The Simpson Strong-Bolt 2 Wedge Anchor is a 1 in. x 10 in. zinc-plated carbon steel wedge-type expansion anchor engineered for high-performance fastening in both cracked and uncracked concrete. Built by Simpson to meet the demands of structural connections in seismic and high-wind environments, this anchor relies on 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 if the hole expands. Tested per ACI355.2 and AC193, it is qualified for static and seismic loading conditions covering seismic design categories A through F, making it a reliable choice for contractors and engineers who require a code-compliant concrete anchor across a wide range of installation scenarios.

Key Features

• Chamfered top designed to prevent mushrooming during installation - protects the bolt head as it is driven into the hole, reducing the risk of installation damage and helping ensure a clean, secure set every time.
• Dual undercutting embossments on each clip segment enable secondary expansion - if a crack forms and intersects the anchor location, the anchor continues to expand and carry load rather than losing holding strength, a critical advantage in seismic applications.
• Qualified for static and seismic loading conditions, seismic design categories A through F - covers the full range of seismic design categories so the anchor meets code requirements on virtually any structural project, from low-risk zones to the most demanding high-seismic regions.
• Suitable for horizontal, vertical, and overhead applications - versatile orientation capability means one anchor solution handles ceiling, wall, and floor installations without requiring separate product selections.
• Tested per ACI355.2 and AC193 - independent, recognized standard testing gives engineers and inspectors the documentation they need to approve anchor use with confidence.
• Made from zinc-plated carbon steel - the zinc plating provides a corrosion-resistant barrier suited to interior and protected structural applications, extending service life in typical concrete fastening environments.

Why This Product

• Engineered for seismic and high-wind structural connections - the dual undercutting embossment design goes beyond standard wedge anchors by actively responding to concrete cracking, making this anchor a dependable choice where building codes demand seismic compliance across categories A through F.
• Fully assembled and ready to install - the anchor ships fully assembled with nut and washer in place, allowing installers to get straight to work with a 1 in. drill bit and 1 1/2 in. wrench without hunting for hardware components.
• Versatile enough to replace multiple anchor SKUs on a job site - approval for cracked and uncracked concrete, masonry, and horizontal, vertical, and overhead orientations means this single anchor covers a broad range of fastening conditions on the same project.
• Backed by Simpson's rigorous testing standards - ACI355.2 and AC193 test compliance provides the load data and evaluation reports that structural engineers and inspectors require, reducing approval friction and keeping projects on schedule.

Specifications

• Size: 1 in. x 10 in.
• MPN: STB2-1001000F4
• Brand: Simpson Strong-Tie
• Diameter: 1 in.
• Length: 10 in.
• Thread Length: 3-1/2 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 568
• Installation Drill Bit: 1 in.
• Wrench Size: 1-1/2 in.
• Packaging: Packs of 4 and Cartons of 8

Approved Applications

• Cracked and uncracked concrete applications
• Masonry applications
• Seismic design categories A through F
• High-wind structural connections
• Horizontal installations
• Vertical installations
• Overhead installations

Frequently Asked Questions

What makes the Strong-Bolt 2 suitable for seismic applications?

The Strong-Bolt 2 is qualified for static and seismic loading conditions covering seismic design categories A through F. Its dual undercutting embossments on each clip segment enable secondary expansion if a crack forms and intersects the anchor location, significantly increasing its ability to carry load should the hole expand during a seismic event.

What tools are needed to install this wedge anchor?

Installation requires a 1 in. drill bit to prepare the hole and a 1-1/2 in. wrench size to tighten the nut. The anchor's chamfered top is designed to prevent mushrooming of the bolt head during the installation process.

Is the Strong-Bolt 2 tested to any recognized standards?

Yes. The Strong-Bolt 2 has been tested per ACI355.2 and AC193, providing assurance of its performance in both cracked and uncracked concrete as well as masonry applications.

Can this anchor be used in orientations other than vertical?

Yes. The Strong-Bolt 2 is suitable for horizontal, vertical, and overhead applications, making it a versatile choice across a wide range of structural fastening scenarios.

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