The Simpson Strong-Bolt 2 Wedge Anchor is a wedge-type expansion anchor engineered for high-performance concrete and masonry fastening in the most demanding structural conditions. Built from zinc-plated carbon steel and arriving fully assembled, this anchor delivers reliable holding power across horizontal, vertical, and overhead installations - including applications subject to seismic forces and high-wind loading. 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. Tested per ACI355.2 and AC193, the Strong-Bolt 2 is a trusted solution for engineers and contractors who require code-compliant performance in both cracked and uncracked concrete.

Key Features

• Chamfered top designed to prevent mushrooming during installation - protects the anchor head during driving so threads remain clean and fastening integrity is maintained from the start.
• Qualified for static and seismic loading conditions (seismic design categories A through F) - gives installers confidence that the anchor meets code requirements across the full range of seismic risk zones.
• Dual undercutting embossments on each clip segment enable secondary expansion - if a crack intersects the anchor location, the mechanism re-engages to sustain load, reducing the risk of anchor failure in compromised concrete.
• Suitable for horizontal, vertical, and overhead applications - provides versatile placement options so a single anchor solution works across varied structural configurations on the same job site.
• Tested per ACI355.2 and AC193 - independent testing to recognized industry standards supports submittal and approval processes on engineered projects.
• Installs with a 1 in. drill bit and 1 1/2 in. wrench size - straightforward tooling requirements keep installation efficient and reduce the chance of mismatched hardware on site.
• Fully assembled and zinc-plated carbon steel construction - arrives ready to install with corrosion-resistant finish, saving prep time and providing durability in standard interior and protected structural environments.

Why This Product

• Built for seismic and high-wind reliability - the Strong-Bolt 2 is specifically qualified for seismic design categories A through F, making it one of the few wedge anchors suited for the most stringent code-required structural conditions without substitution or special engineering workarounds.
• Self-compensating expansion in cracked concrete - the dual undercutting embossments actively respond if the concrete cracks at the anchor point, maintaining load-carrying capacity where a standard expansion anchor would simply lose grip.
• Verified by independent testing standards - compliance with both ACI355.2 and AC193 means the performance data is backed by recognized test protocols, simplifying specification approval and inspector sign-off on commercial and structural projects.
• Flexible installation orientations - approved for horizontal, vertical, and overhead use, this expansion anchor adapts to the full range of concrete fastening tasks - from sill plate anchoring to overhead MEP support - without requiring a different product for each orientation.

Specifications

• Size: 1 in. x 13 in.
• MPN: STB2-1001300F4
• Brand: Simpson Strong-Tie
• Material: Carbon Steel
• Coating/Finish: Zinc Plated
• Diameter: 1 in.
• Length: 13 in.
• Thread Length: 3-1/2 in.
• 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 8
• Drill Bit Diameter: 1 in.

Approved Applications

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

Frequently Asked Questions

What makes the Strong-Bolt 2 suitable for seismic 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. This significantly increases the anchor's ability to carry load if the hole expands, making it qualified for static and seismic loading conditions in seismic design categories A through F.

What tools are needed to install the Strong-Bolt 2?

The Strong-Bolt 2 installs with a 1 in. drill bit and requires a 1-1/2 in. wrench size for tightening. The chamfered top is specifically designed to prevent mushrooming during installation.

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

The Strong-Bolt 2 has been tested per ACI355.2 and AC193, and is code listed for cracked and uncracked concrete as well as masonry applications.

Can the Strong-Bolt 2 be used in overhead applications?

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

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