The Simpson Strong-Drive SDW EWP-Ply structural wood screw is a high-strength fastener engineered specifically for joining multi-ply wood members, including engineered wood products such as structural composite lumber (SCL) and solid sawn lumber. With a 0.220 in. shank diameter and 3-3/8 in. length, this screw installs without predrilling, making it a practical choice for framers and structural contractors working with laminated engineered lumber assemblies. Its low-profile head and SawTooth point are purpose-built to reduce interference after installation and drive cleanly into dense wood fibers, while the E-coat electrocoating finish provides durable protection for interior structural applications. Code listed under IAPMO-UES ER-192, this screw meets 2015 and 2018 IRC and IBC requirements for common wood framing and engineered-wood applications.

Key Features

• No predrilling required - saves significant labor time during multi-ply engineered lumber assembly, allowing crews to drive fasteners directly without a separate drilling step
• SawTooth point - aggressively bites into engineered wood and solid sawn lumber on contact, reducing drive effort and minimizing wood splitting at entry
• Low Profile Head (0.760 in. diameter) - sits nearly flush after installation, making it easier to stack and slide assembled girders and allowing finishes or structural connectors to install cleanly over the fastened surface
• T40 6-Lobe drive - provides high torque transfer with reduced cam-out risk, giving installers better control when driving into dense structural lumber
• E-coat electrocoating finish - delivers a tough, uniform corrosion-resistant coating suited for interior structural wood framing environments
• Optimized 3-3/8 in. length with 1-1/2 in. thread length - engineered specifically for fastening 1-3/4 in. engineered lumber members, ensuring proper thread engagement without over-penetration
• Code listed under IAPMO-UES ER-192 - meets 2015 and 2018 IRC and IBC code requirements, giving engineers and inspectors the documentation needed for structural approval

Why This Product

• Designed specifically for engineered wood multi-ply assemblies - unlike general-purpose wood screws, the SDW EWP-Ply is sized and threaded for 1-3/4 in. engineered lumber such as SCL, meaning the thread engagement, head profile, and length are all optimized for this exact application rather than adapted from a different product category
• Eliminates predrilling in structural connections - the SawTooth point allows direct installation into multi-ply wood members, reducing the number of tools and steps needed on the job site without compromising holding strength
• Low-profile head simplifies post-installation work - the near-flush head reduces interference when stacking assembled girders or attaching structural connectors and finishes, cutting down on the fitting and grinding steps that raised heads can require
• Backed by recognized structural code listings - IAPMO-UES ER-192 code compliance under 2015 and 2018 IRC and IBC gives contractors and specifiers confidence that these fasteners will satisfy inspection requirements for engineered-wood framing applications

Specifications

• Brand: Simpson Strong-Tie
• Shank Diameter (in.): 0.220
• Length (in.): 3-3/8
• Head Diameter (in.): 0.760
• Thread Length (in.): 1-1/2
• Head Type: Low Profile Head
• Drive Type: T40 6-Lobe
• Point Type: SawTooth Point
• Coating: E-coat Electrocoating
• Finish: E-coat Electrocoating
• Country of Origin: Taiwan

Available Pack Options

• SDW22338-R50: 50 Pk - includes one 6-lobe, T40 driver bit
• SDW22338MB: 250 Pk - includes one 6-lobe, T40 driver bit
• SDW22338: 900 Pk - includes two 6-lobe, T40 driver bits

Approved Applications

• Engineered Wood - Multi-Ply Fastening
• Fastening Wood-to-Wood

Frequently Asked Questions

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

No. The SDW EWP-Ply screw features a SawTooth point that allows direct installation into multi-ply wood members, including engineered wood products and solid sawn lumber, without any predrilling. This speeds up assembly and reduces the number of tools needed on site.

What type of drive bit does the SDW EWP-Ply screw use?

This screw uses a T40 6-Lobe drive. The 6-lobe geometry provides strong torque transfer and reduces cam-out during installation, which is especially useful when driving into dense engineered lumber assemblies.

What code listings apply to this screw, and which building codes does it satisfy?

The Strong-Drive SDW EWP-Ply screw is code listed under IAPMO-UES ER-192 and meets requirements under the 2015 and 2018 International Residential Code (IRC) and International Building Code (IBC) for several common wood framing and engineered-wood applications. This code listing supports use in inspected structural assemblies.

Why does the SDW EWP-Ply screw have a low-profile head, and how does that help during installation?

The low-profile head with a 0.760 in. diameter is designed to sit nearly flush with the wood surface after installation. This reduces interference when stacking or sliding assembled girders and simplifies the installation of finishes or structural connectors over the fastened area, minimizing extra fitting or trimming steps.