The Simpson Strong-Bolt 2 3/4 in. x 12 in. Wedge Anchor is a heavy-duty wedge-type expansion anchor engineered by Simpson for high-performance anchoring in cracked and uncracked concrete as well as masonry. Built to maintain holding power under seismic and high-wind conditions, this anchor uses dual undercutting embossments on each clip segment to enable secondary expansion should a crack form and intersect the anchor location - significantly increasing its ability to carry load even if the hole expands. Made from zinc-plated carbon steel and tested per ACI355.2 and AC193, it is a dependable solution for structural anchoring in demanding environments.

Key Features

• Chamfered top - prevents mushrooming during installation, keeping the anchor surface clean and flush for a secure, professional finish.
• Dual undercutting embossments on each clip segment - enable secondary expansion if a crack intersects the anchor location, maintaining load-carrying capacity in compromised concrete.
• Qualified for static and seismic loading conditions (seismic design categories A through F) - provides confidence for structural applications across the full range of seismic risk zones, including high-wind environments.
• Suitable for horizontal, vertical, and overhead applications - gives installers flexibility to use a single anchor type across multiple orientations and job site conditions.
• Tested per ACI355.2 and AC193 - independently verified performance means you can trust the anchor meets rigorous benchmarks for wedge-type expansion anchors in concrete and masonry.
• Installs with a 3/4 in. drill bit and 1-1/8 in. wrench size - straightforward tooling requirements speed up installation and reduce the chance of errors on the job.
• Made from zinc-plated carbon steel - the zinc plating provides a corrosion-resistant finish suited for a wide range of interior and protected concrete anchoring applications.

Why This Product

• Built for seismic and high-wind zones - with qualification across seismic design categories A through F, this wedge anchor is appropriate for structurally demanding projects where standard anchors may fall short.
• Secondary expansion protects your connection - the dual undercutting embossments on each clip segment allow the anchor to continue performing if the concrete cracks at the anchor point, reducing the risk of sudden load loss in real-world conditions.
• Verified to recognized testing standards - ACI355.2 and AC193 testing gives engineers and contractors documented performance data to support code-compliant designs in cracked and uncracked concrete applications.
• Versatile installation for multiple applications - approved for horizontal, vertical, and overhead use in both concrete and masonry, this anchor simplifies procurement when a single project calls for anchoring in more than one orientation.

Specifications

• Size: 3/4 in. x 12 in.
• MPN: STB2-751200R5
• Brand: Simpson Strong-Tie
• Diameter: 3/4 in.
• Length: 12 in.
• Thread Length: 6 in.
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Anchor Body Material: Carbon Steel
• Nut Material: Carbon Steel ASTM A 563, Grade A
• Washer Material: Carbon Steel ASTM F844
• Clip Material: Carbon Steel ASTM A 56
• Drill Bit Required: 3/4 in.
• Wrench Size: 1-1/8 in.
• Packaging: Packs of 5 and Cartons of 50

Approved Applications

• Cracked and uncracked concrete applications
• Masonry applications
• Horizontal installations
• Vertical installations
• Overhead installations
• Seismic design categories A through F
• High-wind condition 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 the full range of seismic risk zones.

What standards has the Strong-Bolt 2 been tested to?

The Strong-Bolt 2 has been tested per ACI355.2 and AC193, ensuring it meets rigorous performance benchmarks for wedge-type expansion anchors in concrete and masonry.

What tools are needed to install the Strong-Bolt 2 wedge anchor?

Installation requires a 3/4 in. drill bit to prepare the hole and a 1-1/8 in. wrench size to tighten the anchor. The chamfered top is designed to prevent mushrooming during the installation process.

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

The Strong-Bolt 2 features dual undercutting embossments on each clip segment that enable secondary expansion should a crack form and intersect the anchor location. This significantly increases the anchor's ability to carry load if the hole expands, making it code-listed for both cracked and uncracked concrete.

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