Simpson 3-1/2 x 7 Galvanized Tie Plate TPA37 is a structural connector from Simpson built for splicing and reinforcing wood-to-wood connections on flat members. Backed by the engineering expertise of Simpson Strong-Tie, this tie plate delivers a secure, reliable joint for everything from light repairs to heavy-duty framing work. Its flanged profile and staggered nail pattern make installation straightforward while protecting the integrity of the lumber throughout the life of the connection.

Key Features

• Versatile tie plate design - handles splicing and miscellaneous wood-to-wood connections across a wide range of framing and repair applications, reducing the need for multiple connector types on the job
• Optimized for flat member connections - engineered specifically to reinforce wood-to-wood joints on flat members, providing targeted strength exactly where it is needed
• Staggered nail pattern - distributes fastener load across the wood member to create a secure connection that resists splitting, protecting the lumber and improving long-term joint reliability
• Flanged profile - adds structural support along the plate, helping maintain joint alignment and increasing the overall rigidity of the connection
• 20-gauge steel construction - delivers a solid balance of strength and workability, making the plate easy to install without sacrificing structural performance
• G90 zinc galvanized coating - provides extra corrosion resistance, helping the plate hold up in demanding or moisture-prone environments over the long term

Why This Product

• Engineered for secure, split-resistant joints - the staggered nail pattern is purpose-built to anchor firmly into wood members without causing splits, giving builders and contractors confidence in every connection they make
• Durable corrosion protection built in - the G90 zinc galvanized finish goes beyond basic surface coating to guard against corrosion in tough conditions, making this tie plate a dependable choice for projects where longevity matters
• Flexible enough for a broad range of projects - whether reinforcing a splice on dimensional lumber or tackling miscellaneous wood-to-wood connections, this plate adapts to light and heavy-duty framing needs without requiring specialized tools or fasteners
• Trusted Simpson Strong-Tie engineering - designed by a brand recognized for structural connectors, so builders can rely on consistent quality, straightforward installation, and performance that meets the demands of real-world construction

Specifications

• Model Number: TPA37
• Length: 7 in.
• Width: 3-1/2 in.
• Gauge: 20
• Coating: Zinc Galvanized, G90
• Finish: Zinc Galvanized, G90
• Install With: (32) 0.131 in. x 2-1/2 in. nails, 0.131 in. x 1-1/2 in. nails or #9 Strong-Drive SD screws
• Country of Origin: United States

Frequently Asked Questions

What is the TPA37 tie plate used for?

The TPA37 is designed for splicing and miscellaneous wood-to-wood connections. It is ideal for reinforcing connections on flat members and can be used for a wide range of light repairs or heavy-duty framing projects.

What fasteners are recommended for installing the TPA37?

The TPA37 is installed with (32) 0.131 in. x 2-1/2 in. nails, 0.131 in. x 1-1/2 in. nails, or #9 Strong-Drive SD screws.

What gauge steel is the TPA37 made from, and what corrosion protection does it have?

The TPA37 is made from 20-gauge steel and features a G90 zinc galvanized coating, which provides extra corrosion resistance for demanding environments.

Why does the TPA37 have a staggered nail pattern?

The staggered nail pattern is designed to create a secure connection while resisting splitting of the wood members, ensuring a stronger and more reliable joint.

Note: Product dimensions may differ from picture. Please see item description for specifications.