Mar 30, 2007 · Bridging never hurts (except for getting in the way of mechanicals). c. Sistered Joists: Depending on the existing attic structure, a contractor might be able to Nov 1, 1996 · The blocking or bridging between joists (or rafters) also contributes to this phenomenon. Floor joists must support the weight of the floor and whatever is on it. Bridging involves the use of small dimension lumber,(often 1”x material) to install angle braces between the joists to resist this movement. 2021 code: Joists exceeding a nominal 2 inches by 12 inches (51 mm by 305 mm) shall be supported laterally by solid blocking, diagonal bridging (wood or metal), or a continuous 1-inch by 3-inch (25 mm by 76 mm) strip nailed across the bottom of joists perpendicular to joists at intervals not exceeding the steel joist and welding it to an angle anchored to the concrete masonry wythe (Figure 3 and Figure 4). 757(d)(2)] over 100 feet through 144 feet Jan 14, 2005 · Some decking materials installed at a 45-degree angle to the run of the joists require the joist spacing to be 12 inches on center. h. Apr 8, 2018 · Geometry of Joist Bridging. FROM BRIDGING. Designed for secure grip before they drive-home blow and deeper prong penetration. If you are replacing floor joists, it is important to size them correctly. com fo Steel tonnage totals are as follows: Roof Joists = 1,227 tons; joist girders = 2,668 tons; wall joist = 1,045 tons; and joist bridging = 540 tons. vulcraft For TJI® 360 and 560 joists, use one 8d (0. 7. Katz™ Bridging Bar. Standards & Specifications. If bridging is intended to brace other components of the structure the size and connections must be indicated on the contract documents. Set a hydraulic jack and post under the beam, and jack up the joists about 1/8 in. Mike installs galvanized steel briding in between the floor joists on this bedroom addition project in Rocky Hill CT. Bridging, on the other hand, is when the blocks are attached to all the inner joists on all sides. Bridging theory. Bracing between roof trusses and between longer-length solid wood floor joists as well as between I-joists is required to improve roof or floor structural stiffness and also to keep framing members spaced at proper intervals. EasyClip™ Quick Twist Web Stiffener. It can be installed after subfloor is in place. $2199. Anything over 18 feet would require 4x4 or 6x6 posts mid Le Grand Chantier RONA. The Steel Network’s light steel framing bridging connectors and members will accommodate almost any stud spacing on a cold formed steel framing job. 20ga, galvanized finish, 15-1/4 Nov 14, 2013 · 14248 posts · Joined 2009. (c) fastened at each end to a sill or header. TradeReady® steel joists are one of the primary components that make up the TradeReady® floor system. Green, Technical Director, 3127 Mr. 1 m from each support or other rows of strapping, and. A key benefit to using OPEN JOIST is the ability to enhance floor system performance through the installation of “strongback” bridging in OPEN JOIST floor systems. The Steel Joist Institute provides resources to construction professionals to assist them in designing and building with steel joists and joist girders. This part of the webinar will focus on the bridging systems that laterally brace steel joists. If you look at typical wood floor framing, you will often see rows of cross-bridging between the floor joists. Size of floor joists (2×10 or 2×12 Standard Lumber 16″ on Center) 2. The Benefits of Using Steel Joists and Open-Web Steel Joists. It also helps make sure concentrated loads are shared between multiple joists. For other grades, loading conditions and on-center spacings, refer to Maximum Spans for Southern Pine Joists & Rafters published by the Southern Forest Products Association. How many spaces will you install bridging 5. FREE delivery Sat, Mar 23 on $35 of items shipped by Amazon. Examine the joist-supporting beams and posts. The OSHA Standards strictly prohibit placing construction loads on un-bridged joists and give the proper proce-dure for lan. It is the responsibility of the purchaser to ensure that any joists (and bridging) purchased will be selected, erected and used properly. List Grid. Joists exceeding a nominal 2 inches by 12 inches (51 mm by 305 mm) shall be supported laterally by solid blocking, diagonal bridging (wood or metal), or a continuous 1-inch by 3-inch (25 mm by 76 mm) strip nailed across the bottom of joists perpendicular to joists at intervals not exceeding 8 feet (2438 mm). Align the extended bridging angles with the horizontal steel joist to prevent crimping in the steel cords due to wind pressure. High-strength steel efficiency. Size: 2" x 10". Coped flanges for easy installation. Made from 22-gauge steel. The result is the most effective and least Vulcraft's CJ-Series Joists are designed to provide optimal strength and versatility in various construction projects. K SERIES OPEN WEB STEEL JOISTS. Ends of LH- and DLH-Series Joists resting on steel bear-ing plates on masonry or structural concrete shall be attached thereto with a minimum of two 1/4 inch (6 mil-limeters) fillet welds 2 inches (51 millimeters) long, or with two 3/4 inch (19 millimeters) ASTM A307 bolts (min-imum), or the equivalent. This is because unlike solid blocking, metal floor joist bridging doesn’t get much in the way of your wiring and plumbing. Applied loads for each table are given in pounds per square foot (psf). From steel joists and joist girders to steel roof deck and long-span composite floor systems, we engineer and manufacture solutions that control costs, enhance performance and ensure project success. LTB works only in tension, so must be used in cross pairs. Suggested Spans. Aug 16, 2021 · (1) SEE TABLE 2. May be installed before or after sheathing, from the top or bottom. 5" / 16" = 7. ws INTRODUCTION Bridging is an integral component of the open-web steel R502. 40625. The cross bridges, typically a pair of wooden members, form an 'X' shape. Joist bridging is used in construction with long-span lumber as a load-sharing device. Seek hanger manufacturer’s guidance if this is the case. Joist bridging should be placed as follows: Span Bridging Required 1. See the below span chart as well as the local codes and guidelines for your jurisdiction. ”. Notches located in the top or bottom of floor joists shall not have a depth exceeding 1 /6 the depth of the joist, shall not have a length exceeding 1/3 the joist depth nor be located in the middle 1/3 of the span of the joist. IRC R502. Floor joist blocking vs bridging; differences & similarities. Calculate unshored construction spans, deck Jun 25, 2023 · Wood bridging block floor framing involves adding small pieces of wood, called bridging or blocking, between floor joists. The reason the bridging is nailed in this manner is because it is easier to nail the bridging to the floor joists. 5, 40. Steel joist bridging plays an important role in the overall strength of a joist system. Staggered nail pattern accommodates 2x8 and 2x10 joists. Install with 6d common nails. Jun 4, 2008 · My old farmhouse's 2nd floor has 1"x12" subfloor decking on top of 2"x 12" joists with 12" centers that squeaked and felt "soft". length - std for horizontal bridging is 20' bot of - indicate bottom of what (ex. Jul 13, 2011 · Some joist designs even take into consideration large islands with granite on them or other such loads like offset bearing walls. Has nail holes in one end for use if a prong is bent during installation. Full-depth joist bridging (sometimes referred to as mid-span blocking) has traditionally been used for long-span dimensional lumber as a load-sharing device. Dec 3, 2020 · As a results, wooden floors where the floor joists are supported using wooden blocks barely ever squeak, as there’s minimal-to-no bouncing. 40625 ≈ 9 floor joists. C. 6, 61 cm) and are paired . w18) top of - indicate top of what (ex. Installed in pairs, this light tension-type bridging keeps joists in place and prevents them from rotating while distributing loads over more than one joist. 757 (e) (1), (2), and (3). Structure Lock brings you the most versatile cross bridging products in the industry. (2) In the shaded range of the Table, for LH23, 24,and 25, compressive strength requirements may control, reducing the maximum joist spacing shown. holtermann@canam. A span of 12 feet would require 2x10's and spans between 14 and 18 feet would require 2x12's. Reinforcing connections are installed between joists to correct the bounce and wobble of a flooring system. The second part is based upon the recently published SJI Technical Digest 2 “Bridging and Bracing of Steel Joists and Joist Girders. Galvanized. We build our products using 18 gauge galvanized steel designed to interlock dimensional joists and engineered I-joists of all sizes and spacing. Visit http://www. An overview of the SJI joist types is followed by design considerations and loading types. In addition to keeping the joists from "rolling", it transfers load from one joist to adjacent joists, spreading the effect of point loads. 3 m), the joists shall be set in tandem with all bridging installed unless an alternative method of erection, which provides equivalent stability to the steel joist, is designed by a qualified person and is included in the site-specific erection plan. Galvanized (G90) for extra corrosion resistance. Download the SJI standard specifications, load and weight tables, and the code of standard practice for K-Series, LH-Series, DLH Series open web steel joists and Joist Girders and CJ-Series composite steel joists. Increased bay dimensions, reducing the number of joists and columns and simplifying building erection. The bridging helps prevent joists from twisting when they're loaded. Jacking them up too fast may cause cracks in the walls and floors overhead. Myrtle Beach, SC 29577, Phone: 843-626-1995, Fax: 843-626-5565, psgreen@steeljoist. Continue installing joists, using your speed square to mark the desired spacing on each joist. I use 1x3 pine with 2" medium crown staples to prevent splitting. We have the expertise to help you determine the optimal structural solution. Eliminates wood blocking and labor-intensive notching of metal framing. The larger the span, the larger the joists. If building joists into masonry, ensure ends are treated with 2 coats or colour-tinted preservative. Approximate length of joist span from outside wall to beam 3. 1 Bridging. Made from 22-Gauge steel. s. This clip will be located 1’-0” off the centerline of the joist towards the tagged end of the joist. Your joist span will depend on the size of the joists (i. 3. vulcraft deck solutions – combined design data sheets. A common mistake, when installing solid bridging, is to offset the bridging, as shown in Figure 5. Jun 4, 2008 · Installed in pairs, this nailless compression bridging keeps joists in place and prevents them from rotating while distributing loads over more than one joist. com. The SJI has made significant changes to the Specification requirements for bridging over the last decade, and conducted new research to confirm and advance the understanding of the role MBG – Grip tooth bridging. Repeat the same process every 4 feet along the joists. Made with quality material, this bridging is a great choice for your next floor Jul 8, 2024 · Subtract the width of your floor joist from your floor's length: 120" − 1. Between the start and end spaces, a repetitive pattern of five (5) spaces of strapping, on the laterally unbraced flange, followed by one space of solid bridging can be used. Floor joist bridging /bracing for bouncy floors in old house - what trade? I live in a 60s timber frame split level with original tassie oak floors. 7-4 FOR MINIMUM JOIST SPACE FOR DIAGONAL ONLY BRIDGING. This method improves the strength and stability of the structure by distributing loads more evenly and preventing joists from twisting or warping. Bridging should be installed between floor joists in both indoor and outdoor applications including decks. 5" = 118. com Simpson Strong-Tie category "Bridging" We use cookies on this site to enhance your user experience. Step 5: Install Bridging. Cross Bridging Wood Floors are used for a range of spacings including 12”, 16”, 24” (30. Examine The Support Beams. STANDARD STEEL JOISTS. 757(c)(3) and (4)] Joists that require erection bridging are specified in Tables A and B [. (1) Except as permitted by Sentence (5), where strapping is specified in Table A-1, it shall be, (a) not less than 19 mm by 64 mm, nailed to the underside of floor joists, (b) located not more than 2. Place. The weight of the piano is centered over a single joist, but the bridging transfers some of the weight to the adjacent joists. The NCA features precision-formed v-shaped prongs, in place of nails, to provide a secure grip before the drive-home blow for deeper prong penetration. color of description sht seq. Steel Joist Institute (SJI) specifications, SJI Code of Standard Practice and Handling and Erection per SJI Technical Digest #9 must be followed. Bridging provides lateral stability during erection and when chords are not fully braced during the application of loads. 9. Length: 19-1/2-in. Apr 16, 2024 · Ensure that the joist holes are less than a third of the joist’s depth. Drive nails at an angle at least 1⁄2" from end. Jun 26, 2020 · A: Joist bridging is the right term for bracing between floor joists, but it doesn’t usually look like what you have. Retrofit I-Joist Made In USA. Resources include publications, design tools Apr 8, 2021 · We’ve put together this quick guide to show you how joist bridging works and whether or not I-I-joists need bridging. Note, however, that most commercially-available metal bridging products are designed to fit floor joists that span 16-inches or 24-inches. Typical: $23. We pulled up a strip of the subfloor every 4' and installed these bridging braces. Products > Interior Framing > Bridging & Bracing. Where steel joists at or near columns span more than 60 feet (18. Solid wood blocking should be equally spaced in rows, with a maximum of 4′ to 6′ apart. Chapters include: Purpose of bridging. INCA nail less installation eliminates callbacks for nail squeaks. We look forward to hearing from you. 5 AND 6. “Since this isn’t a floor, then the allowable deflection tables don’t really apply,” adds Jigs-n-fixtures. Galvanized (G90) for extra corrosion resistance (2) 0. For technical information, including loading capacity information, please refer to For help with bridging size and other requirements, please click on the Joist Bridging Information PDF located here. Either select a larger bridging angle size (outside of the shaded area) or check compression Jun 23, 2024 · The MBG824 Grip-Tooth Bridging 2" X 8", 24" O. 7. spacing. Personally, I prefer X-bridging. For TJI® 560D, use 10d (0. Samples. 2. Floor joist blocking and bridging are methods to solidify a floor structure. If you need to calculate loads, or analyze deck diaphragm shear and stiffness, and more, our Roof Deck Design Tools can help you find the answers you need. Jan 15, 2024 · 2×10. The LTB provides bracing between floor joists as a critical contribution to the structural strength of a floor. Blocking should be installed edge to edge to allow for fastening of the interior blocking. 40. This process involves attaching a new joist alongside an existing joist to increase its strength. It is critical that construction loads on any one Long bridge spans simply need large joists. Simply locate the bend line approximately 1" from the joist edge. The product’s open-web configuration allows installation of this continuous perpendicular bridging through OPEN JOIST trusses. Are joists still in good condition 4. 131" x 3") nails. It is constructed of 22-gauge steel with a G90 galvanizing finish. In cases where the joist hangers used do not provide adequate lateral support, use end bridging to support joists laterally. Use your carpenter's level to ensure that each joist is level and secure. Additionally, view the current ANSI information. Bridging Termination Clip (BTC3,BTC4,BTC6) CC33 3/4" Channel Clip. NOTE: DO NOT WELD BRIDGING TO JOIST WEB MEMBERS. Where floor joists are notched on the ends, the notch shall not exceed ¼ the depth of the joist. With a wide range of joist options that can be custom fabricated to specification, Vulcraft has the right product to help Feb 13, 2023 · Deck blocking specifically attaches wooden blocks to the deck frame’s rim joist and drop beam (if your deck uses a drop beam). When joist bridging is properly installed, a localized load (for example, from a single person walking on the floor) can be effectively transferred to several joists at a time. Bridging is an integral part of any steel joist system and this webinar explores all aspects of bridging from the underlying theory to installation details. On center spacing, joist height, flange width and depth are all specific to your order and fully customizable. Visit the Simpson Strong-Tie Store. ing bridging bundles on un-bridged joists; see 29 CFR 1926. Heating, Ventilation & Cooling Systems. Position the lumber block in between the two floor joists and fasten using 16d nails. Normally these systems are independent of the joist system. Speed and ease of erection. If you need more information or have additional questions, please contact the Simpson Strong-Tie Customer Service team at 800-999-5099. The joist has to be repaired if the wood is soft, and you can probe it with a screwdriver. Feb 15, 2022 · Steel Joist Bridging FAQs Answered. Nailing two 2x4s together will work to span about three joists, unless the sag is under a weight-bearing wall. 5/8" legs. We do not have a similar style tension bridging (nailless) for 24" O. The table below highlights these major differences between these two floor frame reinforcement methods. 5". 757(d)(1)] Erection bridging requirements are defined for joist spans over 60 feet through 100 feet [. Whether you are designing a single or multi-story structure, Vulcraft manufactures a complete range of efficient, cost-effective steel joists that can add value, strength, and style to your structure. Jul 25, 2018 · "The blocking or bridging between joists (or rafters) also contributes to this phenomenon. Completely eliminated the "bouncy" feeling by spreading the load across multiple joists and you walk across the floor. Strapping and Bridging in Tables A-1 and A-2. – when joist top chords are not laterally supported by decking (standing seam roof) • Attachment of the bridging to the joists chord members must: – resist anticipated bracing forces – be in conformance with the Standard Specifications of the relevant joist series – be fillet welds – four point spot/ tack welds are not acceptable 37 designing with vulcraft steel joists, joist girders and steel deck vulcraft bridging guide . Check for rot with a screwdriver. It provides a measure of reinforcement and cuts down on squeaks, too—and it’s is easier to install than blocking. These joists feature large extruded holes that…. Typically, the bridging consists of solid pieces of wood as thick and deep Jun 25, 2023 · Wood cross bridging in floor framing involves the installation of diagonal supports between joists. However, if spacing between the bridging angles is in excess of 6 feet, bridging alone may not ade- 1. Jenny Schultz 0. Get ready for summer! Project type View all installation services. If you are going to build a small bridge that spans perhaps 8 feet or less, I would use 2x8's that are placed 16 inches on center. 18 gauge. 2×12. Or fastest delivery Fri, Mar 22. Tension bridging works only in tension, so must be used in cross pairs. FOR HANDLING AND ERECTION OF K-SERIES OPEN WEB STEEL JOISTS AND SJI TECHNICAL DIGEST NO. FastBridge™ Clip (FB33, FB43 & FB68) Flat Strapping. a. For Bolted X-bridging, a bridging clip will be added to the joists for connecting the bridging. For example, with bridging installed between joists, a piano leg sitting over one 2×10 is actually supported by several. Two-piece construction creates a solid diagonal brace against joist movement. Fasten. 1x7/64 1-1/4x7/64 1-1/2x7/64 1-3/4x7 Apr 21, 2024 · However, being solid wood meant that these joists were subject to grain pattern and moisture induced warping. 1-1/2 x 9-1/4. Use exterior-grade fasteners to fasten through the outside of the joist. Can be installed after subfloor is in place. Deflection is limited to the span in inches divided by 360, 240 or 180 and is based on live load only. Perform A Closer Inspection. Joe White Ave. e. By clicking "I AGREE" below, you are giving your consent for us to set cookies. 6, 61 cm) and Mar 18, 2019 · Tack a beam under the sagging joists. Add 1 to this value and round up the answer to the next whole number: 7. Precut for 16" and 24" o. Sep 25, 2020 · Bridging is usually installed in every joist space, and multiple bridge members are often required. The LTB features a staggered nail pattern to accommodate 2x8 and 2x10 joists Tension-type bridging with maximum nailing flexibility. joist bridging conditions > bridging termination conditions > per bay along this eave r joist bridging plan erection note: identify the joist bridging 'conditions' on this plan for each bay, and refer to the following detail sheets for specific installation and termination guidance. The premier floor joist system for both commercial and residential framing. w24) job name file no. joist must be erected in accordance with o. Drive the nails into each side of the blocking for a sufficient hold. In general those values are in the SJI bridging tables in the specification. Together, let’s build it better. ing. Purchase steel bridging pieces that are made to fit the spaces between your joists, typically 14 1/2 inches long. 99. BlazeFrame® Shield. Jun 4, 2008 · NAILLESS BRIDGING 2X10. Blocking and bridging creates a better weight distribution among all the joists and reduce the pressure on the joist. Save 5% with coupon. Add a layer of oads such as welding machines and leads, hand tools, bridging for adjacent bays, etc. 113-in x 2-in nails per end The purpose of this Technical Digest 2 is to provide the specifying professional a clear understanding of the Steel Joist Institute’s bridging requirements, both historically and as they exist today, and to provide an overview of the research topics related to joist bridging. Sep 3, 2020 · Using this measurement, cut a piece of 2-by-6 or 2-by-8 wood. This technique enhances the floor's structural integrity by distributing load and reducing joist twisting. K-series Joist Maximum Joist Spacing for Horizontal Bridging Bridging Material Size Round Rod Equal Leg Angles Section 1/2" Dia. Click here to view a copy of SJI Specifications Apr 5, 2023 · Wood Framing Blocking, Bridging, Cross-Bracing, Strongbacks. Bridging is essential in ensuring that your joists stay level and secure over If under 2x12 then bridging isn't required. Divide that difference by the sum of the on-center spacing of the floor joists: 118. SimplyAdditions. paint gray/none location vulcraft - bridging ref drawn checked notes mark qty description size length bot of top of space notes a g c b h d e f base length (bl) overall No, the NCA2x8-16 are designed for 2x8 joists 16" on-center spacing. Features special teeth which grip joists and provide easy single-nail installation. The maximum load for a floor joist depends on spacing, the lumber grade, and the house’s location. Use just two of the six nail holes at each end. org Tim Holtermann, Corporate Engineering Manager, Canam Steel Corporation, Washington, MO 63090 tim. Dec 4, 2020 · Therefore, for floor joists that are centered 12-inches apart, you’ll want to install bridging at the four-inch and eight-inch mark. The sag could be reduced or eliminated by installing king posts, or Leom could sister 2x8s to the 2×6 joists to “roughly triple” the load-bearing capacity of the ceiling. Kathy. Tension-type bridging with maximum nailing flexibility. Our braces are fast, easy and simple to install adding value to your new build or renovation. 13⁄4" minimum bearing at end support. In fact, the wider the floor joist, the greater the chances the joist will twist. DO NOT HANG ANY MECHANICAL, ELECTRICAL, ETC. Clip Express Sales at 866-638-1908 or clipexpress@clarkdietrich. 1 requires blocking for joists longer than 12 You could use larger joists (height), denser wood (species), or closer joist spacing, or you could add bridge blocking within the span to reduce midspan joist rotation. Structure Lock supplies steel braces that are stronger, safer and seismically superior to wood cross bridging or blocking. 2X8 vs 2x10 vs 2X12). Used in both interior and exterior applications, TSN’s line of bridging Oct 3, 2023 · October 3, 2023. Bridging of Open-Web Steel Joists and Joist Girders Authors: Perry S. Note: Structural blocking is not required if sheathing is applied to the joists top and bottom. A floor with bridging is also little less bouncy when Oct 27, 2023 · When builders need to increase the load-bearing capacity of floor joists, they often use a process known as “sistering. 2 Pairs Split Joist Hanger Structural-Connectors Face Mount, for All x 10" Face Mount Joist Hanger 16 Gauge, Hot Dip Galvanized Finish Steel Joist Dimensional Hangers. Once you've installed all of your joists, it's time to install bridging. a day until they’re level. These joists, also known as Composite Joists, combine the efficiency of a steel open web system with the benefits of concrete slab construction. 1. #2 · Nov 14, 2013. Provide stability and rigidity between joist with this wood bridging. Our bridging products are engineered and manufactured to resist weak axis buckling and torsional rotation of members. Commercial Strapping. 1-1/2 x 11-1/4. 5. features special teeth which grip joists and provide easy single-nail installation. “They are mostly there to keep people walking on the Using joist hangers which provide lateral support. Low self-weight of roof and floor construction allowing for smaller columns and foundations than for a concrete structure. Once the first piece is in place the next pieces are nailed on an angle through the floor joist and into the solid bridging. Your full shipping address IMPORTANT: Please note our bridging is not designed for engineered I-Joists, or 2″x8″ standard Mar 13, 2018 · Nailing first piece of solid bridging. ACCESSORIES AND DETAILS. Caution: In order to prevent joist rolling, the TradyReady® Structural blocking must be tied into the structure or otherwise braced against lateral movement. In alberta either they dont or certain codes do not exist that force framers to put strapping or bridging underneath the floor system where as other juristictions require it possibly due to siesmic factors. This restores the structural integrity of the flooring system, providing a long-term solution with minimal disruption and Our Joist Design Tools can help you find the most economical joist depths, perform shear and moment comparisons, analyze vibration, and much more. Bridging is only designed for the lateral stability forces in the joists. Cross Bridging Products for Wood Frame Construction. MB16 – Snap-on, no-nail bridging can be placed in existing floor systems where joist movement is suspected. Two nails should be applied on an angle through the second floor joist and into the end of the solid bridging. Install bridging tightly; loose installation may allow floor movement. 40625 + 1 = 8. They literally build a ‘bridge’ of some sort across your deck by connecting all the inner joists together. 113" x 21⁄2") nail each side. Dec 4, 2020 · For new bridging, install the rows at one-third intervals, depending on the length of your floor joists. May 29, 2024 · Steel bridging (below) doesn’t add as much strength as blocking, but it does prevent joists from twisting. But let’s say you have a 2×10 joist that’s slightly overspanned; its primary failure is excessive deflection, and the usual reason for that is it wants to flop over midspan. Katz blocks are secured to the floor joists or roof trusses with screws or nails. $13571. However, conflicts are common when locating bridging on drawings, in the field, and Only a certain number of employees are allowed on joists until bridging is installed and anchored [. One on each side top and bottom. Meanwhile, we’d recommend metal floor joist bridging over wood blocking for longer floor joists. HORIZONTAL BRIDGING SEE SJI SPECIFICATION 5. Space. This is especially helpful in removing "bounce", or when there may be a large static load such as a tub. In addition, joist bridging should start and end with two (2) spaces of solid bridging. Block Bridging Wood Floors are used for a range of spacings including 12”, 16”, 24” (30. Blocking is fine too, but I like the fact that x bridging is unaffected by cupped joists, is much easier to get a tight connection and it actually tightens up as joists shrink. 31⁄2" minimum intermediate bearing; 51⁄4" may be required for maximum capacity. The kitchen has bouncy and squeaky floors, to the extent that I walk lightly while in the kitchen as I hate feeling things shake. Reinforcing connections are installed between joists to correct the bounce and. hz gz yq ju hk xl ug sc mj le