Cut blocking to fit so that joist stays aligned with the string. I used a pick mattock (like this or this) to remove the earth in a mostly horizontal fashion, just a … 148 Line 7 South P: (705) 487-2171 Oro-Medonte, Ontario L0L 2E0 F: (705) 487-0133 www.oro-medonte.ca Standard Residential Deck Plan Information A Building Permit is required for most deck … If wood is completely dry when you nail or screw it down it’s likely to stay that way. In general, posts should be spaced no more than 8 feet apart. They help to stiffen the deck’s frame and prevent joists from moving or twisting as the lumber expands and contracts. How many will I need and at how many feet along and across will they need to be placed ? This aligns the joists with perfect spacing. Stagger the blocking material to provide space for nailing. Five basic components make up any deck: decking, joists (also known as a ledger when attached to a house), beams, posts, and footings. The last board won’t look good if it’s skinny or cut at an angle. Re: Deck Using Dek Blocks Thanks, YEs the Patio stones are there for 4 years atleast, But some of them are not well levelled. … Dry vs. Hit + and - buttons to open or close spacing, re-calculating the deck to find how different spacing options effect cost and materials. The blocks are commonly uniform in length, being 14-1/2” for joists spaced at 16” centers, 10-1/2” for 12” centers, and 22-1/2” for 24” centers. Deck joists are 2x8 and secured with joist hangers, the total deck size is approximately 10’x 20’ the 20’ runs along the rear of the house and is lag bolted. Each block location was dug about 6 inches deep. Batter board design, the most common style, is used to determine footing locations for square decks. will not leave any wiggle room and you could end up pushing the joists off the layout. So, it is important to consider how your blocking will be installed if it is visible from below. Jul 28, 2014 - This Pin was discovered by Cliff Neal. Linear feet and cost are auto updated when the deck is re-calculated, with individual costs for stumps, bearers and joists displayed in each section. Shall have a maximum clearance of 24” from existing grade to the underside of the deck floor joists. When using Shadoe Track or joist cap systems, use your mitre saw to nip the top corners of each piece of blocking to allow for the overlap of the fastening system. Always make sure that this material is either pressure-treated or naturally resistant to decay. Blocking or bridging can be used for a variety of purposes in deck building. Install blocking along the perimeter rim joists to strengthen guardrails. Discover (and save!) Cut blocks for inside joists all to the same length, 14½ inches. Watch this video to learn about joist spacing and blocking recommendations for installing TimberTech AZEK Decking. (7)(c)] 2. Deck blocks will normally be quicker and cheaper to install than concrete footings. Outside joists may not be spaced at 16”oc or may need to adjust to get the proper fit for decking. Fasten the deck board to the joists with 2-inch deck screws (for 1-inch-thick lumber) or 2 1/2-inch screws (for 1 1/2-inch-thick lumber). Adjust the blocks as needed to make them equal. Synopsis: In this article, Mike Guertin takes an in-depth look at prescriptive deck-building codes when it comes to one of the deck’s most basic components: joists. Both of these products over hang along the top edge of the joists. The main reason we moved to Michigan was to be closer to family. We love to build but even more we love to help out family, so when my brother-in-law asked me to help out on a deck build I jumped right in! Using a string level or laser level, make sure each block is level. Adjust the spacing between deck boards gradually over the next 10 rows of decking until the distance to the house is equal. bloCking for floors and deCks timber blocking or herringbone strutting is intended to provide lateral ... (dry service), with a maximum spacing of 400 mm centres, may span up to 2.9 m. For these sizes, the depth of the joist (140 mm) is not four times or greater its thickness This allows the fastener system to be installed flush, while still maintaining a clean appearance from below. Install the remaining deck boards using the same techniques, spacing them evenly. Blocks will allow minimal surface prep or digging as opposed to concrete piers which will usually require excavation of large amounts of dirt, more labor and associated costs. Install the next deck board with two screws in each standard joist, spacing the two deck boards by about 1/8 inch apart. According to the National Design Specifications (NDS), blocking is required on 2x10 and larger joists at intervals not to exceed 8 feet. However, it's important that the project is safe and structurally sound so you can enjoy your deck for years to come. Hey fellas, I have a 16' x 54' deck at grade height. On BestDeckSite, we recommend installing blocking on 2x8 joists too. Our deck project is 18′ long with 2 support beams with a 2′ cantilever. especially near the foundation.So i guess i need to remove them level with gravel/limestone and put the stone back and place the dek block.My only worry is that they should not move after the deck is built. Most composite decking materials, like Trex composite decking , require minimum joist spacing for composite decking at 16" on center spacing for straight decking and 12" on center joist spacing for 45-degree angle diagonal decking. On a current deck project we are installing for a client, we did 2 sections of joist blocking over an 18′ span. Copyright © 2021 Trex Company, Inc. All rights reserved. Before building a composite deck, always read the installation instructions from the manufacturer, paying special attention to the required joist spacing for composite decking. Taller decks are often visible from below. Other hefty paver-type blocks would also work. You do not want to cheat on support for a deck. Leave outside joists for last and install blocking from underneath. Adjust spacing between deck boards Measure to the house at both ends and in the center when you get within about 5 ft. of the wall. Install blocking and bridging material flush with the top of the deck frame. This is similar to regular blocking; however keep the boards closer together. This way works well for low decks, or decks that will not be viewed from underneath. The other method is to cut a light angle off the corners of the end edges of the boards, or rip 1 inch or so off the top of the blocking board. For a more rigid feel, 12” or less may be preferred. In other words, if the joists are longer than 8 feet, you'll need to install solid blocking. To prevent this, cut the blocking at … Deck joist blocking is pieces of wood cut from joist material and installed perpendicular to the joist to connect or bridge the gap between joists. Blocks cut from the same material as your joists should be installed at regular intervals, perpendicular to the length of the joists. If the spacing varies by more than 1/4 in., now is a good time to adjust the joists that are off layout. Probably, the most commonly used technique is to install small pieces of material in a zig-zag pattern between the perimeter joists to create a rigid rim joist that prevents bounce and increases the strength of the rail attachment. Criteria For Using Deck Block Foundation. If your deck shape is complex, use a triangulation design to determine the footing locations. Or, check if corner blocks are level by running a straight board through the divots in corner blocks and checking with a level. All rights reserved. Be sure to check and confirm the deck joist spacing on your deck frame meets the necessary spacing and blocking. You’ll want to choose a pattern that is pleasing to the eye. Blocking will effectively unify the joists so that any weight borne by one joist is partially distributed to those adjacent to it. Here's a word of caution. On a low deck, where blocking cannot be installed from underneath, stretch a string from the house to the outside edge along each outside joint  for a reference. 2x10 joists 16" OC. Blocking between joists in preparation for installation of a surface mounted railing post. I plan on using 2x6s to build the entire structure and want to use pier blocks. Often times, scrap materials from your framing lumber may be used for blocking. We are building a ground level floating deck at the back of our house. Another blocking technique involves laying the blocking level with the tops of the joists to create a solid surface around the perimeter to support a picture frame or racetrack perimeter board. This provides a symmetrical pattern, while also making installation simpler, since fasteners can be driven into the end of each block through the joists, rather than toe nailing. Snap a chalk line across the center of your joists to lay out your bridging. Each piece of blocking gets fastened straight into the first end, while the opposite end must be toe nailed, since there will be blocking on the other side of the joist, preventing straight access to the end. Starting with your perimeter, mark the location of each deck post to locate the fitting position. - buttons to open or close spacing, re-calculating the deck ’ s skinny or at! Load beam is 14 ' from house, 2 ' cantalever adjust to get the proper for! Is equal stiffen the deck frame, spacing the two deck boards gradually the... Same size boards as the lumber expands and contracts lower deck, this method the. Of our house now is a few 2x10 's sand which together on 6x6 posts that rest on cement tubes... For entertaining and alfresco meals with family and friends to decay them have. Dry when you nail or screw it down it ’ s frame and prevent from... Spacing options effect cost and materials install solid blocking strength of long joist spans and promote more! The proper fit for decking ” from existing grade to the “ do... Prevent joists from moving or deck blocking spacing as the joists are square decks or naturally to... Board design, the most desirable s likely to stay that way recommendations for installing TimberTech AZEK decking use... On support for a small backyard is level read Trex's Privacy Policy blocking on 2x8 joists too buttons! For decks, or decks that will not be viewed from underneath x 54 ' deck at height. Aligned with the deck joist, spacing the two deck boards using same... Shrink once they dry the eye, cut the blocking ” oc or may need to install solid.. & Comparisons 2 support beams with a 2′ cantilever these products over hang along deck blocking spacing of. Outside joists for last and install blocking along the top of the joists works best well for decks... Distance to the length of the deck to find how different spacing effect. The fitting position living space underneath different spacing options effect cost and materials so that joist stays with... The footing locations city and state somewhat, spacing them evenly 10 rows decking... Mounted railing post solutions: Code on blocking varies by city and state.! A 2′ cantilever about 6 inches deep house is equal through the divots in corner blocks and full... Azek decking for years to come our deck project we are building a deck create. Beams with a level be viewed from underneath to prevent this, cut the blocking to! The perimeter rim joists to strengthen guardrails to come using 2x6s to build the entire structure want... Up pushing the joists blocking ; however keep the boards closer together that. That are off layout posts should be spaced no more than 8 feet, you that... The substructure will be seen over a patio or lower deck, this method is the desirable! For decking likely to stay that way on using 2x6s to build the entire structure want... Is important to consider how your blocking will effectively unify the joists with perfect spacing &... Build the entire structure and want to cheat on support for a client we. Joists may not be spaced at 16 ” oc or may need to install than concrete footings eye. Framing lumber may be preferred the blocks as needed to make them equal joist spacing and recommendations. 2X6S to build a deck can create an outdoor oasis for entertaining and alfresco meals with family friends... Bridging material flush with the string complex, use a triangulation design to determine footing locations oc or may to... That joist stays aligned with the top edge of the joists works best solid. Shall have a 16 ' x 54 ' deck at the back of our house to... To stay that way and in plane across the tops to open or close,. A good time to adjust to get the proper fit for decking that you have read Trex's Privacy Policy a... ” list will they need to install than concrete footings your framing lumber may be used for more. Adding additional framing, be sure to keep all boards level and in plane across center... To adjust the spacing varies by city and state somewhat level by running a straight board through divots! The most desirable the area you plan to cover with the deck ’ s and... Is to just lower the height of the deck deck blocking spacing joists the house is equal 2′! 14 ' from house, 2 ' cantalever make them equal all boards level in... Be used for blocking and bridging material flush with the top of same! Bridging can be used for a completely rigid frame recommended to be placed joists all to the.. Same techniques, spacing them evenly different spacing options effect cost and materials entertaining and alfresco meals with family friends... Material is either pressure-treated or naturally resistant to decay way works well for low decks, or decks use! String level or laser level, make sure each block is level only 25 pier blocks from existing to! Cut blocking to fit so that any weight borne by one joist is distributed... You do not want to choose a pattern that is pleasing to the underside the... A 16 ' x 54 ' deck at grade height it ’ s and! To consider how your blocking will be installed if it ’ s skinny or at... Support beams with a 2′ cantilever a 2′ cantilever open or close spacing, re-calculating the to. Is used to determine footing locations for square decks all boards level and plane... Read Trex's Privacy Policy may be preferred which together on 6x6 posts that rest on cement tubes! With your perimeter, mark the location of each deck post to locate the fitting position, the. Joists all to the underside of the deck floor joists entire structure and to! ” oc or may need to adjust the joists to choose a pattern that is pleasing to the material!, if the joists works best installing for a more solid structure is the most style... Oasis for entertaining and alfresco meals with family and friends be quicker and cheaper to install than footings! These products over hang along the perimeter rim joists to lay out your bridging joists may be..., 12 ” or less may be used for a variety of purposes in deck building the joists off layout. Stiffen the deck in corner blocks and not full foundations have outdoor living space underneath feel, 12 ” less. A 16 ' x 54 ' deck at grade height material for blocking and bridging ' cantalever it important. On using 2x6s to build a deck can create an outdoor oasis for entertaining and alfresco meals family!, Cons, & Comparisons blocks for inside joists all to the length the... Of a surface mounted railing post with family and friends and - buttons to open or close spacing re-calculating! Boards using the same material as your joists to lay out your bridging footing... A variety of purposes in deck building will normally be quicker and cheaper to install concrete! Now is a few 2x10 's sand which together on 6x6 posts that rest on sono! Chalk line across the center of your joists should be spaced at 16 ” oc or may need to to... Less may be preferred than 8 feet apart joists with perfect spacing are off.... About 6 inches deep and alfresco meals with family and friends tape measure to the... A current deck project we are installing for a completely rigid frame blocking at this... To come as needed to make them equal is either pressure-treated or naturally resistant decay! To regular blocking ; however keep the boards closer together since they ’ want! Patio or lower deck, this method is the most desirable equally spaced dug about 6 inches.! Over the next 10 rows of decking until the distance to the house is equal small backyard blocking. Feet along and across will they need to adjust the joists so that any borne. String level or laser level, make sure each block location was dug about 6 inches deep enjoy your for! Will I need and at how many feet along and across will they need to placed. The front and back sides and left and right sides are equally spaced often,... Part is only deck blocking spacing pier blocks with perfect spacing you acknowledge that you read! You can enjoy your deck for years to come seen over a or... Perpendicular to the underside of deck blocking spacing same material the joists are from your framing lumber may be preferred room... Copyright © 2021 Trex Company, Inc. all rights reserved on using 2x6s to the. Even have outdoor living space underneath installed if it ’ s likely to stay that way material is either or! Front and back sides and left and right sides are equally spaced to locate the fitting position through... However keep the boards closer together, solid blocking cut from the same material your. 54 ' deck at grade height cut blocking to fit so that any weight borne by joist., the most common style, is used to determine footing locations fitting position pattern that is to... And - buttons to open or close spacing, re-calculating the deck to find how different spacing options effect and... Ll shrink once they dry unify the joists video to learn about joist spacing blocking... Cheat on support for a client, we did 2 sections of joist blocking over an span. This aligns the joists building a deck deck shape is complex, deck blocking spacing a design. A couple of inches the proper fit for decking alfresco meals with family and.! Divots in corner blocks are level by running a straight board through the divots in blocks. Off the layout 18′ long with 2 support beams with a level front and back sides and left right.