The Simpson MSTI72 72" 12-Gauge Galvanized Medium Strap Tie from Simpson Strong-Tie is a high-capacity steel tension strap built for demanding structural connections across wood I-joists and composite wood products. Measuring 2-1/16 in. wide and 72 in. long, this heavy-gauge strap delivers reliable tension resistance for light repairs and heavy-duty framing projects alike, and its thoughtfully engineered nail pattern makes installation straightforward while protecting the integrity of the lumber it secures.

Key Features

• High-capacity steel tension strap for wood I-joists and vertical composite wood applications - gives builders a single, versatile connector that performs across multiple structural scenarios without needing a different product for each application.
• Staggered nail pattern with 3 in. nail spacing - reduces the risk of wood splitting during fastening, helping maintain the structural integrity of the lumber and speeding up installation with fewer callbacks.
• 12-gauge steel construction - provides the thickness and rigidity needed for load-rated tension connections, making it appropriate for both light repairs and heavy-duty structural framing.
• Zinc Galvanized G90 coating - delivers extra corrosion resistance for long-lasting performance in a variety of job-site environments, helping the connector hold its integrity over the life of the structure.
• 2-1/16 in. width and 72 in. length - sized to span longer connection distances where shorter straps fall short, giving contractors the reach needed for demanding tie applications on wider assemblies.
• Compatible with 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws - works with commonly available fasteners, including screw options suited to pneumatic nailing on diaphragm decking and open-web truss chords.

Why This Product

• Built for I-joist and composite wood connections - unlike basic flat straps, the MSTI72 is specifically engineered for use on wood I-joists as well as vertical applications on composite wood products where applicable, making it a purpose-built solution rather than a generic repair strap.
• Splitting-resistant installation design - the combination of a staggered nail pattern and 3 in. nail spacing actively reduces wood splitting risk, protecting your materials and keeping your connections structurally sound from the first nail to the last.
• Extra corrosion protection you can count on - the G90 zinc galvanized finish goes beyond basic coating to provide genuine long-term corrosion resistance, making the MSTI72 a dependable choice for connections that need to hold up over time.
• American-made quality from a trusted structural connector brand - manufactured in the United States and backed by Simpson Strong-Tie's engineering, this strap tie meets the expectations of professionals working on projects where connection reliability is non-negotiable.

Specifications

• MPN: MSTI72
• Brand: Simpson Strong-Tie
• Length: 72 in.
• Width: 2-1/16 in.
• Gauge: 12
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Install With: 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws (sold separately)
• Country of Origin: United States

Approved Applications

• Wood I-joist tension strap connections
• Vertical use on composite wood products where applicable
• Designed to resist wind and seismic forces
• Suitable for diaphragm decking and wood chord open-web trusses where pneumatic nailing is necessary
• Light repairs and heavy-duty structural projects
• Wide or narrow face lumber connections

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 MSTI72?

Install with 10d x 1-1/2 in. nails or #9 x 1-1/2 in. Strong-Drive SD screws for proper performance and load-rated connections.

Why does the MSTI72 feature a staggered nail pattern?

The staggered nail pattern is specifically designed to reduce the risk of wood splitting during installation. Additionally, the 3 in. nail spacing further minimizes the chance of splitting the wood, making it suitable for both I-joists and composite wood products.

What type of corrosion protection does the MSTI72 have?

The MSTI72 is coated with a Zinc Galvanized G90 finish, which provides extra corrosion resistance for long-lasting performance in a variety of environments.

Can the MSTI72 be used on both the wide and narrow face of lumber?

Yes. Simpson Strong-Tie straps and plates, including this medium strap tie, can be used on the wide or narrow face of lumber for a versatile range of connection applications, from light repairs to heavy-duty structural projects.

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