The Simpson Strong-Drive SDW Truss-Ply structural wood screw is a high-strength fastener engineered specifically for joining multi-ply wood members such as plated trusses and solid sawn lumber. With a 0.220-inch shank diameter and 6-3/8-inch length, this heavy-duty screw delivers exceptional holding power in multi-ply truss and beam assemblies - allowing framers and structural contractors to fasten from one side without the need to lift, flip, or reposition heavy assemblies. The SawTooth point drives into wood without predrilling, saving time on the job site while maintaining code-compliant structural performance. Its E-coat electrocoating finish provides protection suited to interior structural applications, and the T40 6-Lobe drive system delivers high torque transfer with reduced cam-out during installation.

Key Features

• No-Predrill SawTooth Point - drives directly into multi-ply lumber without predrilling, reducing installation steps and speeding up structural assembly
• 0.220 in. shank diameter with 6-3/8 in. length - optimized geometry penetrates deeply through plated trusses and solid sawn members to achieve strong structural engagement across multiple plies
• Low Profile Head (0.760 in. head diameter) - sits flush against wood surfaces for a clean, low-clearance installation that does not interfere with adjacent members or truss plates
• T40 6-Lobe Drive - provides high torque capacity and positive bit engagement, reducing cam-out and driver slippage during heavy structural fastening
• 1-3/8 in. thread length - concentrates thread engagement in the receiving ply for strong withdrawal resistance where it matters most
• E-coat Electrocoating finish - delivers consistent, even corrosion protection suited for interior structural wood applications
• One-side installation capability - multi-ply trusses and beams can be assembled without flipping heavy members, improving job site safety and efficiency
• Code listed - meets IRC and IBC requirements - qualifies for use in inspected structural framing applications without the need for special engineering

Why This Product

• Designed for multi-ply truss assembly - unlike general-purpose structural screws, the SDW Truss-Ply is specifically engineered and optimized for fastening plated trusses and solid sawn multi-ply lumber, giving builders a purpose-built solution rather than a workaround
• Eliminates the need to flip heavy assemblies - installation from one side means large multi-ply beams and trusses can be fastened in place without repositioning, reducing labor time and physical strain on the crew
• No predrilling required - the SawTooth point self-starts in wood, eliminating a separate drilling step and keeping structural framing timelines on track
• IRC and IBC code compliance - meets the requirements of both the International Residential Code and International Building Code for common framing applications, simplifying the inspection and approval process on permitted projects

Specifications

• Brand: Simpson Strong-Tie
• Shank Diameter (in.): 0.220
• Length (in.): 6 3/8
• Head Diameter (in.): 0.760
• Head Type: Low Profile Head
• Thread Length (in.): 1 3/8
• Point Type: SawTooth Point
• Drive Type: T40 6-Lobe
• Coating: E-coat Electrocoating
• Finish: E-coat Electrocoating
• Country of Origin: Taiwan

Available Pack Options

• SDW22638-R50: 50 Pk - includes one 6-lobe, T-40 driver bit
• SDW22638MB: 200 Pk - includes one 6-lobe, T-40 driver bit
• SDW22638: 500 Pk - includes two 6-lobe, T-40 driver bits

Frequently Asked Questions

Does the Simpson SDW Truss-Ply screw require predrilling before installation?

No. The SDW Truss-Ply features a SawTooth point that is designed to drive directly into wood without the need for predrilling. This simplifies installation and reduces the number of steps required when fastening multi-ply truss and lumber assemblies.

What drive bit does the SDW Truss-Ply screw require?

This screw uses a T40 6-Lobe drive, which provides strong torque transfer and minimizes cam-out during installation. A T40 6-Lobe driver bit is required for proper installation.

Is the SDW Truss-Ply screw code listed for structural framing applications?

Yes. The Strong-Drive SDW Truss-Ply screw is code listed and meets IRC (International Residential Code) and IBC (International Building Code) requirements for several common framing applications, making it suitable for use on inspected and permitted structural projects.

Can this screw be used to fasten multi-ply trusses from one side only?

Yes. The SDW Truss-Ply screw is specifically designed to allow fastening of multi-ply trusses and beams from one side, eliminating the need to lift and flip heavy assemblies during installation.