The Simpson Strong-Bolt 2 Wedge Anchor, 3/4 in. x 6-1/4 in., Zinc Plated is a wedge-type expansion anchor engineered by Simpson for high-performance anchoring in even the most demanding seismic and high-wind conditions. Dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location, significantly increasing the ability of the Strong-Bolt 2 to carry load if the hole expands - making it a reliable choice for critical structural connections in both cracked and uncracked concrete. Tested per ACI355.2 and AC193, this carbon steel anchor delivers verified performance across horizontal, vertical, and overhead applications.

Key Features

• Chamfered top designed to prevent mushrooming during installation - protects the anchor and surrounding concrete during driving, helping ensure a clean, properly seated connection every time.
• Dual undercutting embossments on each clip segment - enable secondary expansion if a crack intersects the anchor location, maintaining load-carrying capacity in cracked concrete where conventional anchors may fall short.
• Qualified for static and seismic loading conditions, seismic design categories A through F - gives engineers and contractors confidence to specify this anchor on projects in the highest-risk seismic zones without seeking an alternative product.
• Suitable for horizontal, vertical, and overhead applications - one anchor covers a wide range of installation orientations, reducing the need to stock multiple anchor types on a job site.
• Tested per ACI355.2 and AC193 - independent, recognized testing standards back every performance claim, supporting code compliance and simplifying the approval process on inspected projects.
• Made from zinc-plated carbon steel - the zinc plating provides a layer of corrosion resistance suitable for standard interior and protected concrete anchoring environments.

Why This Product

• Built for seismic and high-wind environments - unlike basic wedge anchors, the Strong-Bolt 2 is specifically qualified for seismic design categories A through F, making it one of the few expansion anchors appropriate for structural connections in high-risk seismic regions.
• Secondary expansion technology protects load capacity in cracked concrete - the dual undercutting embossments on each clip segment allow the anchor to re-engage if the concrete cracks at the anchor location, a critical safety advantage in real-world conditions where concrete integrity cannot always be guaranteed.
• Versatile installation orientations reduce complexity - approval for horizontal, vertical, and overhead use means contractors can rely on a single anchor solution across multiple connection types on the same project, streamlining purchasing and inventory.
• Third-party tested performance you can document - with testing conducted per ACI355.2 and AC193, the Strong-Bolt 2 comes backed by recognized industry standards, making it easier to satisfy inspectors, engineers, and building officials on code-governed construction.

Specifications

• Size: 3/4 in. x 6-1/4 in.
• MPN: STB2-75614F10
• Brand: Simpson Strong-Tie
• Diameter: 3/4 in.
• Length: 6-1/4 in.
• Thread Length: 3-15/16 in.
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Installation: Installs with 3/4 in. drill bit and 1-1/8 in. wrench size
• Packaging: Packs of 10 and Cartons of 40
• Drill Bit Diameter: 3/4 in.

Approved Applications

• Horizontal anchoring applications
• Vertical anchoring applications
• Overhead anchoring applications
• Seismic design categories A through F
• Static and seismic loading conditions
• Cracked and uncracked concrete environments

Frequently Asked Questions

What seismic design categories is the Strong-Bolt 2 qualified for?

The Strong-Bolt 2 is qualified for static and seismic loading conditions covering seismic design categories A through F, making it suitable for use in the most demanding seismic environments.

What testing standards has this wedge anchor been tested to?

The Strong-Bolt 2 has been tested per ACI355.2 and AC193, ensuring it meets recognized industry standards for performance and reliability in concrete anchoring applications.

What tools are needed to install the STB2-75614F10?

Installation requires a 3/4 in. drill bit to prepare the hole and a 1-1/8 in. wrench size to tighten the anchor during installation.

What makes the Strong-Bolt 2 perform well in cracked concrete?

Dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location; this feature significantly increases the ability of Strong-Bolt 2 to carry load if the hole expands.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.