Green Pressure Treated Thick Decking (Actual Size 1-5/32" x 5-1/2" x 24') Model Number: 1110689 Menards ® SKU: 1110689. Height of Deck Against Door Threshold. Lengths: 24 ʹ-30 ʹ Standards: Double skids treated laminated 2×6 Floor joist 24 ʺ on center 2×6 5/4 ʺ treated deck boards Treated Framing Trusses on 48 ʺ centers 29 ga. I am currently in the process of designing/building a play structure for my son. 19.4" o.c. 5/4 x 6 is produced specifically for decking and is milled with a radius edge or bull nose. The joists are 16 inchea... What are people using now and what do you recommend? Angle. Plus you are 10' off the ground, you do not want any surprises. The maximum joist spacing you can use will depend on the size and allowable span of your joists.
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