Strong-Tie SDWS Timber Screws

Simpson Strong-Tie SDWS Timber Screws for Heavy-Duty Wood Construction

Simpson Strong-Tie SDWS Timber Screws are engineered for high-strength structural wood-to-wood connections in large timber, post and beam, and heavy framing applications. Designed to replace traditional lag bolts, these screws deliver exceptional shear and withdrawal values with faster installation and no need for pre-drilling in most cases.

Built for Large Timber and Structural Loads

SDWS Timber Screws feature a large-diameter shank and aggressive thread design that provides deep wood engagement and superior holding power. The sharp point and optimized thread pattern allow for smooth driving, even in dense lumber, reducing splitting and installation fatigue.

With a hex washer head for strong clamping force and secure tool engagement, SDWS screws are trusted for structural connections where strength, speed, and code compliance matter.

Common Applications

• Post and beam construction
• Timber framing and pergolas
• Ledger board attachment
• Multi-ply beam and column assemblies

Key Considerations

• Structural Performance: Designed to replace lag screws in many load-bearing applications when installed per manufacturer specifications.
• Installation Efficiency: Typically eliminates pre-drilling, saving time on large timber projects.
• Head Style: Hex washer head provides strong clamping force and easy installation with impact drivers.
• Corrosion Resistance: Available with protective coatings suitable for exterior and treated lumber applications.

Need Help Selecting SDWS Timber Screws?

Selecting the correct diameter and length is critical for structural integrity. Contact us for expert product guidance and fast shipping on in-stock inventory.