Product Features
Product Description
Simpson STB2-50700F25 Strong-Bolt 2 - 1/2 in. x 7 in. Wedge Anchor, Zinc Plated is a high-performance wedge-type expansion anchor engineered by Simpson Strong-Tie for demanding structural connections in concrete and masonry. Designed to excel in seismic and high-wind conditions, 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 - significantly increasing the anchor's ability to carry load if the hole expands. Made from zinc-plated carbon steel, this anchor delivers reliable holding power across static and seismic loading scenarios in cracked and uncracked concrete alike.
Key Features
- Code listed for cracked and uncracked concrete, and masonry applications
- Chamfered top designed to prevent mushrooming during installation
- Qualified for static and seismic loading conditions (seismic design categories A through F)
- Suitable for horizontal, vertical and overhead applications
- Dual undercutting embossments on each clip segment enable secondary expansion if a crack intersects the anchor location, significantly increasing load-carrying ability when the hole expands
- Tested per ACI355.2 and AC193
- Made from zinc-plated carbon steel
- Installs with 1/2 in. drill bit and 3/4 in. wrench size
Specifications
- MPN: STB2-50700F25
- Brand: Simpson Strong-Tie
- Material: Carbon Steel
- Coating / Finish: Zinc Plated
- Anchor Diameter: 1/2 in.
- Anchor Length: 7 in.
- Thread Length: 5 5/16 in.
- Installation Drill Bit: 1/2 in.
- Wrench Size: 3/4 in.
- Packaging: Packs of 25 and Cartons of 100
- Country of Origin: China
Approved Applications
- Cracked concrete
- Uncracked concrete
- Masonry
- Horizontal installations
- Vertical installations
- Overhead installations
- Seismic design categories A through F
- High-wind structural connections
Frequently Asked Questions
- Is the Strong-Bolt 2 approved for use in cracked concrete?
- Yes. The Strong-Bolt 2 is code listed for both cracked and uncracked concrete, as well as masonry applications. Its dual undercutting embossments enable secondary expansion if a crack forms and intersects the anchor location, maintaining load-carrying capacity even when the hole expands.
- 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 - the full range - making it suitable for projects in the most demanding seismic zones.
- What tools are needed to install the STB2-50700F25?
- Installation requires a 1/2 in. drill bit to bore the hole and a 3/4 in. wrench to tighten the nut. The chamfered top of the anchor is designed to prevent mushrooming during the installation process.
- What testing standards has the Strong-Bolt 2 been evaluated under?
- The Strong-Bolt 2 has been tested per ACI355.2 and AC193, the industry-recognized standards for mechanical anchors in concrete, ensuring its performance ratings are backed by rigorous third-party evaluation protocols.
Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.
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