Simpson Strong-Tie Strong-Drive® SDWS™ TIMBER Screw (Interior Grade)

The Strong-Drive SDWS Timber (Interior Grade) screw – formerly, the SDWS Log screw – is a structural wood screw available in a variety of lengths and is designed for cross-laminated timber assemblies, mass timber construction, log home construction, and general interior applications. These 0.195"- and 0.220"-diameter structural fasteners install faster and easier than comparable lag screws, and the large-diameter washer head pulls members down easily, eliminating the need to use extra washers. It is code listed in IAPMO-UES ER-192 and meets 2018 and 2021 IRC® and IBC® code requirements for most common wood framing applications.

Key Features

• SawTooth® point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
  
• Serrated thread reduces splitting and damage
  
• Large, low-profile washer head with nibs provides maximum bearing area and makes countersinking easy
  
• 6-lobe, T40 drive provides positive engagement that makes the screw easy to drive and improves bit life (replacement driver bit: BIT40T-134-R2)
  
• Size identification on headstamp for easy identification

Applications

Mass timber applications such as surface splines, lap joints, timber framing; log home construction and general interior applications

Product Includes

Replacement driver bit: BIT40T-134

Warning

Industry studies show that hardened fasteners can experience performance problems in wet and corrosive environments. Accordingly, use this product in dry, interior and noncorrosive environments only.

Patent Information

US Patents 9,523,383; 11,181,138