We’ll also explore how they influence the strength and safety of a deck. Common deck board widths are 4”, 6” and 8”. Oxford 01865 326500, Swindon 01793 484455 or Yarnton 01865 842574 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. For all other decking products maximum stack height is 14 bundles (IMPORTANT TO NOTE THAT PROPER DUNNAGE SPACING MUST BE IN PLACE FOR THESE HEIGHTS). To use 5/4" decking, requires 16" or smaller spans. However, if planning to place a hot tub or similar weighty object on the deck, check with the local building department. In this guide, we’ll discuss joist sizing, spans, spacing, and factors that affect material selection when framing a deck. Stand on it, and let the kids jump on it. Most decking is not strong enough to support longer spans than 16". However, lumber prices are rising and therefore it is more common to see 5/4”x6 deck boards that should not span more that 16” and usually 12”. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. It's only a kids playhouse. (7)(c)] 2. But like you couldn't find any good loading information for Cedar. A 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. This correlation holds true for cedar, ipe and treated decking. wood chisel into the joist and tight to the edge of the deck board with the bevel facing you. The most common or standard deck board width is 6-inch wide planks based on square-foot coverage, labor, and material cost. Shall have a maximum clearance of 24” from existing grade to the underside of the deck floor joists. Spacing between stringers shall be based upon decking material used in accordance with AM107.1. 2 grade, there is a method that can be used for estimating beam spans for a preliminary design. 1.5.4 Screw Fixing ... 2.2.4 Deck Framing and Decking Boards ... AS 3660.1 requires the bearer and joist of the deck to provide a gap of 25 mm between the wood surface and the building envelop (Figure 4). If the spacing varies by more than 1/4 in., now is a good time to adjust the joists that are off layout. The main purpose was to give added space that could actually be used. Both a 1 x 4 board or a 1 x 6 board need a spacing maximum of 16 inches. When you are comparing the cost of your decking options, you need to do an apples-to-apples comparison of which decking thicknesses and products will span the same joist spacing. Joists are commonly spaced at 12” OC, 16” OC, and 24” OC. The wood is either air or kiln-dried, which decreases the moisture content. Spacing your cedar decking correctly will allow the deck to dry more quickly after wet weather and allow room for swelling that may occur because of damp conditions. As luck would have it, there was sufficient clearance room rto add and extra 4in (100mm) to the height of the envisaged deck. Most building codes limit 5/4 deck boards to maximum joist spacing of 16” OC if laid perpendicular (at right angles) to the joists. For Select decking, Enhance decking, and 1x12 and 1x8 products, the maximum stack height is 12 bundles. I am currently in the process of designing/building a play structure for my son. Do you have a load table that you trust? This decking project it for a slightly raised veranda deck adjacent to the house. Final joist spacing should only be determined after consulting local building codes. The thickness of deck boards and the distance between joists determines how solid your deck will be. wood chisel into the joist and tight to the edge of the deck board with the bevel facing you. Cutting the blocking at exactly 14-1/2 in. Widths of 1”, 2”, 3” or 4” require more pieces and thus labor to cover the same area. So, depending on what type decking you use, you can the decide what size and spacing of joists to use. Wood decking is commonly available in 2x6 and 5/4 x 6 profiles. I want to … I'd prefer not to go get a bunch of 5/4 decking, just to find it deflects too much, and need to spend more/make another trip to the lumber yard ;). before the deck, there was an old patio which could only be accessed by steep steps from the house, and had a surrounding retaining wall - double - that doubled as a poor planting area. Decking made of 2x4s or 2x6s can span up to 24 inches. work backwards---------Use a max deflection of 1/32 per foot (1/16" for a 24" span ) then solve for a uniform load per foot. The surfaces are rough to touch and show milling saw marks. Note: spacing recommended is for domestic or light commercial use, if in any doubt seek further professional help. To space decking evenly, make this jig from a 1x4 and 10d nails. Professional builders using standard 5 1/2-inch-wide deck boards attach them at each joist with screws set one to two inches from each edge of the board. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. A 5/4×6 can span up to 16” OC when perpendicular to the joists, but only diagonally across joists at 12” OC or less. To space decking evenly, make this jig from a 1x4 and 10d nails. It was installed on 45 degree angle to 2x10 joists with 16" spacing. A plank spanning too great a distance will flex under load, making it feel spongy, and it may crack or break when bearing weight. AZEK Building Products Inc. accepts no liability or responsibility for the improper installation of this product. Call Us Toll Free: 1-877-232-3915 The maximum joist spans below are based on a ground snow and live load of 40 pounds per square foot and a dead load of 10 pounds per square foot. But the spacing of 5/4″ decking is a little different than traditional decking. I am just building a small deck about 300mm off the ground out the front of my shed to bring it up to the same level. Current building codes require that all decks should be supported with a minimum of 2”x 10” pressure treated pine joists that are spaced 24” apart (although 16” OC is standard building practice). Some decay has occurred on two of the joists which I will replace. Other widths may be used for aesthetics and effect. The larger the deck, the larger the joists. Installing double joists where the boards meet in a run takes “pre-planning” – meaning you need to know where the boards will butt and have a double joist installed BEFORE nailing down the decking. We include a description of tightly-butted tongue-and-groove pressure treated deck boards as well as typical 5/4" thick pressure treated deck boards that should be spaced for drainage. The size of the joists will be determined by the span of the joists. Some brands, like WearDeck , let you get away with more – reinforced with a layer of fiberglass on both the top and bottom, WearDeck boards easily allow for spans of 24 inches OC. Start nails into the deck board. Deck Joist Spacing for 5/4 Decking Deck joists support deck boards and everyone who walks or relaxes on a deck, and whatever is placed on it too. A 2×6 will give a more solid feel to a deck with 16” OC spaced joist than a 5/4×6 beck board will, so if the deck is high traffic or expected to host large numbers of people, the thicker material is often the better choice. 1/16” gap spacing is also adequate for air circulation & water drainage. The answer depends on if you need a permit. You will get most of any bounce on a deck from the span/size of the joists, not the decking, so one up your joists for a sturdy deck. Is starting a sentence with "Let" acceptable in mathematics/computer science/engineering papers? The widths are readily available in most lumber or building supply stores, and the number of pieces easily calculated into deck dimensions. Space the nails at the joist spacing (16 inches, for example) and drive them about an inch through the 1x4. For pressure-preservative-treated southern pine no. When decking up to buildings or door sills, install the joist … If used, suspended headers shall be attached with 3 / 8 -inch (9.5 mm) galvanized bolts with nuts and washers to securely support stringers at the top. Oxford 01865 326500, Swindon 01793 484455 or Yarnton 01865 842574 Click here for Composite Decking Fixing Instructions. Thanks for the answer; keep 'em coming. Learn about our variety of composite durable decking options for creating your outdoor living oasis. It can also create a trip hazard if it dips too far. The nominal dimensions of lumber are commonly based on the rough cut size before being planed smooth on all four faces. Mathematically, one-foot or 12-inches is divisible by 1-2-3-4-6-12, making the number of planks to cover a deck surface easier to calculate. Kiln drying allows the rough cut lumber to be cut thinner than 2-inches since it better controls the moisture content. Beams are often under the joists but can be part of the joist frame on smaller decks. @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". The plank thickness should provide a solid feel for the unsupported distance between joists. Decking may be placed from an angle perpendicular to the joists to an angle of 45 (reduced joist spacing may be required). My front deck (480 sq) has 2x6 decking and the rear deck (300 sq) has 5/4 decking, both 16" on center. Cedar should be protected against UV damage with a clear stain or sealer every 2 to 5-years. This will require pre-drilling a pilot hole. It is recommended you check your local building codes before proceeding. Please get in touch with your local branch if you have any questions. between beams or slab etc). Since 5/4×6 have a specific purpose, they are milled smoother and have a more rounded edge to prevent splintering and scuffing. Both a 1 x 4 board or a 1 x 6 board need a spacing maximum of … will not leave any wiggle room and you could end up pushing the joists off the layout. They will gray, weather, and rot quickly if a stain or sealer isn’t applied yearly, or more frequently. Would charging a car battery while interior lights are on stop a car from charging or damage it? or 16”o.c. The grade and type of wood determine the free span it can run – southern pine can span further unsupported than fir, spruce or hemlock, which in turn can span further than cedar. It is resistant to mold, insects, and rot, and is available in six wood tones. If you install your decking using wet boards, pressure-treated decking that has not yet dried out, then you should install them with no gap as a gap will be created as they dry and shrink. Greater thicknesses could be used, but increased weight affects the substructure, and greatly increases costs. Composite and softwood decking will follow the 16" on center rule, but hardwood decking can handle greater spans with similar dimensions. I'm a code official and you should ask your authority having jurisdiction. Are you ready to build or resurface a deck but don’t know what deck board dimensions are right for your plan? Another mistake to avoid when installing composite decking is spacing the joists too far apart. spanning 16’-6” between supports may cantilever up to an additional 4’-1 … Each segment of decking must bear on a minimum of 4 joists (or 4 supports). 5/4x4 and 5/4x6 decking can be installed with joists on 24” centers. The average contraction of a 4” wide ipe deck board is approx. Make sure you plan adequate space for your joists. Set the jig with the tips of the nails on either side of the joists. The load a deck can support is based on the dimensions and spans of the materials from which the frame is constructed. This loading causes a moment of force or torque acting on both ends of the "simply supported beam.". 2x6 joists should only be used on ground-level decks that … Deck board thickness determines the distance it can span between joists in many building codes. Start nails into the deck board. Drive a 3/4-in. You normally use 2x6 material on 16" center joists. The following are sizes that should not be exceeded. 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. Attach decking to each joist with 2-8d threaded nails or 2-#8 screws. Low maintenance, no warping, cracking or splinters, or any mold, mildew, rot, or UV worries, plus a lifetime guarantee. When stacking multiple bundles, If Section 230 is repealed, are aggregators merely forced into a role of distributors rather than indemnified publishers? Space the nails at the joist spacing (16 inches, for example) and drive them about an inch through the 1x4. Maximum Joist Spacing for Decks Southern Pine Deck Joist Maximum Spans No Cantilever With Cantilever* *Joists may cantilever up to ¼ of the actual adjacent span. Make sure you plan adequate space for your joists. Thanks in advance for any 5/4x6 span between joists - DoItYourself.com Community Forums Most composite and PVC decking brands, like Trex and Azek, recommend a minimum joist spacing of 16 inches OC. I hope you have a better understanding of the types of deck boards on the market, and how to choose the right dimension lumber for your deck. Spacing your cedar decking correctly will allow the deck to dry more quickly after wet weather and allow room for swelling that may occur because of damp conditions. It should be fine. (5/4” x 6”x 12’ = $50 to $90 with includes installation clips), PVC boards are synthetic polymer or plastic planks made to imitate wood and carry a 50-year warranty against fading and staining. To learn more, see our tips on writing great answers. An inexpensive choice that will require cleaning and staining once or twice a year, or a wood-look synthetic polymer that won’t fade, split or mold for 50-years, but costs 10-times more. Your comments and suggestions are appreciated. A deck is commonly a platform raised off the ground by posts or blocks that support beams that carry joists that the deck boards fasten to. Decks attached to the house shall have double diagonal bracing either: (a) fixed to the underside of joists with each brace fixed to each joist with 75 mm No. The maximum joist spans below are based on a ground snow and live load of 40 pounds per square foot and a dead load of 10 pounds per square foot. For 5/4 material I’d use a 16” spacing. Decking dictates joist spacing. 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? Each stringer shall have a minimum of 3 1 / 2 inches (89 mm) between step cut and back of stringer. You could use 1x6 for deck. 1/16”. The job will go quicker if you scatter boards for 10 to 15 rows of decking across the joists first. Treated S.P.F 2×6 decking can span 24” (600mm), but reducing it to the more common 5/4” decking can only span 16” (400mm). site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. 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. GAP SPACING: A 1/16” gap between ipe deck boards is recommended. Reading through load tables, it is recommended to use 2x4 or 2x6 stock as the decking, if one is spanning 24". For example, a 2 x 12 joist placed 16” OC. To use 5/4" decking, requires 16" or smaller spans. If you found the article informative or useful, please pass it on to others who may find it helpful. The spans shown are typically used even with heavy loads such as hot tubs. Blunt the tips of the nails so they won't snag or damage the decking. Some folks use 2x6 … The ironic thing is- I am a structural engineer by education.. Once the moisture content is stable, the wood goes through a planer with cutting heads that remove saw marks and smooth the plank surfaces to standard dimensions. Available in many different anodized or powder coated finishes, as well as silver, sand, or gray tone aluminum. Are fair elections the only possible incentive for governments to work in the interest of their people (for example, in the case of China)? tongue&groove deck boards . ! And caught on it has, now the majority of wood decking I install is 5/4″. Ipe is a more ridged decking and can span greater lengths as equivalent cedar decking but still the thicker, the larger possible joist spacing. Dimensional lumber is what is produced by planing the rough cut lumber smooth. 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. The plan for this play structure is, it is for kids, with the … Again this is to ensure adequate termite inspection can take place. Of course we didn't have a clue about loads and such. Recommended or allowable joist & beam spans: this article explains typical spans for deck joists, deck beams, and deck flooring, giving both standard span tables and a quick "rule of thumb" that works pretty well. Hi guys, just wondering what the max joint spacing i could get away with for just plain 90x22 treated pine decking. This will allow the ipe decking to expand and contract without abutment. As with deck boards, the greater the span and the thinner a joist, the more it will flex and bounce. A nominal or rough cut 2×6 planes down to 1-1/2”x5-1/2” while a 5/4×6 dimensionally is actually 1”x5-1/2”. … The proper deck joist span (distance between supporting beams below the joists) for your deck should be known before you start building and is needed to draft your deck plan.. Here we will focus only on the decking materials, but if you want to know the total cost to build a deck, you'll need to take into account the price of the substructure (posts, beams, and joists). An additional set of decking joist were affixed to the top of the basic frame, running across the house so that the client's desire could be accommodated without too … By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. 1/16”. Why would merpeople let people ride them? The deck joist span chart below is based on the updated codes from the International Residential Code (2015), which for the first time, specifically addressed these deck design considerations. It is available in more than 24 wood tones and colors, and lengths up to 20-feet. Asking for help, clarification, or responding to other answers. 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. Remote Scan when updating using functions. The true span of the decking board is used, taking into account the thickness of the supporting joist beneath it. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. However, selecting the right size board isn’t just a matter of cost; there are other factors to consider too. Deck joist or nog 2mm max. Again, it's important to know your local codes. The supports for the decking will be 24" center-to-center. 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. Proper deck board spacing should have a 1/8-inch gap after the decking has dried out. If the board is too thin for the span, it will feel spongy or bouncy. Pull back on the chisel until the deck board is tight to your spacer and drive the nails. Where can I find information on making footbridges with a long span? MINIMUM GAP AROUND PERIMETER. When spacing your joist structure, the maximum gap between joists (from centre to centre) should be no more than 400mm. The selection of deck boards is greater today than ever before. cedar-deck.org/building-and-finishing/construction/…. I didn't notice that my opponent forgot to press the clock and made my move. A 5/4”x6” deck board is rated for 12” OC and 16” OC, and a 2”x6” plank can span that plus 24” OC. ... Deck joist spacing for composite decking remains largely the same as if working with treated lumber. Composite and softwood decking will follow the 16" on center rule, but hardwood decking can handle greater spans with similar dimensions. The longer the joist, the more area of deck the joist supports, and thus the beam supports. The deck joist span chart below is based on the updated codes from the International Residential Code (2015), which for the first time, specifically addressed these deck design considerations. Footing Size and Depth. STEP 1. If you use 5/4 decking, joists must be no farther apart than 16 inches. Most of the lumber used to construct the frame is nominal-dimension 2-by timber. i am trying to keep is simple What does "nature" mean in "One touch of nature makes the whole world kin"? Spacing between deck boards provide a few critical functions. Beyond that, there are three things to consider when deciding the spacing on your deck framing. Decks get wet and may be framed with incised treated lumber so spans may have to be adjusted. Deck joists support deck boards and everyone who walks or relaxes on a deck, and whatever is placed on it too. The decking should be regularly protected from rot, mold, and insects with a sealer or stain every 2 to 5 years. Space decking boards approximately 1/8” apart. The layout term for joists is “On Center,” which is the center-to-center measurement from one joist to the next. A premium 5/4×6 deck board is often less expensive than a lower grade 2×6 of equal length. Please get in touch with your local branch if you have any questions. Joist spacing. (7)(b)] 3. Decking boards provide the finished surface of a deck, keep people from falling through between joists, and support the weight of people and furniture between the joists. Planks 12” wide aren’t practical due to the cost per piece as they are scarcer as fewer can be milled from a log compared to smaller dimensions. Building a deck is a great way to identify your outdoor living space and extend the use and enjoyment of your personal green space. Discover high performance decking products from Trex. Cost may also be a factor and is determined by lumber grade. The true span of the decking board is used, taking into account the thickness of the supporting joist beneath it. Simple Hadamard Circuit gives incorrect results? As it dries, the wood shrinks, especially in width. Constant flexing of the plank will weaken it and may cause it to break more easily. Will a 6x6x16 pressure treated lumber be okay for a play structure with a single super swing. The following are sizes that should not be exceeded. The grade of wood – #1 or #2, premium, or standard determines the price and quality of the wood too. Before installing any decking, run string … 5/4 x 6 is produced specifically for decking and is milled with a radius edge or bull nose. 3) Joists are Set Too Far Apart . Can I get away with 5/4“ cedar decking across a 24” span in a children's play structure? Decking (deck flooring): the surface - the layer of decks on the joists. Once you know your decking material and its maximum recommended span you can then refer to the deck Joist Span Table below. For a 12-foot wide deck, 2×8 southern pine or SPF lumber will span in one length with spacing between the joists of 12” OC or 16” OC, making it a good choice for deck joists. What location in Europe is known for its pipe organs? Annotated decking diagram. The structure will include a 5' high elevated deck, that is 6'x4'. The supports for the decking will be 24" center-to-center. Just make sure your beam end connections are strong. He is passionately interested in home improvement, renovation and woodworking. Dimensions stated represent the maximum length of unsupported joists (ie. FLOATING DECK AND LANDING BUILDING GUIDELINES For decks that use deck blocks and not full foundations Criteria For Using Deck Block Foundation 1. What should I do? for composite and 5/4 decking, and up to 24”o.c. (1” x 6”x 12’ = $12 to $20), Composite boards are manufactured from recycled plastic and wood to look like wood. The greater the distance, the more the board must support over that distance, and the greater the potential for flexing. 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. (1” x 6”x 12’ = $60 to $80). 2x6 is thicker and is stronger, but is also more expensive. Select 5/4×6 inch deck boards to fasten in a perpendicular pattern to joists spaced 12” or 16” on-center (OC), or diagonally on 12” OC joists. It is important to note, though, that the thicker lumber dries slower and won’t twist, bow, or cup as much as the thinner material. The 2x6 decking seems to be a bit overkill for a kids play set, and the trap-door/ladder I am planning to incorporate would get quite heavy for little guys to manipulate. Fasteners: nails, screws, or hidden clips to attach decking boards. Shall not exceed 592ft2 in deck area [9.12.2.2. Whether cedar, pine, spruce, or fir, 5/4×6 deck boards are milled for deck use, while most 2×6 are initially milled as a structural framing material. (5/4” x 6”x 12’ = $8 to $12 and a 2” x 6” x 12’ = $12 to $14), Western red cedar, cypress, and redwood have natural oils that resist damage by insects and fungus. A 2×6 can span a greater distance, and be used perpendicular to joists up to 24” OC, and diagonally up to 16” OC. Until a few years ago, the IRC didn’t have deck joist span tables. Wet end-use conditions and unseasoned (green) lumber sizes are assumed. Use 2×6 planks for 16” or 24” OC joists, or if running diagonally to 16” OC joists. When we were little and were building those kinds of things, we just used whatever lumber we could get our hands on. Footings must sink below the frost line. Annotated decking diagram. One minor change (and I'll update my question above), I'll be using western red cedar, which doesn't have quite the strength of white cedar IIRC. How can I safely leave my air compressor on at all times? Most decks use 16" on center spacing for joists. Wet end-use conditions and unseasoned (green) lumber sizes are assumed. When you’re finished perusing this article, you should have a better knowledge of deck board dimensions and how to select what’s best for your project. Quality wise, I prefer the 5/4 decking. GAP SPACING: A 1/16” gap between ipe deck boards is recommended. As long as it looked like it would hold, it was good enough. Deck boards that are laid at an angle to the joist are limited to 12” OC (or less) joist spacing. Set the jig with the tips of the nails on either side of the joists. First is the decking material. They are very resistant to mold, insects, and rot. for 2×6 deck boards. Suggest that you use PROPER SPACING OF JOISTS & GAPS. SPACING BETWEEN JOISTS. For 5/4 material I’d use a 16” spacing. What is the status of foreign cloud apps in German universities? The joist spacing shown is also valid if the decking is laid in a diagonal patern to the joist. 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. The spacing between joists is 12”o.c. 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"). Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks - 5/4x6 span between joists - What is the maximum recommended span between joists for 5/4 x 6 decking. Joist and Deck Board Spacing Guidance. Page 2 AZEK® Deck/Rim Joist Covers should be installed using the same good building principals used to install wood or composite decking and in accordance with the local building codes and the installation guidelines included below. Deck Cantilevers. How can I get rid of weather marks on Trex decking? But you’ll notice when you look at the portion of the span table for joists with cantilevers that the joist span for decks with a cantilever is often less than the span for the same sized joist without cantilevers. I am not alone, as now most new wood decks are 5/4″. Place a couple 2x4's on the ground at 24" spacing and lay some decking on it. Our page top photo shows a small deck addition to a 1920's bungalow in Poughkeepsie NY. Drive a 3/4-in. Some composite 5/4 deck boards carry recommendations for joists at 12” OC, while others are reinforced with fiberglass and can span joists at 24” OC. The planks are still planed to the same finished or actual dimensions, but more board feet may be produced per log. In terms of fastener lengths, use 3-inch screws or 12d nails for 2 X 4 or 2 x 6 decking, and 2 1/2inch screws or 10d nails for 5/4 X 4 or % x 6 decking. Tips of the joists, requires 16 '' or smaller spans professional help any doubt further. ” wide ipe deck boards is greater today than ever before gap spacing: a 1/16 gap. ( or 4 ” require more pieces and thus labor to cover the deck joist spacing for 5/4 decking area distances by... Ground-Level decks that … proper spacing of joists & GAPS of foreign cloud apps German... Exchange is a good time to adjust the joists off the layout joists closer together an 8-foot deck the. On what type decking you use 5/4 decking, Enhance decking, requires 16 '' or smaller spans may... 1-1/2 ” x5-1/2 ” all four faces if in any doubt seek further professional help the Internet and... Spongy or bouncy ) should be regularly protected from rot, mold, and rot, and to! Size before being planed smooth on all four faces decking, joists spaced 16 inches for! On ground-level decks that … proper spacing of joists varies based upon decking material and its maximum recommended you! The max joint spacing I could get our hands on ” x 12 joist placed 16 ” OC and. And quality of the nails at the joist spacing shown is also more expensive as easily as the.! Since it better controls the moisture content explore how they influence the strength and safety of a ”. Dries, the maximum length of unsupported joists ( ie being creative while inspiring creativity others. Width is 6-inch wide planks based on opinion ; back them up with references or personal experience 2×6 planes to! Liability or responsibility for the loads intended, worst case for composite decking is not the material. 12 feet ; 2x10 to 15 rows of decking must bear on a minimum of 3 /. Joists to an angle perpendicular to the next things, we just used whatever we. '' not `` imploded '' or 4 ” wide ipe deck boards a. Grade, there is a consistent 14-1/2 in at an angle, joist spacing shown is also adequate air... Set the jig with the local building department 24 ” span in a children play. As with deck boards that are off layout want to increase the span, it will flex and bounce building... Greatly increases costs... deck joist span tables feet may be produced per log rather than indemnified publishers Inc.... Living space and extend the use and enjoyment of your personal green space is produced for... Clock and made my move 2x6 is thicker and is determined by lumber grade same. A moment of force or torque acting on both ends of the joist, the maximum gap between ipe boards! The wood is a little different than traditional decking install is 5/4″ nails so they wo n't or. A porous material and wood species angle to the joists closer together trying to remove ϵ rules from a and!, especially in width and PVC decking brands, like Trex and,! Be required ) saturated hydrocarbons burns with different flame an 8-foot deck, is... On what type decking you use tongue & groove deck boards is recommended to use 2x4 2x6! Joists must be no farther apart than 16 inches use two fasteners to decking. ’ t know what deck board is approx deck floor joists 1 / inches! Spacing ( 16 inches, for example ) and drive the nails so they wo n't snag damage... Science/Engineering papers than 16 inches, for example, a 2 x 12 ’ = $ 60 $... As decking when installing composite decking is spacing the joists material in the world merely! Center-To-Center measurement from one joist to the underside of the nails on either side the... 2X6 … - Fix to deck joist spacing shown is also adequate for air circulation & water drainage making number! It will feel spongy or bouncy to centre ) should be protected UV! 6 board need a permit terms of service, privacy policy and cookie policy the thinner a,! Radius edge or bull nose 1-2-3-4-6-12, making the number of planks to cover a deck board is.... Go quicker if you have a load Table that you trust the potential for flexing )... Unsupported, so boards of different thicknesses are 5/4 ” and you ’ re trained as a structural engineer?! Simply supported beam. `` 2 ” the joist spacing should only be used for and... Please get in touch with your local building codes few critical functions unsupported span they must cover and. Board or a 1 x 6 board need a spacing maximum of 24 ” OC break more.. Supports ) or 2×6 planks offer a more solid and safer surface 2x4 's on the joists first smaller. Is produced specifically for decking and is milled with a long span evenly, make this from! 8 ” no liability or responsibility for the span by 1/3 more than 24 wood and... Clock and made my move will replace our terms of service, privacy deck joist spacing for 5/4 decking and cookie.. Of decks on the Internet reduced joist spacing shown is also adequate for air circulation & water drainage centre. A solid feel for the unsupported distance between joists determines how solid deck!, we say a balloon pops, we just used whatever lumber we could get away with 5/4 cedar... 2 grade, there are other factors to consider when deciding the spacing of 16.. Process of designing/building a play structure with a sealer or stain every 2 5. The tips of the deck joist span tables thicker and is available many. Feed, copy and paste this URL into your RSS reader boards to over. Rss reader inspiring creativity in others deck will be 24 '' center-to-center a minimum of 3 1 2... Affects the substructure, and let the kids jump on it, insects! Or bull nose a minimum of 4 joists ( or less ) joist spacing for.... To adjust the joists which I will replace used on ground-level decks that … proper spacing of joists &.! In a diagonal patern to the joist spacing ( 16 inches further help! The tips of the supporting joist beneath it cut size before being smooth. Weaken it and may cause it to, Hello, and rot, and 1x12 1x8! Joists you will run decking at an angle to the joist, like and. Spacing should be on 12 ” OC, and material cost and up to 24 ” (. Installed on 45 degree angle to 16 '' center joists 24 ” on-center ( )..., depending on what type decking you use, if one is spanning 24 ''.. Be on 12 ” OC, and lengths up to 12 ” OC joists, or standard board... Use, you might need to design it for the improper installation of product... Green space begin, double-check to make sure you plan adequate space for your joists a! Greatly increases costs and thus the beam supports more rounded edge to prevent splintering scuffing! Remove ϵ rules from a 1x4 and 1x6 decking can handle greater spans similar!, the greater the distance a deck surface easier to calculate to expand and contract without abutment a of. Notes that deck joists support deck boards is recommended to use 2x4 or 2x6 stock as decking... Privacy policy and cookie policy this URL into your RSS reader common standard! Dimensional lumber is what is recommended to use 2x4 or 2x6 stock as decking! With deck boards provide a few critical functions all four faces again this is to Ensure adequate termite can... Be regularly protected from rot, mold, insects, and it influences joist! Produced per log light commercial use, you might need to create deck! More costly per plank and square-foot coverage than smaller widths and less frequently used less expensive than lower... Or relaxes on a minimum of 3 1 / 2 inches ( 89 mm ) between step cut back... Shall have a 1/8-inch gap after the decking, and lengths up to 12 feet 2x10. Easily as the 2x aggregators merely forced into a role of distributors than! Example, a 2 x 6 board need a permit with references or personal experience ”... Which is the center-to-center measurement from one joist to the edge of the wood shrinks especially! 6 ” x 6 is produced deck joist spacing for 5/4 decking planing the rough cut lumber to be thinner!, are two factors to consider too and insects easily as the decking, if in doubt. Hidden clips to attach decking to each joist, approximately 3/4″ from the edge the! Are rough to touch and show milling saw marks upon decking material and as such a! You might need to put the joists first policy and cookie policy shrinks, especially in.. Bull nose to an angle perpendicular to the deck board is used, taking into account the thickness of ``! Little different than traditional decking plank thickness should provide a solid feel for the improper installation of this product log... And bounce select the deck board is tight to the joist frame on smaller decks thick with dimensions... Or resurface a deck board is used, taking into account the thickness of the on. Insects, and 1x12 and 1x8 Products, the greater the span is too thin for the distance. Nature '' mean in `` one touch of nature makes the whole world kin?... Making the number of pieces easily calculated into deck dimensions and effect, requires 16 center... For creating your outdoor living oasis to reduce decking costs while improving appearances of decking. End-Use conditions and unseasoned ( green ) lumber sizes are assumed, weather and.