The Simpson MSTI36 Medium Strap Tie is a heavy-duty steel tension connector built to handle demanding structural applications with confidence. Fabricated from 12-gauge steel and finished with a G90 zinc galvanized coating, this 36-inch strap tie is engineered for high-capacity tension resistance across wood I-joist connections, composite wood products, open-web truss chord connections, diaphragm decking, and applications requiring resistance to wind and seismic forces. A thoughtfully designed staggered nail pattern with 3 in. spacing makes installation cleaner and more reliable, whether you are working on the wide or narrow face of lumber for light repairs or heavy-duty structural projects.

Key Features

• High-capacity steel tension strap compatible with wood I-joists and composite wood products - handles demanding structural loads across a wide range of connection types, giving builders a single versatile connector for multiple framing scenarios.
• Staggered nail pattern combined with 3 in. nail spacing - minimizes the chance of splitting the wood during fastening, protecting the integrity of the lumber and reducing costly callbacks or rework.
• 12-gauge steel construction - delivers the structural strength needed for heavy-duty connections while keeping the strap thin enough to install cleanly without interfering with adjacent components.
• G90 zinc galvanized finish - provides an extra level of corrosion resistance to help the connector hold up in tough jobsite conditions and extend the service life of the connection.
• 2-1/16 in. width at 36 in. length - sized to work on both the wide and narrow face of lumber, offering flexibility across a broad range of framing and repair applications.
• Compatible with 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws - supports both pneumatic nailing and screw fastening, making it a practical fit for diaphragm decking and truss chord applications where pneumatic tools are in use.

Why This Product

• Engineered for versatility across structural connection types - from I-joist tension straps to wind and seismic resistance connections, this strap tie covers a broad set of approved applications that other general-purpose straps may not address.
• Split-reducing design protects your lumber investment - the combination of a staggered nail pattern and 3 in. nail spacing is a deliberate engineering choice that reduces the risk of damaging the very material the strap is meant to reinforce.
• Dual fastener compatibility keeps your workflow flexible - support for both nails and Strong-Drive SD screws means this strap tie adapts to the fastening method already on your jobsite, reducing the need to source specialty hardware.
• American-made with durable G90 galvanized protection - the G90 coating goes beyond standard galvanizing to provide extra corrosion resistance, making this connector a dependable long-term choice for exposed or moisture-prone framing environments.

Specifications

• Model Number: MSTI36
• Gauge: 12
• Width: 2-1/16 in.
• Length: 36 in.
• Thickness: 97 mil
• Coating/Finish: Zinc Galvanized, G90
• Country of Origin: United States
• Install With: 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws (sold separately)

Approved Applications

• Wood I-joist tension strap connections
• Vertical use on composite wood products where applicable
• Diaphragm decking applications where pneumatic nailing is necessary
• Wood chord open-web truss connections where pneumatic nailing is necessary
• Connections requiring resistance to wind and seismic forces
• Wide or narrow face lumber connections for light repairs or heavy-duty projects

Options

• Special sizes can be made to order. Contact us for Configurable Options and Special orders

Frequently Asked Questions

What fasteners are recommended for installing the MSTI36?

The MSTI36 is designed to be installed with 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws for optimal performance.

How does the MSTI36 help prevent wood splitting during installation?

The MSTI36 features a staggered nail pattern combined with a 3 in. nail spacing, both of which work together to minimize the chance of splitting the wood during fastening.

What type of corrosion protection does the MSTI36 have?

The MSTI36 is coated with a G90 zinc galvanized finish, which provides an extra level of corrosion resistance to help extend the life of the connector in demanding environments.

Can the MSTI36 be used on both faces of lumber?

Yes, Simpson Strong-Tie straps, including the MSTI36, can be used on the wide or narrow face of lumber, and many are designed to be used back-to-back on a piece of lumber without fastener interference.

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