The Simpson Strong-Bolt 2 Wedge Anchor is a 1 in. x 7 in. fully assembled wedge-type expansion anchor engineered for high-performance structural connections in the most demanding conditions, including seismic and high-wind environments. Built from zinc-plated carbon steel, this anchor 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. Tested per ACI355.2 and AC193 and qualified for cracked and uncracked concrete as well as masonry applications across seismic design categories A through F, the Strong-Bolt 2 delivers the reliability and code compliance that structural professionals require in critical installations.

Key Features

• Chamfered top - prevents mushrooming during installation, protecting thread integrity and making post-installation fastening straightforward.
• Dual undercutting embossments on each clip segment - enable secondary expansion if a crack intersects the anchor location, maintaining load-carrying capacity even when concrete conditions change.
• Qualified for seismic design categories A through F - gives engineers and contractors the confidence to use this anchor on projects subject to the strictest seismic code requirements without additional qualification work.
• Suitable for horizontal, vertical, and overhead applications - provides installation flexibility across a wide range of structural connection orientations on a single jobsite.
• Tested per ACI355.2 and AC193 - meets recognized industry standards for mechanical anchors in concrete, supporting code-compliant submittals and inspections.
• Zinc-plated carbon steel construction - provides a corrosion-resistant finish appropriate for interior structural applications, with additional material options available for more aggressive environments.
• Fully assembled and ready to install with a 1 in. drill bit and 1 1/2 in. wrench - reduces jobsite prep time and eliminates the need to source separate components before installation begins.

Why This Product

• Built for seismic and high-wind structural demands - the Strong-Bolt 2 is specifically qualified for static and seismic loading across all seismic design categories, making it a dependable choice for structural anchoring in regions where wind and seismic performance are non-negotiable.
• Secondary expansion technology protects load capacity after cracking - unlike standard wedge anchors, the dual undercutting embossments allow the anchor to expand a second time if the surrounding concrete cracks, reducing the risk of load loss at the anchor point.
• Versatile enough for virtually any concrete or masonry anchoring application - approved for cracked and uncracked concrete, masonry, and installations in any orientation, this expansion anchor adapts to the varied demands of structural, commercial, and industrial projects.
• Arrives fully assembled and ready for immediate use - the complete, pre-assembled package means installers can go straight from the box to the drill without assembling components on site, helping keep projects on schedule.

Specifications

• Size: 1 in. x 7 in.
• MPN: STB2-100700F4
• Brand: Simpson Strong-Tie
• Diameter: 1 in.
• Length: 7 in.
• Thread Length: 3-1/2 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
• Installation: Installs with 1 in. drill bit and 1-1/2 in. wrench size
• Packaging: Packs of 4 and Cartons of 16
• Drill Bit Diameter: 1 in.

Approved Applications

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

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 use in the most demanding seismic zones.

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

The Strong-Bolt 2 has been tested per ACI355.2 and AC193, ensuring compliance with recognized industry standards for mechanical anchors in concrete.

What tools are needed to install the STB2-100700F4?

Installation requires a 1 in. drill bit to prepare the hole and a 1-1/2 in. wrench to torque the anchor to its specified setting.

How does the Strong-Bolt 2 perform if a crack develops at the anchor location?

Dual undercutting embossments on each clip segment enable secondary expansion should a crack form and intersect the anchor location; this feature significantly increases the ability of Strong-Bolt 2 to carry load if the hole expands.

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