The Simpson HTT5 Heavy Tension Tie is a single-piece formed heavy tension tie engineered by Simpson to deliver high-strength, post-pour concrete-to-steel connections in both retrofit and new construction applications. Designed without rivets and built around a four-ply formed seat, this wood-to-concrete connector resists medium tension loads using #10 screws or approved nails, and works with both cast-in-place and post-installed anchor bolts for flexible installation on virtually any job site.

Key Features

• Four-ply formed steel seat - stacks multiple steel layers at the bearing point to deliver increased tension capacity compared to single-ply alternatives, giving structural connections greater load resistance
• No rivets and no anchor bolt washers required - simplifies the installation process, reduces hardware, and eliminates extra steps without compromising structural performance
• Compatible with cast-in-place or post-installed anchor bolts - gives contractors the flexibility to use the same connector for new pours and retrofit projects, reducing the need to stock multiple products
• Suitable for retrofit and new construction projects - a single connector solution that adapts to existing structures or ground-up builds, saving time during planning and procurement
• 11-gauge steel construction - provides the structural thickness needed to handle demanding tension load applications in wood-frame-to-concrete assemblies
• Zinc Galvanized G90 finish - applies a corrosion-resistant coating that helps protect the connector across a range of construction environments, extending service life
• 2-1/2 in. width x 16 in. length with a 5/8 in. anchor rod diameter - purpose-built dimensions that align with standard framing and anchor bolt specifications, reducing field modification

Why This Product

• Rivet-free, washer-free design cuts installation complexity - because the HTT5 is engineered as a single-piece connector without rivets and without the need for anchor bolt washers, installers work with fewer components and complete connections faster on both retrofit and new construction sites
• Four-ply formed seat delivers reliable tension performance - the multi-layer steel seat is purpose-built to resist medium-to-high tension loads at concrete-to-steel connections, making this tie a dependable choice for wood-frame structures anchored to concrete foundations
• Broad fastener compatibility keeps scheduling flexible - the HTT5 accepts multiple approved fastener types including 0.148 x 1-1/2 in. nails, 0.148 x 3 in. nails, 0.162 x 2-1/2 in. nails, or #10 x 1-1/2 in. Strong-Drive SD Connector screws, so crews can work with what is already on the job site
• G90 galvanized coating supports use across varied site conditions - the zinc galvanized finish adds a layer of corrosion resistance that helps maintain connector integrity over time, particularly in exterior or moisture-exposed structural applications

Specifications

• Model Number: HTT5
• Length: 16 in.
• Width: 2-1/2 in.
• Anchor Rod Diameter: 5/8 in.
• Gauge: 11
• Coating/Finish: Zinc Galvanized, G90
• Country of Origin: United States

Approved Applications

• Post-pour, concrete-to-steel structural connections
• Retrofit projects requiring medium-to-high tension load resistance
• New construction requiring wood-to-concrete tension tie connections
• Installations using cast-in-place or post-installed anchor bolts

Downloads and Resources

• Fasteners required. View Specifications

Frequently Asked Questions

What size anchor bolt is required for the HTT5?

The HTT5 is designed for use with a 5/8-in. anchor bolt. It is compatible with both cast-in-place and post-installed anchor bolt installations.

Do I need washers with the HTT5 anchor bolt installation?

No. The HTT5 is specifically designed so that anchor bolt washers are not required, simplifying installation without sacrificing structural performance.

What fasteners are approved for installing the HTT5?

The HTT5 requires (1) 5/8-in. anchor bolt and (26) fasteners. Approved fastener options include 0.148 x 1-1/2-in. nails, 0.148 x 3-in. nails, 0.162 x 2-1/2-in. nails, or #10 x 1-1/2-in. Strong-Drive SD Connector screws.

Is the HTT5 suitable for outdoor or corrosive environments?

The HTT5 is finished with a Zinc Galvanized (G90) coating, which provides corrosion resistance suitable for a range of construction environments.

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