You will usually need to pre-drill a 5/16” pilot hole into the rim joist if you are using ½” lag bolts. I am using a pressure treated 2x8x12 since my deck is 12 feet wide and my joist height is 8 inches. (3) Anchor bolts shall be used to secure ledger boards to flat insulating concrete form walls and shall be, (a) embedded in the wall to a depth not less than 100 mm, and (b) spaced in accordance with Table 9.20.17.5. ADDITIONAL RESOURCES: Deck Ledger tech bulletin Visit LedgerLOK product page. I'm trying to determine which method, from two different texts, provides the most accurate way to calculate the bolt shear at the interface of a ledger & bond beam subjected to a chord force. As a rule of thumb, bolts can be spaced 16" ⦠down from top and up from bottom of ledger and staggered up-down. i have been following an online guide and its good and i will try your idea. For immediate access to in-depth information on selecting a bolt size and spacing, Bolt Tables, water-tight metal flashing details, proper end-edge distance bolt spacing to achieve full strength, as well as, comprehensive coverage of all aspects of gazebo and deck building, get a password and log-in now. âThrough boltsâ are driven into brick or stone, then protrude through the ledger, where they are fastened with a nut. For steel ledger, spacing is based on a combination of ledger gauge & anchor bolt diameter. if the joist span is 10 feet and the ledger is attached to a typical 2x band/rim joist using 1/2" lag screws, 15" spacing schedule is sufficient for 40/10 live/dead load. Of course, Weyerhaeuser only lists 'lag bolts' and not through bolts. Bolt spacing is typically 16"oc for 1/2" bolts and 12"oc for 3/8" bolts. Temporarily support the ledger Temporarily secure the ledger board to the correct location against the concrete wall using concrete screws or temporary supports. Prescriptive spacing table with a reinforced rim board and wood structural panel (WSP) on the wall; These tables list the maximum on-center spacing for the BVLZ to support different deck spans. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. Now your local inspector may give you a nod to use the IRC ledger attachment table to mount a ledger to a house with TimberStrand rim board, but that is solely at his discretion. Learn the correct LedgerLOK fastening pattern for attaching a deck ledger to the rim board of a house. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. There are solutions and I’ll address them in future postings. This is a side view of the perspective diagram above. When ledger board is attached to your home, a staggered bolt pattern should be used to decrease the possibility of a crack forming along the length of the board and causing it to fail. These replace lag screws and through-bolts, have been coated with a proprietary three-step coating process that protects against corrosion (even in pressure-treated wood) and are ACQ-approved. Ledger-board attachment is a key element in deck failures. bolt with spacer option over the siding unless it’s T 1-11. The lags should pass through by at least 1/2" on the back side of the band board. Size and spacing of deck ledger connectors are based on gravity loads only and do not include wind and seismic forces. I'm attaching a ledger board to the house for a deck - ground level, so no permit is required. The table includes ½ in. Typically, you will need to install your bolts alternating high and low 2" from the top and bottom of the ledger board. lag screw and ½ in. There’s lots of important info on fastener installation, construction details and building material limitations. The lag screws or bolts shall be placed 2" from the bottom or top of the deck ledgers and between 2"-5" in from the ends.The lag screws or bolts shall be staggered from the top to the bottom along the horizontal run of the deck ledger. 2" min. Be sure to know what you are connecting to. Terms of use. They are usually installed in a zig-zag pattern. The on-center spacing of the lag bolts will be determined by the length of the ledger board. If so, you're asking for problems with the connection from the rim board ⦠A ledger board is a horizontal piece of lumber attached to a wall to support the ends of deck joists. Through-bolts should be a minimum of ½- inch in diameter, and have washers at the bolt head and nut. © 2021 The Taunton Press, Inc. All rights reserved. Upon my own research it seemed the accepted way to handle this is to take a piece of 2 by into the inside of the I of the joist, and run a carriage bolt, through the ledger board, sheathing, rim joist and finally the added block, and to do this twice, staggered and 16" OC for each joist after that. If a 1/2" thru-bolt is used, the spacing could be almost doubled. bolt spacing when the ledger is spaced away from the wall sheathing using stacks of washers. 5. Longer joists will require tighter bolting patterns. I'd check with my local official before trying it. Attach the ledger with 1/2-inch-diameter lag screws or bolts every 16 inches (or as specified by local building codes). Spacing ledgers off the wall has been a code-accepted practice since the 2009 when the International Residential Code (IRC) included a prescriptive ledger fastening table for ½ in. Preventing ledger board wood rot. This is a good idea. Decks Project Guide. Bolts and screws must be located 2 in. The fasteners must be spaced in accordance with Table R507.9.1.4. Just don’t forget to read the fine print (AKA Footnotes) beneath the table and other code sections. Ledger bolt spacing from chord force StrEng007 (Structural) (OP) 28 Jun 17 16:14. Plus ⦠The table columns list joist span ranges in two foot increments from 6 ft. to 18 ft.; the rows list the three fastener options; and the table matrix shows the fastener spacing in inches. This puts the ledger fastening issue to bed; no more rule-of-thumb fastener spacing and no more conflicts with building officials – it’s all there in black and white. They should have a washer or a large head. for those who like the flow-through design. It is very important that you use the correct size and type of fasteners to install your ledger board. In a ledger board application, a ½” x 4” lag bolt was tested to provide 180 lbs support of allowable shear load per screw. Installing a Deck Ledger Board Around Vents, Pipes and Spigots, Ledger Board Attachment to a Solid Concrete Foundation Wall. The ledger board can now be prepared to attach to the house. The final step is to tighten the anchor to expand the shield to create the attachment. Strong-Drive SDWH Timber-Hex HDG Wood Screw (30-Pack) #9 x 3-1/8 in. In order to accommodate your specific deck joist spacing, you may decrease the spacing listed in the prescriptive spacing tables. x 6 in. Previous 1 2 3 Next I've decide to use the anchor bolts for holding my ledger board instead of the ICF Connect or the simpon strong tie .What is the proper spacing for the 1/2" J bolts? The ledger can be attached using one of three methods. Next, you set the sleeve anchor into the hole so that the washer or head is flush with the material being fastened. It’s available in 3 5/8” and 5” lengths and comes in 50- and 250-piece cartons. Lag screw tips must penetrate the house rim joist – that’s at least ½ in. No building finishes, such as stucco, brick veneer or wood siding shall be installed between the deck ledger board and the rim joists. My architect is out of town until the day I pour so he Always follow the manufacturer's instructions when installing sleeve anchors. EW Rim material must be solid LVL, LSL or PSL. • Sheathing: 15⁄32" or 7⁄16" OSB sheathing. 8" ICF wall with 12" J bolts. You can't read too much into the code by making the inference that because a product has an ICC-ES report that a prescriptive table in the code book will apply directly to that product. ThruLOK Through Bolt Replacement. What should I do? Make sure the bolts are compatible with pressure-treated wood. Standard bolt patterns are based on a solid connection to a solid-sawn and fully supported band joist in the home. I am aware of the requirements when it comes to the distance from the top and bottom edge of the ledger the bolts can/cant be, but what about spacing horizontally between the bolts/screws? Sleeve anchors are hardware devices used to fasten to concrete. Typically, you will need to install your bolts alternating high and low 2" from the top and bottom of the ledger board. LedgerLOK replaces lag screws and through-bolts and the ⦠Check with your local municipality to see for sure. Never counter sink bolts. Installation usually involves drilling a hole in the concrete to set the sleeve anchor. 4. IRC R502.2.2.2. • Ledger: 2 x pressure-preservative-treated No. When attaching a ledger board to a concrete or masonry wall, use 1/2-inch expansion anchors. Deck ledger connections shall be designed in accordance with accepted engineering practice. My existing deck's ledger board doesn't have flashing. Your bolts or screws should be long enough to extend at least ½” past the board you are attaching to. 1/4 in. LedgerLOK is a code-compliant deck ledger board to rim joist structural wood screw that can be attached with no predrilling. 5 in. This gives you something to hang your hat on when discussing your ledger attachment with the building official. It's a code-compliant structural wood screw engineered to fasten a deck ledger board to the rim joist of a house with no pre-drilling. First step in preparing the ledger is to cut some blocks of pressure treated wood from a 2×8 to act as spacers between the ledger and the house. Bolts should be staggered between joists and located 2" from the top and bottom of the ledger board. Become a member and get unlimited site access, including the I was looking for the OBC dealing with this, but can't seem to find it. • Rim joist: 2 x _ Spruce-Pine-Fir lumber or 1" minimum Engineered Wood (EW) Rim. **Refer to Lag Bolt Spacing Table** Ledger Board Fastener Spacing and Attachment : 2" min. Ledger Board. ... a 1/2" hole should be drilled through the ledger only. Table of Bolt Spacing for Deck Ledger Spaced Away from the Building in total. 18. The table immediately below gives the bolt spacing requirements for connecting a deck ledger to the building when the ledger board is bolted directly to the structure. The built-in washer head eliminates the need for an additional washer, saving time and money. The only change is in the footnotes.]. Some require more. lag screws and machine bolts. typical spacing approved fasteners; stagger in 2 rows 5.5" min. Temporarily nail or brace the ledger in place, positioned and leveled at the desired height. By clicking GO!, you acknowledge that you have read Trex's Privacy Policy. Spacing is closer for a 14 gaug hieve the equivalent bolt/ledger capacit y. The bolts must fall on a 2 inch line above the bottom and below the top of the ledger board. In this instance, minimum 1/2" lags are staggered along the length of the board. For decks connected to the band joist of the house, the deck ledger should be connected to the house with ⦠The piece of wood that connects a deck to a building is called the ledger, or ledger board. x 9 ½ in. Ledger Board to Hollow Masonry - Inspection Gallery ... ledger board masonry hollow exterior decks balconies internachi 3d inspection upload without ledger board bolt spacing You aren't attaching this deck to a cantilevered floor are you? This is the preferred fastener by most professional deck builders. One method produces a shear value that is exactly two times the other. Sleeve anchors are also used to attach deck ledger boards to solid concrete foundation walls. The bolts and lags must be hot dipped galvanized or stainless steel. The fasteners must be compatible with pressure-treated lumber to prevent corrosion. You can attach the ledger over gypsum or foam panel sheathing provided the ledger to rim joist thickness is no greater than 1 in. staples capable of transferring ledger board forces to the rim joists. Lag screws that hit wall plates or studs may not be comparable. Tiger Claw TC-G Hidden System. Douglas Fir LVL – no attachment is allowed to strand lumber, SYP LVL, the mudsill, I-joists, floor trusses or other materials. Some codes permit the lag screws or bolts to be as close as 2 inches from the ends of the ledger board; however, avoiding the very ends of the ledger boards minimizes splitting from load stress. Introduction. To address this problem, new prescriptive requirements for the attachment of deck ledgers were adopted in May at the International Code Council conference in Rochester, N.Y., and will be included in the 2007 International Residential Code Supplement.. An event underlining the need for this code change ⦠The prescriptive fastener table is great when you’re mounting a conventional ledger to a conventionally framed house with screws or lags; but what do you do when you want to use proprietary structural screws like Simpson Strong Drive Screws or FastenMaster LedgerLoks, or when you have existing siding you don’t want to disturb? ONE THING TO CHECK!!! by Cheri B. Hainer. bolt with the ledger spaced off the wall sheathing by ½ in. It is one of the most common ways of connecting the ledger to the band board. 6. Is their a maximum ⦠Minimum concrete compressive strength, f'c, is 2500psi (17.25MPa). Copyright © 2021 Trex Company, Inc. All rights reserved. (2) The ledger boards described in Sentence (1) shall be not less than, (a) 38 mm thick, and (b) the depth of the floor joists. The bolts at the ledger board are inadequately sized. for 2x8 6.5" min. Regarding 1 1/4" TimberStrand - it is a product that is an alternative to dimensional lumber. "lag bolt". Removing Stucco Siding For The Ledger Board. Star Drive Bugle Head Multi-Purpose Framing Screw Extended Contractor Pack (720-Piece) Can I attach my deck to a hollow block concrete foundation? Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. As a rule of thumb, bolts can be spaced 16" on center for supporting joist span up to 12' in length. Attaching The Ledger Board To The House. ThruLOK Through-Bolt Replacement. Be careful using that math! One interesting thing on pg 4 of the TJ literature, Weyerhaeuser lists a load rating of 475 lbs per 1/2 in. Please help me with my laziness. bolt, ½ in. In the article "Attaching Deck Ledgers" (8/03), the authors used a procedure from the National Design Specification for Wood Construction (NDS-2001) to calculate the required on-center spacing of lag screws and bolts for deck-ledger-to-band-joist connections for various deck widths.Although the calculated spacings were "to code," they were too tight to be practical. It is important to note that the ledger board should only be attached to the house's solid wood rim joist and structural sheathing, and not to the sill plate, floor truss, or siding. This will significantly weaken the ledger board. When attaching a ledger to those other rim joist materials you must have the connection designed by an engineer. Sleeve anchors are commonly used in deck construction to attach post base connectors to concrete deck footings. Max gap between ledger and wall sheathing is ½ in â so no, you canât use the ½ in. Start your subscription today and save up to 52%. Installing A Ledger Board Around A Corner, Attaching a Deck Ledger Board to Engineered Floor Joists. Max gap between ledger and wall sheathing is ½ in – so no, you can’t use the ½ in. 2 grade Hem-Fir lumber or better. The 2009 IRC gives us a prescriptive bolting and lag screwing schedule to follow when mounting a deck ledger to a house. ... ThruLOK Screw Bolt Fastening System. Preventing ledger board splits. Re-check for level, and then drill lag-screw or bolt pilot holes through the ledger and into the houseâs framing. 7. Sounds as if you are putting a floor in a clear story room, 1/2 way up. Your deck will depend on the load-carrying capacity of these screws or bolts to support hundreds of pounds and prevent the deck from ripping away from the house. (see photo) [NOTE: The 2012 IRC – 2018 IRC all have the same table. Hundreds of articles and videos by top deck-building pros on how to design and build a beautiful, sturdy, and safe deck. House rim joist must be minimum of 2x sawn lumber or 1 in. LedgerLok Coarse Steel External Hex Drive, Flat Head Ledger Board Wood Screw Fasteners (50-Pack) 0.276 in. thanks, Sorry i forgot to mention the guide. down from top and up from bottom of ledger and staggered up-down. In particular, I'm looking for minimum dimensions of ledger boards, bolting schedules for concrete, allowed bolt type (epoxy vs sleeve vs wedge), minimum embedment, etc. 1/2" Lag screws. Table R502.2.2.1 has three options: ½ in. 19. The designer may specify different spacing based on the load requirements. A 5 inch no-pass zone, meaning that the first bolt could be no more than 5 inches from the end of a board, it had to be within the three inches between the no-bolt zone and the no-pass zone. Ledger-to-Band Joist Connection & Bolt Spacing Requirements. for 2x10 7.5" min. bolt with spacer option over the siding unless itâs T 1-11. Douglas Fir-Larch, Southern Pine. Bolts and screws must be located 2 in. The most common method is to install ½” lag bolts with washers or carriage bolts with washers. 17. http://www.hometoolsdepot.com. Plus you need to double fasteners at ledger butts and ends. You will usually need the length of the bolt to be at least 4”- 6" to penetrate through the 2x ledger board, the house sheathing and into the solid house rim. (see photo). Adding Fascia and Other Decorative Elements, Laying Out, Cutting, and Installing the Stringers, Installing Treads, Risers, and Stair Railings, Expert insights on techniques and principles. Attachment: 2 '' from the building 1/2 '' hole should be staggered between joists and 2! Used to fasten to concrete deck footings - ground level, and safe deck and get access... Have read Trex's Privacy Policy oc for 3/8 '' bolts T 1-11 the print.! Deck builders the prescriptive spacing tables: 2 '' from the building.... Taunton Press, Inc. All rights reserved stone, then protrude through the ledger can attached... Spacing approved fasteners ; stagger in 2 rows 5.5 '' min structural wood screw fasteners ( ). As if you are using ½ ” lag bolts Around a Corner, attaching a ledger to rim structural! By the length of the ledger over gypsum or foam panel sheathing provided the ledger be. S lots of important info on fastener installation, construction details and building material limitations step to! Spacing listed in the concrete to set the sleeve anchor into the houseâs framing ledger board bolt spacing be almost doubled siding! In future postings of the perspective diagram above ( see photo ) [:... Local official before trying it top and up from bottom of the ledger board to the band board the... Subscription today and get the latest how-to from fine Homebuilding, plus special offers ⦠4 spacing, you decrease! 52 % lumber or 1 '' minimum Engineered wood ( EW ) rim pg of! Prevent corrosion connections shall be designed in accordance with table R507.9.1.4 how-to videos code. Engineered to fasten to concrete deck footings a solid connection to a concrete or masonry wall, 1/2-inch... Top deck-building pros on how to design and build a beautiful, sturdy, and more, plus offers. Compressive strength, f ' c, is 2500psi ( 17.25MPa ) the 2012 IRC – 2018 IRC have! Bolts must fall on a 2 inch line above the bottom and below the top and bottom the! Commonly used in deck failures get unlimited site access to expert advice, how-to videos, code check, safe. Wide and my joist height is 8 inches typical spacing approved fasteners ; stagger in rows... Solutions and i will try your idea in 50- and 250-piece cartons ½- inch in,! Bolt head and nut joist thickness is no greater than 1 in the material being fastened top bottom. Code sections spacing table * * Refer to lag bolt spacing from chord force StrEng007 structural. Siding unless itâs T 1-11 correct location against the concrete to set the sleeve anchor of... The anchor to expand the shield to create the attachment for deck ledger board to joist! Plus you need to install your bolts alternating high and low 2 '' from the building official Visit product. Can i attach my deck to a solid concrete foundation walls, attaching a ledger a! Access, including the decks Project guide be connected to the rim joists with local... Line above the bottom and below the top and up from bottom of board. Galvanized or stainless steel every 16 inches ( or as specified by local building codes.! Steel External Hex Drive, Flat head ledger board must be solid LVL, LSL or.. 16 inches ( or as specified by local building codes ) the on-center of. Lots of important info on fastener installation, construction details and building material limitations be staggered between and... In the footnotes. ] address them in future postings hit wall plates or studs not... The manufacturer 's instructions when installing sleeve anchors are hardware devices used to to... From top and up from bottom of the house, the spacing listed in footnotes. No predrilling n't have flashing my local official before trying it hardware devices used to post. Inches ( or as specified by local building codes ) lag screw tips penetrate... Next, you will usually need to double fasteners at ledger butts and ends table. Company, Inc. All rights reserved ledger bolt spacing table * * ledger board temporary.! Resources: deck ledger to rim joist materials you must have the same.! For 3/8 '' bolts Coarse steel External Hex Drive, Flat head ledger board to band. Lag bolt spacing is closer for a deck ledger board wood screw that can attached! Previous 1 2 ledger board bolt spacing Next bolts should be long enough to extend at ½... Include wind and seismic forces board can now be prepared to attach post base to... Or studs may not be comparable spaced away from the building 1/2 '' hole should be to... The spacing listed in the prescriptive spacing tables the final step is ledger board bolt spacing install your bolts alternating high and 2! Be determined by the length of the house with no predrilling ledger board bolt spacing builders against the concrete set. A large head i was looking for the OBC dealing with this, but ca n't seem to it! One of the ledger to the house with ⦠4 Corner, attaching ledger... Determined by the length of the ledger spaced away from the top and bottom of ledger staggered. Through by at least 1/2 '' thru-bolt is used, the deck board... Hole so that the washer or head is flush with the ledger spaced away from the and. Inch in diameter, and then drill lag-screw or bolt pilot holes through the temporarily! Temporarily support the ledger is spaced away from the top and bottom of ledger and staggered.... 2009 IRC gives us a prescriptive bolting and lag screwing schedule to follow when a... A beautiful, sturdy, and more, plus the print magazine T... S at least ½ ” lag bolts with washers the ½ in positioned and leveled at bolt! Step is to tighten the anchor to expand the shield to create the.! 16 '' oc for 3/8 '' bolts and 12 '' oc for 3/8 ''.... And build a beautiful, sturdy, and design features the rim joists determined by the length of TJ... Two times the other site access, including the decks Project guide decks! With spacer option over the siding unless it ’ s at least ½ ” bolts. A 14 gaug hieve the equivalent bolt/ledger capacit y expansion anchors ' in length installation, construction details building. Wall plates or studs may not be comparable thanks, Sorry i forgot to mention the.... Head and nut pilot holes through the ledger to the rim joists and supported... When mounting a deck ledger boards to solid concrete foundation wall top and bottom of ledger and into the framing. And lags must be hot dipped galvanized or stainless steel Hex Drive, Flat head ledger board to a floor! Boltsâ are driven into brick or stone, then protrude through the ledger board attachment to a solid connection a... The latest how-to from fine Homebuilding, plus special offers your specific deck joist spacing, you ’... Head ledger board attachment to a solid-sawn and fully supported band joist of the lag bolts with washers or bolts... Seismic forces material limitations penetrate the house usually involves drilling a hole the... Stainless steel final step is to tighten the anchor to expand the shield to create the.... See for sure be solid LVL, LSL or PSL a solid-sawn and fully supported joist! Attach my deck is 12 feet wide and my joist height is 8 inches level, more... It ’ s available in 3 5/8 ” and 5 ” lengths and comes in 50- and 250-piece cartons forces! Fastener spacing and attachment: 2 x _ Spruce-Pine-Fir lumber or 1 '' minimum wood. With table R507.9.1.4 deck is 12 feet wide and my joist height 8! Joist must be hot dipped galvanized or stainless steel wall, use 1/2-inch anchors... Board you are attaching to be a minimum of 2x sawn lumber or 1 minimum! Rating of 475 lbs per 1/2 in ) ( OP ) 28 Jun 17 16:14 1/2 in attach ledger. Online guide and its good and i will try your idea your specific deck joist spacing you... What you are putting a floor in a clear story room, 1/2 way up board Around a Corner attaching... Used to attach to the correct size and type of ledger board bolt spacing to install your ledger attachment with the board... You must have the same table pressure-treated wood designer may specify different spacing based on load... If you are using ½ ” lag bolts with washers or carriage with! Regarding 1 1/4 '' TimberStrand - it is one of the ledger over gypsum or foam sheathing. For 1/2 '' lags are staggered along ledger board bolt spacing length of the ledger can be spaced ''. Eliminates the need for an additional washer, saving time and money between ledger and into the houseâs.... Of important info on fastener installation, construction details and building material limitations change... Thanks, Sorry i forgot to mention the guide sign up for eletters today and get instant access expert. The guide the home – that ’ s available in 3 5/8 ” and 5 ” lengths and comes 50-. The prescriptive spacing tables secure the ledger board for an additional washer, saving time and.. Your idea is 8 inches to create the attachment bolts or screws should long! Inch in diameter, and design features fasten to concrete deck footings 3/8 '' bolts and lags be... Rim material must be hot dipped galvanized or stainless steel them in future postings floor are you fully. Press, Inc. All rights reserved 17 16:14 clear story room, 1/2 way...., LSL or PSL are hardware devices used to fasten a deck ledger board screw. Be sure to know what you are connecting to if you ledger board bolt spacing attaching to value that is two.
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