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Strong-Drive® SDWC™ TRUSS Screw 

Strong-Drive® Interior Wood Screws

This product's information may differ depending on the category of use. You are currently viewing details related to Strong-Drive® Interior Wood Screws. You can also view product information related to the category: Fasteners for the Quik Stik™ System

The Strong-Drive SDWC Truss screw provides a stud-to-bottom plate or stud-to-top plate connection as well as fastening trusses and rafters to top plates. The fully-threaded shank engages the entire length of the fastener, providing a secure connection. The SDWC is tested in accordance with ICC-ES AC233 (screw) and AC13 (wall assembly and roof-to-wall assembly) for uplift and lateral loads between wall plates and vertical wall framing and between the top plate and the roof rafters or trusses. It is code listed under IAPMO-UES ER-262 and meets 2018 and 2021 IRC® and IBC® code requirements for most common wood framing applications.

Key Features

  • Fully threaded shank engages the entire length of the fastener, providing a secure connection between the roof and wall framing members
  • Cap-style head countersinks fully into the double top plate to avoid interference with drywall or finish trades
  • Wide tolerance on installation angle makes it easy to install the SDWC correctly
  • Can be installed from inside the structure, eliminating exterior work on the upper stories and enhancing job safety
  • 6-lobe, T30 driver bit provides positive engagement that makes the screw easy to drive and improves bit life (replacement driver bit — BIT30T-2-R2)
  • Fastening can be performed before or after exterior sheathing is applied for added flexibility
  • Metal installation guide tool (included) to help ensure proper installation
  • Orange color for easy inspection
  • Type-17 point for faster starts and easier driving
  • SDWC15450 is recognized for use in chemically treated wood as described in the evaluation report

Applications

  • Truss/rafter-to-plate and stud-to-plate connections

Product Includes

SDWC15450-KT and SDWC15600-KT contain:

  • (50) Strong-Drive SDWC screws
  • (1) Matched-tolerance driver bit (part no. BIT30T-2-R2; also sold separately)
  • (1) Metal installation guide tool
    • SDWC-GUIDE (for SDWC15600 only)
  • (500) Strong-Drive SDWC screws
  • (2) Matched-tolerance driver bits (part no. BIT30T-2-R2; also sold separately)
  • (2) Metal installation guide tools
    • SDWC-GUIDE (for SDWC15600 only)
      or
    • SDWC-GUIDE275 (for SDWC15450 only)

Related Literature

Product Information Table

Fastener Production Information and Stuff & Things
Model No. Coating/Material Length (in.) Head Diameter (in.) Shank Diameter (in.) Drive Type Head Type Thread Length (in.) Point Type Color Packaging Qty.
SDWC15450B-KT E-coat® Electrocoating 4 1/2 0.335 0.155 T30 6-Lobe Cap Head 4 1/4 Type-17 Point Black 500
SDWC15450-KT E-coat® Electrocoating 4 1/2 0.335 0.155 T30 6-Lobe Cap Head 4 1/4 Type-17 Point Black 50
SDWC15600B-KT Clear Zinc Coating 6 0.335 0.155 T30 6-Lobe Cap Head 5 3/4 Type-17 Point Orange 500
SDWC15600-KT Clear Zinc Coating 6 0.335 0.155 T30 6-Lobe Cap Head 5 3/4 Type-17 Point Orange 50

Product Information Table

Model No. Length (in.) Drive Type Head Type Thread Length Shank Diameter (in.) Point Type Coating/Material Color Packaging Quantity UPC
SDWC15450B-KT 4 1/2 T-30 6-Lobe Cap Head 4 1/4 0.152 Type-17 Point E-Coat™ Electrocoating Black 500 707392902102
SDWC15450-KT 4 1/2 T-30 6-Lobe Cap Head 4 1/4 0.152 Type-17 Point E-Coat™ Electrocoating Black 50 746056235507
SDWC15600B-KT 6 T-30 6-Lobe Cap Head 5 3/4 0.152 Type-17 Point Clear-Zinc Coating Orange 500 707392888307
SDWC15600-KT 6 T-30 6-Lobe Cap Head 5 3/4 0.152 Type-17 Point Clear-Zinc Coating Orange 50 746056548027

Load Tables

SDWC — Allowable Shear Loads — DFL, SP, SPF

  1. Allowable loads are shown at the wood load duration factor of CD = 1.0. Loads may be increased for load duation up to a CD = 1.6.
  2. Tabulated values must be multiplied by all applicable adjustment factors per the NDS.
  3. The main and side members shall be sawn lumber or structural composite lumber with a specific gravity or equivalent specific gravity 0.42 to 0.55.
  4. Zpara — Parallel-to-grain loading in the side member and perpendicular-to-grain loading in the main member.
  5. Zperp — Perpendicular-to-grain loading in the side member and perpendicular-to-grain loading in the main member, except for 2x (edge) where main member is loaded parallel to grain.
  6. The connection conditions of this table are for specific intended applications. Reference lateral design values for all other shear connections are calculated following the NDS.

SDWC — Allowable Withdrawal and Pull-Through Loads — DFL, SP, SPF

  1. Allowable loads are shown at the wood load duration factor of CD = 1.0. Loads may be increased for load duration up to a CD = 1.6.
  2. Tabulated values must be multiplied by all applicable adjustment factors per the NDS.
  3. The reference withdrawal and pull-through values are in pounds per inch of the thread penetration into the main member and a minimum 1 1/2" thick side member, respectively.

SDWC — Allowable Roof-to-Wall Connection Loads — DFL, SP, SPF, HF — Single-Screw Connections

Size (in.) Model No. Thread Length (in.) Installation Allowable Loads (lb.)
DFL SP SPF
Uplift F1 F2 Uplift F1 F2 Uplift F1 F2
  1. Loads have been increased for wind and earthquake (CD=1.6); no further increases allowed. Reduce when other loads govern.
  2. The SDWC is to be installed through a double 2x top plate into a minimum 2x4 truss or rafter.
  3. The SDWC screws shall be driven such that the shank is fully embedded in the connection members, the head is in contact with or embedded in the side member, and the point does not protrude from the lateral surface of the main member. When embedded, the top surface of the head shall be no more than 1/8" beyond flush.
  4. An SDWC screw may be used in each ply of two- or three-ply rafters or trusses. The allowable uplift load for each screw shall be multiplied by 0.90, but may be limited by the capacity of the plate or the connection between the top plate to the framing below. SDWC screws in multi-ply assemblies must be spaced a minimum of 1 1/2" o.c.
  5. Screws are shown installed on the interior side of the wall. Installations on the exterior side of the wall are acceptable when the rafter/truss overhangs the top plates a minimum of 3 1/2".
  6. For Uplift Connection Load Path, the designer shall verify complete continuity of the uplift load path.
  7. F1 and F2 are the directions parallel and perpendicular to the wall, respectively.
  8. When a screw is loaded simultaneously in more than one direction, the allowable load must be evaluated using the unity equation: (Design Uplift ÷ Allowable Uplift) + (Design F1 ÷ Allowable F1) + (Design F2 ÷ Allowable F2) ≤ 1.0. The three terms in the unity equation represent the possible generated force directions. The number of terms that must be considered for simultaneous loading is the sole discretion of the designer and depends on the method of calculating wind forces and the utilization of the screws within the structural system.
  9. Table loads do not apply to trusses with end-grain bearing.
  10. Top plate-to-stud and top-plate splice connections shall be fastened per applicable Building Code.
0.152 x 6 SDWC15600 5 3/4 1 835 405 225 900 505 225 595 305 190
2 715 270 805 380 505 265
3
4
Compound Angle 615 245 225 645 360 225 485 235 190
Gable End 860 620 375 980 625 445 635 425 300
Installation 1 — Rafter/Truss Offset from Stud: Fasten Straight up Through Double Top Plate Installation — Narrow Face of Stud or Over Header
Installation 1 — Rafter/Truss Offset from Stud: Fasten Straight up Through Double Top Plate
Installation — Narrow Face of Stud or Over Header

(offset truss similar)
Installation 2 — Rafter/Truss Offset from Stud: Fasten from Front Bottom Corner of Double Top Plate Optional SDWC Installation — Truss Offset from Stud
Installation 2 — Rafter/Truss Offset from Stud: Fasten from Front Bottom Corner of Double Top Plate
Optional SDWC Installation — Truss Offset from Stud
Installation 3 — Rafter/Truss Aligned with Stud: Fasten from Wide Face of Stud
Installation 3 — Rafter/Truss Aligned with Stud: Fasten from Wide Face of Stud
Installation 4 — Rafter/Truss Aligned with Stud: Fasten from Narrow Face of Stud: Optional SDWC Truss Screw Installation — Truss Aligned with Stud (rafter aligned with stud similar)
Installation 4 — Rafter/Truss Aligned with Stud: Fasten from Narrow Face of Stud
Optional SDWC Truss Screw Installation — Truss Aligned with Stud
(rafter aligned with stud similar)

(offset truss similar)
Installation 5 — Rafter/Truss Aligned with Stud: Fasten from Corner of Stud: Optional SDWC Truss Screw Installation — Truss Aligned with Stud(rafter aligned with stud similar)
Installation 5 — Rafter/Truss Aligned with Stud: Fasten from Corner of Stud
Optional SDWC Truss Screw Installation — Truss Aligned with Stud
(rafter aligned with stud similar)
Installation 6 — Rafter/Truss Gable End Installation: Optional SDWC Installation — Truss Aligned with Top Plate
Installation 6 — Rafter/Truss Gable End Installation
Optional SDWC Installation — Truss Aligned with Top Plate
SDWC Rafter/Truss-to-Top Plate Connections Utilizing Two-Screw Configurations

Allowable loads for the SDWC Truss screws when installed from the underside of the top plate and from the face of the rafter/truss using a two-screw configuration per the detail configurations shown on the next page.

SDWC — Allowable Loads for Rafter/Truss-to-Top Plate Two-Screw Connections

  1. Loads have been increased for wind and earthquake loading (CD=1.6) with no further increase allowed; reduce where other loads govern.
  2. For Uplift Connection Load Path, the designer shall verify complete continuity of the uplift load path.
  3. When cross-grain tension cannot be avoided, supplemental reinforcement shall be considered by the designer.
  4. The SDWC screws shall not interfere with other fasteners or truss plates. Where truss plates must be penetrated for Configuration D, a Truss Designer approval is required in accordance with ANSI/TPI 1-2007 /2014, Section 7.5.3.4 and 8.9.2. To predrill through truss plate, use a 1/8" drill bit.
  5. The metal installation guide provided with the screw is angled at 22.5° and can be used for Configurations C and D; proper installation angles for all configurations are the responsibility of the installer.
  6. SDWC screws must be offset min. 1/4" from top plate splices for full values.
  7. Loads assume minimum overhang of 3 1/2".
  8. When a screw is loaded simultaneously in more than one direction, the allowable load must be evaluated using the unity equation: (Design Uplift ÷ Allowable Uplift) + (Design F1 ÷ Allowable F1) + (Design F2 ÷ Allowable F2) ≤ 1.0. The three terms in the unity equation represent the possible generated force directions. The number of terms that must be considered for simultaneous loading is the sole discretion of the designer and depends on the method of calculating wind forces and the utilization of the screws within the structural system.
  9. An SDWC screw may be used in each ply of two- or three-ply rafters or trusses. The allowable uplift load for each screw shall be multiplied by 0.90, but may be limited by the capacity of the plate or the connection between the top plate to the framing below. SDWC screws in multi-ply assemblies must be spaced a minimum of 1 1/2" o.c.
Truss Aligned with Stud
Configuration A: Truss Aligned with Stud Install through Top Plate into Rafter/Truss
Both screws installed at a 4° – 14° angle, offset 3/4" – 1 1/4" from opposite edges of the top plate.
Configuration B: Truss Offset from Stud Install through Top Plate into Rafter/Truss
Configuration B: Truss Offset from Stud Install through Top Plate into Rafter/Truss
Both screws installed vertically ±5° into the center of the rafter/truss from the underside of the top plate, 1/2" – 1" from opposite edges of the top plate.
Configuration C: Install through Top Plate into Rafter/Truss
Configuration C: Install through Top Plate into Rafter/Truss
Both screws installed at a 16° – 30° angle, offset 1/2" from the opposite edges of rafter/truss. Use metal installation guide included in screw kits for optimal 22° installation.
Truss Aligned with Stud
Configuration D: Install Rafter/Truss to Top Plate
Both screws installed at a 20° – 25° angle with a 1/2" – 7/8" offset from the opposite edges of top plate 3" ± 1/4" above top plate. Use metal installation guide included in screw kits for optimal 22° installation. To predrill through truss plates, use a 1/8" drill bit.

SDWC — Allowable Loads for Wide Face of Stud-to-Plate Connections — DFL, SP, SPF, HF

  1. Loads have been increased for wind and earthquake loading (CD = 1.6) with no further increases allowed; reduce where other loads govern.
  2. Allowable loads are for SDWC installed per the installation instructions.
  3. The SDWC15450 is to be installed through the face of 2x stud into a single 2x bottom plate over a concrete/masonry foundation.
  4. The SDWC15600 is to be installed through the face of 2x stud into a single 2x bottom plate over a wood floor system.
  5. The SDWC15600 is to be installed through the face of 2x stud into a double 2x top or bottom plate.
  6. Double-top plates shall be fastened together as required by applicable code.
  7. When a screw is loaded simultaneously in more than one direction, the allowable load must be evaluated using the unity equation: (Design Uplift ÷ Allowable Uplift) + (Design F1 ÷ Allowable F1) + (Design F2 ÷ Allowable F2) ≤ 1.0. The three terms in the unity equation represent the possible generated force directions. The number of terms that must be considered for simultaneous loading is the sole discretion of the designer and depends on the method of calculating wind forces and the utilization of the screws within the structural system.
Stud-to-Top Plate Connection
Stud-to-Top Plate Connection
(This application requires SDWC15600)

Strong-Drive® SDWC TRUSS Screw for Narrow Face of Stud-to-Plate Connections

The Strong-Drive SDWC Truss screw provides an easy-to-install, high-capacity solution for stud-to-bottom plate or stud-to-top plate(s) connections. This table provides additional allowable load information for the SDWC screws when installed through the narrow face of the stud. The allowable loads are for SDWC screws installed per the details shown installed per the details shown.

SDWC — Allowable Loads for Narrow Face of Stud-to-Plate Connections

  1. Loads have been increased for wind and earthquake (CD=1.6). No further increase is allowed; reduce when other loads govern.
  2. The SDWC15600 is to be installed through the narrow face of 2x stud into a single 2x bottom plate over a wood floor system.
  3. The SDWC15450 is to be installed through the narrow face of 2x stud into a single 2x bottom plate over a concrete/masonry foundation.
  4. Double-top plates shall be fastened together as required by applicable Code.
  5. When a screw is loaded simultaneously in more than one direction, the allowable load must be evaluated using the unity equation: (Design Uplift ÷ Allowable Uplift) + (Design F1 ÷ Allowable F1) + (Design F2 ÷ Allowable F2) ≤ 1.0. The three terms in the unity equation represent the possible generated force directions. The number of terms that must be considered for simultaneous loading is the sole discretion of the designer and depends on the method of calculating wind forces and the utilization of the screws within the structural system.
  6. One SDWC screw per stud maximum when installed in the narrow face of the stud. Where the SDWC screws are installed on multiple adjacent studs, the minimum spacing between screws must be 1 1/2". The allowable uplift load for each screw shall be multiplied by 0.90, but may be limited by the capacity of the plate.
  7. For Uplift Continuous Load Path, connections in the same area (i.e., truss to plate connector and plate to stud connector) must be on the same side of the wall.

SDWC — Allowable Shear Loads for Sole-to-Rim Connections

  1. Allowable loads are based on testing per ICC-ES AC233 and are limited to parallel-to-grain loading.
  2. Allowable loads are shown at the wood load duration factor of CD = 1.00. Loads may be increased for load duration by the building code up to a CD = 1.60.
  3. Minimum spacing of the SDWC is 6" o.c., minimum end distance is 6", and minimum edge distance is 5/8".
  4. Wood structural panel up to 1 1/8" thick is permitted between the sole plate and rim board provided it is fastened to the rim board per code and the minimum penetration of the screw into the rim board is met.
  5. A double 2x sole plate and/or top plate is permitted provided it is independently fastened per the code and the minimum screw penetration per the table is met.
  6. Minimum rim board height shall be 9 1/4" when using fasteners for sole plate and top plate fastening.
  7. Sole-to-rim load can be achieved without a wall below.

See additional Load Tables, Technical Data and Installation Instructions for the Strong-Drive® SDWC Truss screw

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT