The Simpson HTT4HDG Heavy Tension Tie is a single-piece formed connector engineered by Simpson to resist medium tension loads in high-strength, post-pour, concrete-to-steel connections. Built from 11-gauge steel with a four-ply formed seat, this heavy tension tie delivers increased tension capacity without the need for rivets or anchor bolt washers, keeping installation straightforward on both retrofit upgrades and new construction projects. The hot-dip galvanized finish adds a durable layer of corrosion resistance, making this tension connector a reliable choice wherever exterior conditions or treated lumber are part of the build.

Key Features

• Four-ply formed steel seat - concentrates material where it matters most, delivering increased tension capacity for demanding wood-to-concrete connections
• No rivets and no anchor bolt washers required - simplifies the installation process and reduces the number of components you need to manage on the job site
• Compatible with cast-in-place or post-installed anchor bolts - gives installers the flexibility to use this connector in both planned new construction and retrofit situations where access or scheduling is a factor
• Hot-dip galvanized coating - provides extra corrosion resistance suited to exterior environments and treated-wood applications where standard finishes may fall short
• Single-piece formed construction - eliminates assembly of multiple parts, reducing labor time and minimizing potential points of failure in the connection
• Made in the United States from 11-gauge steel - offers consistent material quality and dimensional precision for code-sensitive structural applications

Why This Product

• Versatile enough for retrofit and new construction alike - because the HTT4HDG works with both post-installed and cast-in-place anchor bolts, one connector covers a wide range of project types without requiring a different product for each scenario
• Simplified installation without sacrificing strength - the rivet-free, washer-free design means fewer parts to source and fewer steps to complete, while the four-ply formed seat still provides the high tension capacity required for structural concrete-to-steel connections
• Built-in corrosion protection for challenging environments - the hot-dip galvanized finish makes this tie a practical choice for exterior framing and treated-wood construction where moisture exposure is a real concern over the life of the structure
• Engineered by a trusted structural connector brand - Simpson designs this heavy tension tie specifically for post-pour wood-to-concrete applications, giving contractors and builders a connector purpose-built for the load conditions these connections face

Specifications

• Model Number: HTT4HDG
• Gauge: 11
• Length: 12-3/8 in.
• Width: 2-1/2 in.
• Anchor Rod Diameter: 5/8 in.
• Coating: Hot-Dip Galvanized
• Finish: Hot-Dip Galvanized
• Country of Origin: United States

Approved Applications

• Post-pour, wood-to-concrete tension connections
• Exterior applications requiring enhanced corrosion resistance
• Treated-wood construction environments
• Retrofit installations using post-installed anchor bolts
• New construction using cast-in-place anchor bolts

Install With (sold separately)

• Install with (1) 5/8-in. anchor bolt AND (18) 0.148 x 1-1/2-in. nails, 0.162 x 2-1/2-in. nails, or #10 x 1-1/2-in. Strong-Drive SD Connector screws

Downloads and Resources

• Fasteners required. View Specifications

Frequently Asked Questions

What type of fasteners are required to install the HTT4HDG?

Installation requires (1) 5/8-in. anchor bolt AND (18) 0.148 x 1-1/2-in. nails, 0.162 x 2-1/2-in. nails, or #10 x 1-1/2-in. Strong-Drive SD Connector screws.

Is an anchor bolt washer required when installing the HTT4HDG?

No. The HTT4HDG is specifically designed so that anchor bolt washers are not required, simplifying the installation process.

Can the HTT4HDG be used in exterior or treated-wood applications?

Yes. The hot-dip galvanized (HDG) coating provides extra corrosion resistance, making the HTT4HDG well suited for exterior environments and treated-wood applications.

Is the HTT4HDG suitable for retrofit projects as well as new construction?

Yes. The HTT4HDG can be installed with either cast-in-place or post-installed anchor bolts, making it ideal for both retrofit and new construction projects.

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