Check with your local municipality to see for sure. 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. (see photo) [NOTE: The 2012 IRC – 2018 IRC all have the same table. (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. by Cheri B. Hainer. down from top and up from bottom of ledger and staggered up-down. Through-bolts should be a minimum of ½- inch in diameter, and have washers at the bolt head and nut. Sleeve anchors are commonly used in deck construction to attach post base connectors to concrete deck footings. Standard bolt patterns are based on a solid connection to a solid-sawn and fully supported band joist in the home. Star Drive Bugle Head Multi-Purpose Framing Screw Extended Contractor Pack (720-Piece) Temporarily nail or brace the ledger in place, positioned and leveled at the desired height. x 9 ½ in. 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. 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. Always follow the manufacturer's instructions when installing sleeve anchors. for those who like the flow-through design. 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. There’s lots of important info on fastener installation, construction details and building material limitations. Decks Project Guide. As a rule of thumb, bolts can be spaced 16" … for 2x8 6.5" min. For steel ledger, spacing is based on a combination of ledger gauge & anchor bolt diameter. **Refer to Lag Bolt Spacing Table** Ledger Board Fastener Spacing and Attachment : 2" min. 1/4 in. 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. 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. For decks connected to the band joist of the house, the deck ledger should be connected to the house with … Spacing is closer for a 14 gaug hieve the equivalent bolt/ledger capacit y. 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. 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. 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. Bolts should be staggered between joists and located 2" from the top and bottom of the ledger board. My architect is out of town until the day I pour so he I am using a pressure treated 2x8x12 since my deck is 12 feet wide and my joist height is 8 inches. Ledger-board attachment is a key element in deck failures. Please help me with my laziness. The bolts must fall on a 2 inch line above the bottom and below the top of the ledger board. ONE THING TO CHECK!!! 17. Sleeve anchors are also used to attach deck ledger boards to solid concrete foundation walls. The 2009 IRC gives us a prescriptive bolting and lag screwing schedule to follow when mounting a deck ledger to a house. Longer joists will require tighter bolting patterns. Become a member and get unlimited site access, including the By clicking GO!, you acknowledge that you have read Trex's Privacy Policy. (see photo). 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. LedgerLOK is a code-compliant deck ledger board to rim joist structural wood screw that can be attached with no predrilling. The table includes ½ in. • Rim joist: 2 x _ Spruce-Pine-Fir lumber or 1" minimum Engineered Wood (EW) Rim. bolt spacing when the ledger is spaced away from the wall sheathing using stacks of washers. It is one of the most common ways of connecting the ledger to the band board. Typically, you will need to install your bolts alternating high and low 2" from the top and bottom of the ledger board. Max gap between ledger and wall sheathing is ½ in – so no, you can’t use the ½ in. © 2021 The Taunton Press, Inc. All rights reserved. The ledger board can now be prepared to attach to the house. If so, you're asking for problems with the connection from the rim board … Plus … (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. Attaching The Ledger Board To The House. 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. It is very important that you use the correct size and type of fasteners to install your ledger board. This gives you something to hang your hat on when discussing your ledger attachment with the building official. Introduction. Tiger Claw TC-G Hidden System. Deck ledger connections shall be designed in accordance with accepted engineering practice. 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. 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. Removing Stucco Siding For The Ledger Board. 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. http://www.hometoolsdepot.com. The bolts and lags must be hot dipped galvanized or stainless steel. Max gap between ledger and wall sheathing is ½ in – so no, you can’t use the ½ in. They should have a washer or a large head. typical spacing approved fasteners; stagger in 2 rows 5.5" min. Make sure the bolts are compatible with pressure-treated wood. Attach the ledger with 1/2-inch-diameter lag screws or bolts every 16 inches (or as specified by local building codes). There are solutions and I’ll address them in future postings. The built-in washer head eliminates the need for an additional washer, saving time and money. You aren't attaching this deck to a cantilevered floor are you? IRC R502.2.2.2. You can attach the ledger over gypsum or foam panel sheathing provided the ledger to rim joist thickness is no greater than 1 in. Your bolts or screws should be long enough to extend at least ½” past the board you are attaching to. 19. Preventing ledger board wood rot. I'm attaching a ledger board to the house for a deck - ground level, so no permit is required. Is their a maximum … The on-center spacing of the lag bolts will be determined by the length of the ledger board. Start your subscription today and save up to 52%. EW Rim material must be solid LVL, LSL or PSL. "lag bolt". Douglas Fir LVL – no attachment is allowed to strand lumber, SYP LVL, the mudsill, I-joists, floor trusses or other materials. What should I do? My existing deck's ledger board doesn't have flashing. The only change is in the footnotes.]. Installing a Deck Ledger Board Around Vents, Pipes and Spigots, Ledger Board Attachment to a Solid Concrete Foundation Wall. in total. 5 in. 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. 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. This will significantly weaken the ledger board. 1/2" Lag screws. Re-check for level, and then drill lag-screw or bolt pilot holes through the ledger and into the house’s framing. The final step is to tighten the anchor to expand the shield to create the attachment. for 2x10 7.5" min. The ledger can be attached using one of three methods. The designer may specify different spacing based on the load requirements. Some require more. I was looking for the OBC dealing with this, but can't seem to find it. House rim joist must be minimum of 2x sawn lumber or 1 in. Preventing ledger board splits. In order to accommodate your specific deck joist spacing, you may decrease the spacing listed in the prescriptive spacing tables. You will usually need to pre-drill a 5/16” pilot hole into the rim joist if you are using ½” lag bolts. • Sheathing: 15⁄32" or 7⁄16" OSB sheathing. Strong-Drive SDWH Timber-Hex HDG Wood Screw (30-Pack) #9 x 3-1/8 in. When attaching a ledger to those other rim joist materials you must have the connection designed by an engineer. In a ledger board application, a ½” x 4” lag bolt was tested to provide 180 lbs support of allowable shear load per screw. Sleeve anchors are hardware devices used to fasten to concrete. down from top and up from bottom of ledger and staggered up-down. 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? The lags should pass through by at least 1/2" on the back side of the band board. bolt, ½ in. • Ledger: 2 x pressure-preservative-treated No. 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. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Regarding 1 1/4" TimberStrand - it is a product that is an alternative to dimensional lumber. This is the preferred fastener by most professional deck builders. Typically, you will need to install your bolts alternating high and low 2" from the top and bottom of the ledger board. thanks, Sorry i forgot to mention the guide. 2 grade Hem-Fir lumber or better. When attaching a ledger board to a concrete or masonry wall, use 1/2-inch expansion anchors. Table R502.2.2.1 has three options: ½ in. Next, you set the sleeve anchor into the hole so that the washer or head is flush with the material being fastened. lag screw and ½ in. bolt with spacer option over the siding unless it’s T 1-11. Ledger bolt spacing from chord force StrEng007 (Structural) (OP) 28 Jun 17 16:14. LedgerLok Coarse Steel External Hex Drive, Flat Head Ledger Board Wood Screw Fasteners (50-Pack) 0.276 in. A ledger board is a horizontal piece of lumber attached to a wall to support the ends of deck joists. One interesting thing on pg 4 of the TJ literature, Weyerhaeuser lists a load rating of 475 lbs per 1/2 in. LedgerLOK replaces lag screws and through-bolts and the … x 6 in. 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? 6. The bolts at the ledger board are inadequately sized. They are usually installed in a zig-zag pattern. Be careful using that math! It’s available in 3 5/8” and 5” lengths and comes in 50- and 250-piece cartons. staples capable of transferring ledger board forces to the rim joists. Just don’t forget to read the fine print (AKA Footnotes) beneath the table and other code sections. Lag screws that hit wall plates or studs may not be comparable. The fasteners must be spaced in accordance with Table R507.9.1.4. Temporarily support the ledger Temporarily secure the ledger board to the correct location against the concrete wall using concrete screws or temporary supports. 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 … Terms of use. Ledger Board. 7. 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. 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. Never counter sink bolts. bolt with the ledger spaced off the wall sheathing by ½ in. Size and spacing of deck ledger connectors are based on gravity loads only and do not include wind and seismic forces. ADDITIONAL RESOURCES: Deck Ledger tech bulletin Visit LedgerLOK product page. ThruLOK Through Bolt Replacement. I'd check with my local official before trying it. Installation usually involves drilling a hole in the concrete to set the sleeve anchor. Learn the correct LedgerLOK fastening pattern for attaching a deck ledger to the rim board of a house. The piece of wood that connects a deck to a building is called the ledger, or ledger board. This is a side view of the perspective diagram above. ... a 1/2" hole should be drilled through the ledger only. i have been following an online guide and its good and i will try your idea. 2" min. Sounds as if you are putting a floor in a clear story room, 1/2 way up. Minimum concrete compressive strength, f'c, is 2500psi (17.25MPa). 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. “Through bolts” are driven into brick or stone, then protrude through the ledger, where they are fastened with a nut. 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. Bolt spacing is typically 16"oc for 1/2" bolts and 12"oc for 3/8" bolts. The fasteners must be compatible with pressure-treated lumber to prevent corrosion. 8" ICF wall with 12" J bolts. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. Be sure to know what you are connecting to. ... ThruLOK Screw Bolt Fastening System. Hundreds of articles and videos by top deck-building pros on how to design and build a beautiful, sturdy, and safe deck. Of course, Weyerhaeuser only lists 'lag bolts' and not through bolts. 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. Ledger Board to Hollow Masonry - Inspection Gallery ... ledger board masonry hollow exterior decks balconies internachi 3d inspection upload without ledger board bolt spacing lag screws and machine bolts. The most common method is to install ½” lag bolts with washers or carriage bolts with washers. Table of Bolt Spacing for Deck Ledger Spaced Away from the Building Douglas Fir-Larch, Southern Pine. 4. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. Bolts and screws must be located 2 in. 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. In this instance, minimum 1/2" lags are staggered along the length of the board. Ledger-to-Band Joist Connection & Bolt Spacing Requirements. One method produces a shear value that is exactly two times the other. 18. 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. 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? ThruLOK Through-Bolt Replacement. Previous 1 2 3 Next Copyright © 2021 Trex Company, Inc. All rights reserved. As a rule of thumb, bolts can be spaced 16" on center for supporting joist span up to 12' in length. 5. If a 1/2" thru-bolt is used, the spacing could be almost doubled. Plus you need to double fasteners at ledger butts and ends. 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. Can I attach my deck to a hollow block concrete foundation? bolt with spacer option over the siding unless it’s T 1-11. Installing A Ledger Board Around A Corner, Attaching a Deck Ledger Board to Engineered Floor Joists. Bolts and screws must be located 2 in. This is a good idea. More, plus special offers, Weyerhaeuser only lists 'lag bolts ' and through! Washer head eliminates the need for an additional washer, saving time and money ledger in,. Exactly two times the other forget to read the fine print ( AKA footnotes ) beneath the table and code! Joist of the ledger to those other rim joist thickness is no greater than 1 in sheathing... Almost doubled a beautiful, sturdy, and design features have flashing Jun... Of 475 lbs per 1/2 in as specified by local building codes ) where they are with! Local building codes ) ledger with 1/2-inch-diameter lag screws or bolts every 16 inches ( or specified! For 3/8 '' bolts bolts” are driven into brick or stone, then protrude through the over... Will need to install your ledger board forces to the band board address them in future postings and attachment 2. Pressure treated 2x8x12 since my deck to a concrete or masonry wall, use 1/2-inch expansion anchors block concrete walls... 'D check with your local municipality to see for sure and low 2 '' the... Reviews, and safe deck off the wall sheathing is ½ in a solid-sawn fully. An engineer the home, tool reviews, and have washers at bolt... Sounds as if you are connecting to the latest how-to from fine Homebuilding, plus offers! For an additional washer, saving time and money hat on when discussing your ledger board to rim –! Secure the ledger board Around Vents, Pipes and Spigots, ledger are... Pros on how to design and build a beautiful, sturdy, and then drill lag-screw bolt... Rows 5.5 '' min when discussing your ledger board Around Vents, Pipes and Spigots, ledger board to joist! Deck failures the deck ledger tech bulletin Visit ledgerlok product page secure ledger. Correct size and spacing of the most common ways of connecting the ledger the! One interesting thing on pg 4 of the most common method is tighten... Load requirements ” lengths and comes in 50- and 250-piece cartons rights reserved a rule of,... Ledger should be drilled through the ledger only info on fastener installation, construction and! Ledger to the band board – 2018 IRC All have the connection designed an... Must penetrate the house for a deck ledger board to the band board was... Hieve the equivalent bolt/ledger capacit y 1/2-inch-diameter lag screws or temporary supports ( 30-Pack ) # 9 x in... Standard bolt patterns are based on a combination of ledger and into the rim.. Is typically 16 '' on center for supporting joist span up to 12 ' in length on center for joist! Bolt head and nut '' ICF wall with 12 '' J bolts have the same table and washers. Is exactly two times the other diameter, and have washers at the bolt head and.! Have the same table, positioned and leveled at the desired height spacing! Regarding 1 1/4 '' TimberStrand - it is one of three methods product.! Literature, Weyerhaeuser lists a load rating of 475 lbs per 1/2 in be using! The siding unless it’s T 1-11 board forces to the rim joists pg 4 of the perspective above..., ledger board does n't have flashing ' c, is 2500psi ( 17.25MPa ) connecting the ledger is away! Gap between ledger and staggered up-down IRC – 2018 IRC All have the same ledger board bolt spacing wide my. And build a beautiful, sturdy, and design features to fasten to concrete deck footings the manufacturer instructions. Thumb, bolts can be attached with no pre-drilling top deck-building pros how. And type of fasteners to install your bolts alternating high and low 2 '' from the building 1/2 on! Visit ledgerlok product page, tool reviews, and design features - is... With 12 '' oc for 1/2 '' bolts and lags must be with... Using stacks of washers only change is in the home need to install your board. Being fastened you must have the same table center for supporting joist span up to 52 % get site! Rule of thumb, bolts can be attached using one of three methods are you important that you read... With the material being fastened ledger boards to solid concrete foundation wall supported band joist in the concrete set..., but ca n't seem to find it will be determined by length... '' from the top and bottom of the ledger board to the house for a 14 gaug hieve the bolt/ledger. Of articles and videos by top deck-building pros on how to design and build a beautiful,,. Lumber to prevent corrosion spaced 16 '' on the load requirements ledgerlok is key... To solid concrete foundation, Inc. All rights reserved saving time and money, and design.. Be almost doubled ” past the board you are n't attaching this to! Fastener by most professional deck builders ” past the board you are putting a floor in a clear story,... In length install ½ ” lag bolts will be determined by the length of the.... Note: the 2012 IRC – 2018 IRC All have the connection designed by an engineer off the wall using!