The Simpson MSTC66B3Z 62-7/8 in. 14-Gauge ZMAX Galvanized Pre-Bent Medium Strap from Simpson Strong-Tie is a purpose-built structural connector engineered to transfer tension loads from an upper-story shearwall to a beam on the story below. Pre-bent from 14-gauge steel and finished with ZMAX galvanization, this heavy-duty strap is well-suited for exterior structural connections and treated-wood applications where reliable load transfer and corrosion resistance are non-negotiable. Whether reinforcing multi-story assemblies or supporting light repairs, it provides a straightforward, code-friendly solution for demanding structural joints.

Key Features

• Pre-bent profile designed for shearwall-to-beam tension transfer - arrives ready to install at the connection point between an upper-story shearwall and the beam below, reducing on-site fabrication and ensuring consistent load-path alignment.
• 14-gauge steel construction - delivers the structural strength needed for heavy-duty connections without adding unnecessary bulk to the assembly.
• ZMAX galvanized finish - provides extra corrosion resistance beyond standard galvanization, making this strap dependable in exterior environments and compatible with treated lumber where preservative chemicals can accelerate corrosion of lesser coatings.
• Minimum 3 in. beam width can be made up by double 2x members - gives builders flexibility to meet the beam-width requirement using common framing lumber rather than requiring a single wide member, simplifying material selection on the job site.
• 3 in. wide by 62-7/8 in. tall strap profile - the medium strap dimensions span the connection zone fully, ensuring adequate fastener placement area for a secure, load-rated installation.
• Installs with 10d common nails - works with standard, readily available fasteners, keeping installation straightforward without specialty hardware.
• Compatible with back-to-back installation on a single piece of lumber - multiple straps can be used together without fastener interference, supporting higher-load applications within the same assembly.

Why This Product

• Engineered specifically for multi-story shearwall connections - unlike general-purpose straps, this connector is pre-bent and dimensioned to address the precise structural demand of carrying tension from an upper-story shearwall down to a supporting beam, reducing guesswork in critical load-path design.
• ZMAX coating adds a meaningful layer of durability - for contractors working with pressure-treated framing or in moisture-exposed conditions, the enhanced galvanization helps protect the connector over the long term where standard zinc coatings may fall short.
• Flexible installation with common materials - the ability to satisfy the minimum beam width requirement using double 2x members, combined with standard 10d common nail installation, means this strap integrates into typical framing workflows without special-order lumber or exotic fasteners.
• Made in the United States by a trusted structural connector brand - Simpson Strong-Tie straps and plates are a recognized staple of structural framing, giving builders and inspectors confidence in the connector's design intent and consistent manufacturing quality.

Specifications

• MPN: MSTC66B3Z
• Brand: Simpson Strong-Tie
• Gauge: 14
• Width: 3 in.
• Height: 62-7/8 in.
• Coating/Finish: ZMAX
• Min. Beam Width: 3-1/2 in.
• Min. Beam Depth: 11-1/4 in.
• Installation Fasteners: 10d common nails (sold separately)
• Country of Origin: United States

Approved Applications

• Transferring tension loads from an upper-story shearwall to a beam on the story below
• Exterior structural connections requiring enhanced corrosion resistance
• Treated-wood applications where standard galvanization may be insufficient
• Connections involving double 2x members to meet minimum beam width requirements
• Light repairs and heavy-duty structural projects requiring strap reinforcement

Frequently Asked Questions

What is the primary purpose of the Simpson MSTC66B3Z pre-bent strap?

The MSTC66B3Z is specifically designed to transfer tension loads from an upper-story shearwall to a beam on the story below, making it an essential component in multi-story structural assemblies.

What are the minimum beam size requirements for installing this strap?

The minimum beam width required is 3-1/2 in. and the minimum beam depth is 11-1/4 in. Additionally, a minimum 3 in. beam width may be made up by using double 2x members.

Why is the ZMAX galvanized finish important for this strap?

The ZMAX galvanization provides extra corrosion resistance compared to standard galvanized coatings, making the MSTC66B3Z suitable for exterior applications and use with treated wood, where exposure to moisture and preservative chemicals can accelerate corrosion.

What fasteners should be used to install the MSTC66B3Z?

This strap should be installed with 10d common nails for proper load transfer and code-compliant performance.

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