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SDWC Truss Screw

The Strong‑Drive SDWC Truss Screw provides a truss and rafter-to-top plate connection as well as a method to fasten stud-to-top and bottom plate. The fully-threaded shank engages the entire length of the fastener providing a secure connection.

The SDWC uplift values listed were analysed and calculated based on the characteristic values determined following AS1649-2001 (Timber-Methods of Test for Mechanical Fasteners and Connectors-Basic Working Loads and Characteristic Strength). The SDWC has also been 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.

Key Features
  • Cap Head countersinks fully into the double top plate to avoid interference with plasterboard or finish trades
  • Orange colour for easy inspection of 152 mm screws
  • Fully-threaded shank engages the entire length of the fastener, providing a secure connection between the roof and wall framing members
  • Type-17 Point for faster starts and easier driving
  • Wide tolerance on installation angle makes it easy to install the SDWC correctly — Installation guide included to help ensure proper installation angle
  • Can be installed from inside the structure, eliminating exterior work on the upper stories and enhancing job safety
  • Fastening can be performed before or after exterior sheathing is applied for added flexibility
  • Installation guide included in pack to help ensure proper installation angle
Scope of Use
  • Truss/Rafter-to-Top Plate connection
  • Stud-to-Top and Bottom Plate connection
Limitations on Use
  • Refer to the Technial Data Sheet
  • Installation guide included in pack to help ensure proper installation angle
Statement of Building Code Compliance
  • SDWC Truss Screws are compliant with NZS 3604:2011
B1 Structure compliant
B2 Durability compliant
Independent Assessment
Independent Assessment
Test Results
Test Results
CAD Drawings
Technical Data Sheet
IAPMO UES Evaluation Report


Product Approval


Installation Guide
Full Catalogue: Timber Connectors NZS3604


A leader in structural systems research, testing and innovation, Simpson Strong-Tie is among the world's largest suppliers of solutions and products, helping build safer, stronger structures.

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