The Simpson Strong-Bolt 2 Wedge Anchor, 1/2 in. x 10 in. is a fully assembled wedge-type expansion anchor built for high-performance concrete anchoring in demanding structural and construction applications. Manufactured from zinc-plated carbon steel, it delivers dependable holding power in both cracked and uncracked concrete, and is engineered to maintain load capacity even under seismic and high-wind conditions. Whether used in vertical, horizontal, or overhead orientations, this anchor is a reliable fastening solution for professionals who need proven performance backed by rigorous testing standards.

Key Features

• Chamfered top design - prevents mushrooming during installation, keeping the anchor intact and properly seated for a clean, secure fit every time.
• Dual undercutting embossments on each clip segment - enable secondary expansion should a crack form and intersect the anchor location, significantly increasing the ability to carry load if the hole expands in cracked concrete conditions.
• Qualified for static and seismic loading (seismic design categories A through F) - confirms suitability for the full range of seismic zones and high-wind environments, supporting code-compliant installations in critical structures.
• Suitable for horizontal, vertical, and overhead applications - provides installation flexibility across a wide variety of structural anchoring scenarios without requiring a different fastener for each orientation.
• Tested per ACI 355.2 and AC193 - meets recognized industry testing standards, giving engineers and contractors confidence in performance data and code acceptance.
• Zinc-plated carbon steel construction - provides a protective finish that resists corrosion in standard interior and dry applications, extending the service life of the anchor.
• Fully assembled out of the package - saves time on the job site by eliminating pre-assembly steps, allowing crews to drive straight to installation.

Why This Product

• Built for cracked concrete without sacrificing load capacity - the dual undercutting embossments on each clip segment trigger secondary expansion when a crack intersects the anchor, making this a dependable choice for concrete structures where cracking is possible.
• Seismic and high-wind qualified across every design category - coverage from seismic design categories A through F means this anchor meets the requirements for virtually any geographic region or project specification, reducing the need to source multiple anchor types.
• Versatile installation in any orientation - approved for horizontal, vertical, and overhead use, this wedge anchor adapts to the demands of complex structural projects without requiring application-specific substitutes.
• Straightforward installation with standard tooling - installs with a 1/2 in. drill bit and a 3/4 in. wrench, meaning crews can complete the job with common tools already on hand, reducing setup time and equipment overhead.

Specifications

• Size: 1/2 in. x 10 in.
• Brand: Simpson Strong-Tie
• MPN: STB2-50100F20
• Diameter: 1/2 in.
• Length: 10 in.
• Thread Length: 6 in.
• Material: Carbon Steel
• Coating / 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
• Assembly: Fully Assembled
• Installation: Installs with 1/2 in. drill bit and 3/4 in. wrench size
• Packaging: Packs of 20 and Cartons of 40
• Drill Bit Diameter: 1/2 in.

Approved Applications

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

Frequently Asked Questions

What drill bit size is required to install the Strong-Bolt 2?

The Strong-Bolt 2 STB2-50100F20 installs with a 1/2 in. drill bit and requires a 3/4 in. wrench size for tightening.

Is this anchor suitable for use in seismic zones?

Yes. The Strong-Bolt 2 is qualified for static and seismic loading conditions, covering seismic design categories A through F, making it appropriate for high-wind and seismic environments.

Can this anchor be used in cracked concrete?

Yes. The Strong-Bolt 2 is code listed for both cracked and uncracked concrete. Its dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location, significantly increasing its ability to carry load if the hole expands.

What orientations are supported for this wedge anchor?

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

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