The Strong-Drive SDWS Timber (Interior Grade) screw – formerly, the SDWS Log screw – is a structural wood screw designed for cross-laminated timber assemblies, mass timber construction, log home construction, and general interior applications.
These 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 included)
- 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
Download Specs Sheet: SDWS_TIMBER_Screw_-_Interior_Grade.pdf

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