The Simpson Strong-Bolt 2 Wedge Anchor, 1/2 in. x 12 in., Zinc Plated is a wedge-type expansion anchor engineered by Simpson for high-performance structural anchoring in concrete. Built to perform reliably under seismic and high-wind conditions, it incorporates dual undercutting embossments on each clip segment that enable secondary expansion should a crack form and intersect the anchor location - significantly increasing the anchor's ability to carry load if the hole expands. Tested per ACI355.2 and AC193, this carbon steel anchor is a dependable solution for contractors and engineers who require code-compliant performance across a wide range of anchoring scenarios.

Key Features

• Chamfered top design - prevents mushrooming during installation, making the anchor easier to drive and set cleanly without damaging the fastener head.
• Qualified for static and seismic loading conditions (seismic design categories A through F) - meets the broadest range of code requirements, giving engineers and inspectors confidence on regulated job sites.
• Dual undercutting embossments on each clip segment - enable secondary expansion if a crack intersects the anchor location, maintaining load-carrying capacity in cracked concrete.
• Suitable for horizontal, vertical, and overhead applications - provides installation flexibility so one anchor works across multiple orientations on the same project.
• Tested per ACI355.2 and AC193 - independently verified against recognized industry test standards, supporting use in code-required and inspected structural applications.
• Zinc-plated carbon steel construction - delivers a corrosion-resistant finish appropriate for interior and protected concrete anchoring applications.
• Installs with a 1/2 in. drill bit and 3/4 in. wrench - straightforward tooling requirements mean no specialized equipment is needed for a standard installation.

Why This Product

• Built for demanding seismic and high-wind environments - the Strong-Bolt 2 is qualified across all seismic design categories (A through F), making it one of the more versatile concrete wedge anchors available for projects with strict structural loading requirements.
• Secondary expansion protects load capacity in cracked concrete - the dual undercutting embossments on each clip segment activate if the concrete cracks at the anchor point, a critical safety advantage in dynamic or unpredictable load conditions.
• Verified performance backed by recognized test standards - compliance with ACI355.2 and AC193 means the anchor's rated performance is documented and defensible, simplifying approval on engineered and inspected projects.
• Versatile orientation support reduces the need for multiple anchor types - approved for horizontal, vertical, and overhead concrete anchoring, the Strong-Bolt 2 adapts to varied installation positions without requiring a different product for each application.

Specifications

• MPN: STB2-501200R10
• Brand: Simpson Strong-Tie
• Diameter: 1/2 in.
• Length: 12 in.
• Material: Carbon Steel
• Coating: Zinc Plated
• Finish: Zinc Plated
• Installation: Installs with 1/2 in. drill bit and 3/4 in. wrench size
• Packaging: Packs of 10 and Cartons of 50
• Drill Bit Diameter: 1/2 in.

Approved Applications

• Static loading conditions in concrete
• Seismic loading conditions - seismic design categories A through F
• High-wind structural anchoring applications
• Horizontal, vertical, and overhead installations
• Cracked and uncracked concrete applications

Frequently Asked Questions

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

The Strong-Bolt 2 is qualified for both static and seismic loading conditions, covering seismic design categories A through F. Its dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location, significantly increasing the anchor's ability to carry load if the hole expands - a critical advantage in seismic and high-wind environments.

What drill bit and wrench size are required to install this anchor?

The Strong-Bolt 2 1/2 in. x 12 in. wedge anchor installs with a 1/2 in. drill bit and requires a 3/4 in. wrench size for tightening.

Can this anchor be used in overhead or horizontal installations?

Yes. The Strong-Bolt 2 is suitable for horizontal, vertical, and overhead applications, providing installation flexibility across a wide range of structural anchoring scenarios.

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 and safety standards for anchoring in concrete under both static and seismic loading conditions.

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