The Simpson MSTCM40 40-1/4 in. 16-Gauge Galvanized Medium Strap Tie is a Simpson Strong-Tie connector engineered for wood-to-masonry structural connections where reliable tension resistance is critical. Designed to join wood framing to grouted concrete block or concrete, this strap tie delivers straightforward, load-rated performance across a wide range of applications including uplift connections and floor-to-floor clear span installations. Simpson Strong-Tie straps and plates join and reinforce joints with simple, versatile solutions, and the MSTCM series is purpose-built for wood-to-masonry applications where consistent, code-compliant results matter.

Key Features

• Countersunk nail slots (MSTC series) - produce a lower nailing profile for a cleaner, more flush installation against framing members, reducing protrusion at the connection point
• Wood-to-masonry compatibility - attaches to grouted concrete block and wood framing, making this strap tie suitable for a broad range of structural connections between masonry and wood assemblies
• Minimum 1 1/2 in. end and edge distance for Titen screws - clearly defined fastener clearance requirements help ensure proper load performance and support code compliance on the job site
• 16-gauge steel construction - provides the structural strength needed for demanding uplift and tension load applications without unnecessary bulk
• G90 zinc galvanized finish - delivers extra corrosion resistance, making this strap tie a dependable choice for installations where moisture exposure is a concern
• 40-1/4 in. length, 3 in. width - proportioned specifically for medium-span wood-to-masonry connections, giving installers a ready-to-use solution without field modification

Why This Product

• Purpose-built for wood-to-masonry uplift - the MSTCM40 is specifically designed for wood-to-masonry applications, including resistance to wind and seismic tension loads, so structural contractors get a connector matched to the demands of these connections rather than a generic strap adapted to fit
• Faster, cleaner installation - countersunk nail slots reduce nailing profile and work alongside a defined fastener schedule using 16d sinkers and Titen 2 screws, giving crews a clear, efficient installation path on both GFCMU and concrete substrates
• Corrosion resistance built in - the G90 zinc galvanized coating provides extra protection against corrosion, supporting long-term performance in exterior and moisture-prone environments common in masonry construction
• Trusted Simpson Strong-Tie engineering - backed by Simpson's reputation for versatile, load-rated connector solutions, this strap tie fits into a broad system of straps and plates designed to simplify structural connections across light repair and heavy-duty project types

Specifications

• Model Number: MSTCM40
• Length: 40-1/4 in.
• Width: 3 in.
• Gauge: 16
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Material: Steel
• Country of Origin: United States

Approved Applications

• Wood-to-masonry uplift connections
• Attachment to grouted concrete masonry units (GFCMU)
• Attachment to concrete and wood framing
• Floor-to-floor clear span applications
• Resistance to wind and seismic tension loads

Frequently Asked Questions

What types of masonry substrates is the MSTCM40 compatible with?

The MSTCM40 attaches to grouted concrete block (grout-filled concrete masonry units, or GFCMU) and concrete, as well as wood framing, making it suitable for a variety of wood-to-masonry structural connections.

What fasteners are required to install the MSTCM40?

Install with 16d sinkers and (a) 1-1/4 in. x 2 in. Titen 2 screws for GFCMU or (b) 1-1/4 in. x 1-3/4 in. Titen 2 screws for Concrete.

What is the minimum end and edge distance required for Titen screws?

The minimum end and edge distance for Titen screws is 1-1/2 in., which must be observed to ensure proper load performance and code compliance.

Why does the MSTCM40 feature countersunk nail slots?

The countersunk nail slots are a defining characteristic of the MSTC series and provide a lower nailing profile, helping to reduce protrusion and create a cleaner, more flush installation against framing members.

Note: Product dimensions and/or screw or bolt holes may differ from picture. Please see item description for specifications.