Design Shear Strength  Approx. Simpson Strong-Tie Strong-Drive structural screws may be designed at reduced shear capacities when installed at closer connection geometries than those listed in the evaluation reports. Sawn lumber rim board shall be spruce-pine-fir, hem-fir, Douglas fir–larch, or southern pine species. The table above also provides SDWS screw spacing for a wide range of materials commonly used for rim board, and an alternate loading condition as required by some jurisdictions. Structural sheathing between the ledger and rim board shall be a maximum of 1/2" thick and fastened per code. Habitat for Humanity We've donated more than $2.5 million to support safe, strong, affordable housing. Designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag screws. This means as forces are pushed against the sides of a nail, the nail can bend slightly to accommodate these pressures. F = allowable withdrawal load or force - lb per inch of penetration (lb/in). Allowable withdrawal load or force of a common wood screw into side grain perpendicular to the fibers of seasoned dry wood can be expressed as. The longer the screw, the better it will hold the surfaces being joined into a unit. Assigned specific gravity SDWS Timber Screw — Allowable Shear Loads — Spruce-Pine-Fir and Hem-Fir Lumber. Un système de connexion complet pour la construction de terrasses. Copyright © 2018 Simpson Strong-Tie Company Inc. A catalog including new product information as well as any applicable specification and installation instructions for Simpson Strong-Tie® fasteners and Quik Drive® systems. Allowable loads are shown at the wood load duration factor of C. Minimum fastener spacing requirements to achieve table loads: 6" end distance, 1 7/16" edge distance, 5/8" between staggered rows of fasteners, 4" between non-staggered rows of fasteners and 8" between fasteners in a row. For ledger-to-rim attachment with 1/2" gap, see. Simpson Strong-Tie has evaluated Strong-Drive SDWS Timber Screws (SDWS22400DB and SDWS22600DB) for use in cross-laminated timber (CLT) diaphragm single-surface splines. By clicking "I AGREE" below, you are giving your consent for us to set cookies. 4. 2009/2012 IRC Compliant Spacing for a Sawn Lumber Deck Ledger to Band Joist with 100 PSF Live Load and 10 PSF Dead Load. The Strong-Drive SDW EWP-Ply screw is a high-strength structural screw specifically designed for fastening multi-ply wood members, such as engineered wood products and solid sawn lumber. What Is the Shear Strength of a Deck Screw? Lag Screw Alternative Structural Fasteners SDS, SDWS and SDWH. See additional Load Tables, Technical Data and Installation Instructions for the Strong-Drive® SDWS Timber screw. Finely threaded screws are actually much stronger. A thread forming screw having a gimlet point, and a sharp crested, coarse pitch thread. Un catálogo con proyectos prácticos y atractivos DIY para el hogar y el patio que utilizan conectores y sujetadores Simpson Strong-Tie® y accesorios Outdoor Accents®. Canadian Factored Lateral Resistances — Strong-Drive® Screws Used for CLT Diaphragms. Sole or Top Plate to Rim/Blocking using SDWS and SDWH Screw. Cut thread screws: Aprox. A tearpad showing deck connections on one side and patio cover system connections on the other. A two-page tear pad including updated features and benefits of the Strong-Drive® SDWS Timber and SDWH Timber-Hex screws. A technical bulletin providing information on how guard posts, rails and balusters are installed using fasteners. Alternate Fasteners for Connection Details in AWC DCA6 with Strong-Drive® Screws. Now lets look at shear strength. Strong-Tie DIY - Projects for a strong and beautiful home. Rows of screws shall be vertically offset and evenly staggered. This indicates that glue surface area and glue penetration into the surrounding solid wood fibres is a key to joint strength. A technical document featuring engineering information for structural fasteners featured in the C-F-2019 Fastening Systems Catalog. End screws shall be located 6" from the end and at 1 1/2" to 2" from the bottom of the ledger. We use cookies on this site to enhance your user experience. Shop from our vast selection of self-drilling screws, to improve work efficiency. 5. ings—nails, spikes, screws, bolts, lag screws, drift pins, staples, and metal connectors of various types. A comprehensive guide to help Designers select the most appropriate connections for challenging, high-wind regions. For utmost rigidity, strength, and service, each type of fastening requires joint designs adapted to the strength properties of wood along and across the grain and to dimensional changes that may occur with changes in moisture content. Screw size doesn’t necessarily determine strength. The force on the screw is straight down, and snapping the neck of a screw is not easy. Des recommandations de produits plus récentes sont incluses. Home centers carry the most commonly used structural screw styles and sizes, but usually only one brand. Structural screws aren’t cheap: they generally cost several times more than an equivalent lag screw. An educational reference guide for DIY’ers about safe deck construction. But in hardwoods, a drywall screw will usually fail before the wood fails. Privacy Policy. 3.3 Wood Material: Wood main and side members must be solid-sawn lumber or boards having an assigned specific gravity as given in Tables 2, 3, 4 and 5 of this report. A technical information addendum for Simpson Strong-Tie Fasteners in Canada. Fasteners for Code Compliant Deck Ledgers. Wood Screws: Performance & Mechanical Specs; Description. of the screw includes the threads which has very little strength except in pull out conditions so you will need to go up on screw size to increase shank size to equal that of nails.... there are industry charts online if you need actual limitations Connectors and Fasteners for Mass Timber Construction Catalog. wood has occurred, resistance to fastener-head embedment into the metal causes the screw to become a shear specimen and joint behav-ior is dependent upon the shear strength of the fastener. 11. Wood-to-wood, wood-to-concrete, and wood-to-steel connections are possible. Material strength for threaded fasteners and headed industrial fasteners from Elgin Fasteners Group is listed below by grade, type and class and separated into 60,000 psi, 75,000 psi and 120,000 psi. 3/2D3/4L (inch–pound) (8–14b) where p is maximum withdrawal load (N, lb), D shank di- ameter (mm, in. Teks ® Metal Fasteners are the original self-drilling screws developed to drill, tap, and fasten metal in one motion. ), G specific gravity of the wood based on ovendry weight and volume at 12% moisture content, and L length (mm, in.) Pull-out Resistance - Amount of force required to pull a fastener out of a specified thickness of wood or steel. Provides users with a web-based approach to calculating capacities for single bolts, nails, lag screws and wood screws per the 2015 NDS. Total withdrawal load is based on actual thread penetration into the main member. 1. The metal of the hook will snap before the screw does, if it's installed correctly. The allowable lateral load for a single-screw connection must be taken as the lesser of: (a) the reference lateral design value given in Table 4, adjusted by all applicable adjustment factors, and (b) the allowable screw shear strength given in Tables 1A through 1F. This letter details the alternative MASA/MASAP installation using SDWS screws — with two legs up on a 2x4 vertical rim board or blocking over a 2x or 3x sill plate. The shear strength of a deck screw depends on several factors such as: Length; Thread type; Screw quality; Insertion technique; And the force used on the screw (lateral or withdrawal forces). and (c) the allowable screw tension strength given in Tables 1A through 1F. The strength of a through-bolted connection for multi-ply beams, deck posts, carrying beams and more. They are either produced with cut thread screws, which have a tapered shank, or rolled thread screws, which have a constant shank diameter. and for SPF/HF withdrawal is 121 lb./in. A small amount of wood fibre was still adhered to the tenon, biscuit or dowel, but for the most part the joint failed at the glue line. The Strong-Drive SDWS Timber Screw (Exterior Grade) is ideal for the contractor and do-it-yourselfer alike. A catalog featuring connectors and fasteners for mass timber construction solutions. Will produce a mating thread when assembled into wood or other resilient materials. Threads cut by wood screws into wood, or by sheet-metal screws into fiberglass, lack the strength, consistency, and durability that machined threads inside a metal nut or other thick metal component can provide. Allowable withdrawal load for DF/SP/SCL is 172 lb./in. LSL wood-to-wood applications that require 4 2", 5", 6" and 8" SDS screws are limited to interior-dry use only. All rights reserved. TimberLOK is a heavy duty wood screw for applications such as attaching rafter or trusses to the top plate, landscape timbers, fences, decks, headers, stair stringers and more. Guard Post, Guard Rail and Baluster Installations Using Strong-Drive® Structural Fasteners. For screws having a diameter equal to or larger … Rolled thread screws: At least 4X the basic screw diameter or 2/3 the nominal screw length (whichever is greater). 9 x 3" Gold Star FLAT HEAD Screws (1 Pound) This letter includes details of fastener connections designed and analyzed for use as alternates to those included in DCA6 subject to approval by the local building department. Robertson first pointed out that by design, nails are less brittle than screws, which leads to an increase in shear strength for nails. Un étui à deux faces pour le Canada présentant le matériel nécessaire pour un système de terrasse et un système d’abri de terrasse. 150 lbs. Full penetration is the screw length minus the side member thickness. The piece outlines the vital components of a deck constructed with a continuous load path in mind. Screws shall be placed 1 1/2" to 2" from the top and bottom of the ledger or rim board with 3" minimum and 6" maximum between rows and spaced per the table. While it is designed for wood applications it is also functional for other materials like masonry, drywall, plastic, and up to 24ga steel. All applications are based on full penetration into the main member. SDW and SDWS Double-Shear Applications with Wood Side Members. A screw conversely has very little shear strength. SDWS Timber Screws SDWS Timber Screw to Fasten Wood Structural Panel Single-Surface Splines on CLT Diaphragms. If you need a screw to hold 100 lbs of force, then it’s easy to simply reach for screws that say “100 lbs” right on the package. 2/3 of the nominal screw length. A flier providing features and benefits of the Strong-Drive® SDWS Timber screw. A booklet featuring practical and attractive DIY projects for home and yard using Simpson Strong-Tie® connectors and fasteners, including Outdoor Accents®. Strong-Tie DIY - Proyectos para una casa resistente y hermosa. Both lateral (single and double shear) and withdrawal capacities can be determined. It is code listed under IAPMO UES ER-192 and meets 2015 and 2018 IRC® and IBC® code requirements for several common wood framing applications. Shear strength is the amount of force a fastener can handle from the sides. Capacities based on the AISI S100 Specification Sections E2.4 for MASA/MASAP Alternate Strong-Drive® SDWS Timber Screw Installation. Driver bit included in every box. * Click on the nominal size to find products. Hardened, high-quality, heat-treated steel means virtually no chance of shear-offs. RSS Rugged Structural Screw is an easy to install lag alternative. Allowable Loads for Strong-Drive® SDS, SDWS, and SDWH Structural Fasteners in Sawn Lumber Deck Ledger to Band Joist Applications. For in-service moisture content greater than 19%, use C. Loads are based on installation into the side grain of the wood with the screw axis perpendicular to the face of the member. Double-shear applications with Strong-Drive® SDW Truss-Ply and SDWS Timber screws in wood side members. F = 2850 SG 2 D (1) . © 2020 AFT Fasteners. per inch of thread embedded *  Design Head Pull-Through Strength  Approx 100 lbs. A thread forming screw having a gimlet point, and a sharp crested, coarse pitch thread. Higher values for screw strength (Pss, Pts), may be obtained by specifying screws from a specific manufacturer. of penetration of the threaded part. Catálogo que incluye información sobre productos nuevos y las instrucciones de instalación y especificaciones correspondientes para los sujetadores Simpson Strong-Tie® y los sistemas Quik Drive®. They are either produced with cut thread screws, which have a tapered shank, or rolled thread screws, which have a constant shank diameter. The Strong-Drive® SDW screw is a 8.0mm diameter, high-strength structural wood screw specifically designed for fastening multi-ply wood members together such as plated trusses, engineered timber products and solid-sawn timber. Allowable loads are shown at the wood load duration factor of C … Drill, Tap, Fasten in One Motion. Strong-Drive® Structural Wood Screws for Interior and Exterior Fastening Applications. Values are based on the lesser of withdrawal from the main member or pull-through of a 1 1/2" side member. Fastener Loads for Plywood – Screws Shearing of screw shank Crushing of plywood FIGURE 1 Double-barrier coating provides corrosion resistance equivalent to hot-dip galvanization, making it suitable for certain exterior and preservative-treated wood applications, as described in the evaluation report. A flier providing features, benefits and Canadian limit states load tables for the Strong-Drive® SDWS Timber screw. Engineering specs: average shear strength of #9 shank is 2771 lbs, average pull-out strength 902 lbs (screw pull out is calculated with a 3" length screw in the wood species: yellow pine.) I can't say one type of screw is "better" than the other, but when working with soft woods or when splitting is a concern, drywall screws certainly have their advantages. Le document décrit les composants essentiels d'une terrasse dotée d'un chemin de charge continu. Shear failure of the screw shank occurs at the wood-metal interface. CE marked to EN14592. (except for drywall screws, which are brittle) Spacing includes NDS wet service factor adjustment. Multiple ledger plies shall be fastened together per code independent of the SDWS screws. Specified minimum bending yield strength, allowable tensile strength, and allowable shear strength of the fasteners are listed in Tables 1A, 1B, 1C, and 1D. Fastening Systems Technical Supplement for Canada. Shear strength for screws is lower than solid shank nails..... the dia. Masonry and Concrete do require pre-drilling. A nail, has more elasticity than a screw. W-Cut TM provides low installation torque which allows for fast driving and ease of install; Zip-Tip TM allows for faster penetration; Unique thread design draws two substrates together … This high performance wood screw is not your average screw. Product Sitemaps Full penetration is the screw length minus the side member thickness. Material Strength – 60,000 psi J82 60M or Grade 1 or Class 4.8 SDWS screw spacing values are equivalent to 2018 IRC Table R507.9.1.3(1) and 2015 IRC Table R507.2. Internal drive screws with a slot and currently and far more commonly a Pozi® or Phillips® drive. Corrosion Information Guidelines for selecting the proper connector coatings and fasteners. With over 50 years of experience and innovation, Teks Metal Fasteners delivers Pros' with optimal drilling performance and holding power. In general, the weak link in the attachment of a fastener is the internal threads that the fastener's external threads engage. Only SPAX® construction screws and fasteners are engineered from head to tip to dramatically cut labor time and help you move on to the next job faster. Amplify Your Craft™ Premium Quality Construction Screws & Powerlags® For the pro that puts quality first, we work for you. Un documento técnico información de ingeniería para los sujetadores estructurales que se incluyen en el C-F-2019SP Catálogo de sistemas de sujeción. Find all the screws you need at prices you can't beat. In fact, a 1/4 UNF thread is roughly 14% stronger than a UNC thread, even if the screws are the same size. A tearpad for Canada showing on one side the hardware needed for a deck system, and on the other side the hardware needed for a patio cover system. Screws, on the other hand, may not be as forgiving, but their threaded shafts hold better in wood and draw boards together much more tightly and they have greater tensile strength. The tabulated reference withdrawal design value, W, is in pounds per inch of the thread penetration into the side grain of the main member. And for structural jobs, check out our structural screws department for specially fasteners that will provide high tensile, torque and shear strength. * #8 deck screw in SYP  Design Withdrawal Strength  Approx 100 lbs. The "shear strength", which is the amount of sideways force the screw can resist before it snaps, is high enough. Strong-Drive® SDWS TIMBER Screw Structural Wood-to-Wood Connections Including Ledgers. Un guide de référence à destination des bricoleurs pour construire des terrasses sûres. Fastener Production Information and Stuff & Things, Strong-Drive® SDWS TIMBER Screw (Interior Grade), Soft-Story Retrofits for Building Resiliency, Repair, Protection & Strengthening Systems, Unreinforced Masonry (URM) Building Retrofit, Cross-Laminated Timber (CLT) & Mass Timber Connector Products, Anchoring Solutions for Value-Added Manufacturing, Component Manufacturer Software Solutions, Outdoor Living: Where Great Backyards Begin, New Product Testing in a Virtual Environment, Simpson Strong-Tie Materials Demonstration Laboratory at Cal Poly, Simpson Strong-Tie Research and Testing Laboratory at WSU, Strong-Drive® SDWS TIMBER Screw (Exterior Grade), Fastening Systems Technical and Installation Notes, C-F-2019TECHSUP, pages 22–25, 45–47, 52–53, 75, 77–78, 106, 109–110 and 115–118, Load Tables, Technical Data and Installation Instructions, Contact Webmaster with questions or comments, SawTooth™ point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications, Bold thread design provides superior holding power, Underhead nibs offer greater control when seating the head, Large low-profile washer head provides maximum bearing area (0.75" head dia. A flier providing features, benefits and Canadian limit states load tables for the Strong-Drive® SDWS Timber and SDWH Timber-Hex screws. Copyright © 2018 Simpson Strong-Tie Company Inc. All Rights Reserved Contact Webmaster with questions or comments Privacy Policy User Agreement Products Wood Connectors Fastening Systems Lateral Systems Anchoring Systems Repair, Protection & Strengthening Systems Resources Literature Software & Web Apps Technical Topics Training Video Library Customer Service Technical Questions Contact Us Product Use Information Customer Survey Where to Buy Dealer Locator For Homeowners Strong-Tie DIY High Wind-Resistant Construction Soft-Story Retrofit for Building Owners Deck Ideas, Planning & Safety About News Our History Careers Research & Testing Investor Information Connect With Us   Sign Up for Our Newsletters Green Building and LEED Frequently-asked questions. 3/2D3/4L (metric) (8–14a) p=8,100G. The tabulated reference withdrawal design value, W, Tabulated reference withdrawal design values, W and W. Embedded thread length is that portion held in the main member including the screw tip. For screws located at least 2" but less than 6" from the end, use 50% of the load per screw and 50% of the table spacing between the end screw and the adjacent screw, and for screws located between 2" and 4" from the end, predrill using a 5/32" drill. Wire Tensile Strength ... 266GRABBER® XteK ® Metal to Wood Screws, ... Shear Strength - Measure of the force that when applied at a right angle, will break a fastener. Fastener spacings are based on the lesser of single fastener ICC-ES AC233 testing of the Strong-Drive SDWS Timber screw with a safety factor of 5.0 or ICC-ES AC13 assembly testing with a factor of safety of 5.0. Screw shear strength is the average value, and tension strength is the lowest value listed in CFSEI Tech Note (F701-12). The screw also caused a crack in the piece of wood, which the thinner drywall screw did not. * Click on the nominal size to find products. RSS Rugged Structural Screw. where . Screw Fastening Systems Self-Drilling Screw Fastener Selection and Design 3.6.1 Hilti, Inc. (US) 1-800-879-8000 | I en español 1-800-879-5000 I Hilti (Canada) Corp. 1-800-363-4458 I I Direct Fastening Technical Guide 2015 157 Thread Pitch The thickness of material being fastened and diameter of Fasteners called wood screws are a metal screw used to clamp wood, chipboard, and MDF. It is made with carbon steel and coated for … Structural screws meet stringent engineering standards. per inch of wood … Wood Screws: Dimensions & Mechanical Specs. Ledger shall be hem-fir, Douglas fir–larch, or southern pine species. A guide to recognizing deck deficiencies and building or retrofitting safer, longer-lasting outdoor decks, with 2018 IBC and IRC code-compliant solutions for using the latest connectors and fasteners. The Strong-Drive® SDWS Timber and SDWH Timber-Hex screws may be used to attach a sole plate or top plate to a rim board and blocking material according to details provided in this letter. Reference Lateral Design Values for NDS Geometries with Strong-Drive® Screws. SG = specific gravity of oven dry wood D = diameter of screw (in) Example - Screw Withdrawal Load Screws of nominal lengths too short to accomodate the minimal thread length will have threads extending as close to the underside of the head as practiceable. Wood screw threads are tapered to a sharp point; screw development has introduced points that reduce the potential for splitting the wood and allow assembly without a drilled pilot hole. The bending yield strength value, Fyb, for the wood screw being used also is an input to the yield mode equations. ), Size identification on all SDWS screw heads, 6-lobe T40 drive provides positive engagement that makes the screw easy to drive and improves bit life (replacement driver bit — BIT40T-134-RC), Structural wood-to-wood/engineered including ledgers; mass timber connections including CLT wall-to-wall, floor-to-floor, surface splines and lap joints, Retail and mini-bulk packs include one 6-lobe, T40 driver bit; bulk packs include two driver bits. 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All applications are based on full penetration into the main member. Simpson Strong-Tie evaluated the SDWC15600, SDWS22400DB, SDWS22600DB, SDWS19600 and SDWV13400 screws for use in cross-laminated timber (CLT) butt-joint and half-lap diaphragm connections.
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