Simpson Strong-Tie STB2 Strong-Bolt 2 Wedge Anchor

Code listed for cracked and uncracked concrete, and masonry applications, the Strong-Bolt 2 wedge-type expansion anchor is an optimal choice for high-performance even in seismic and high-wind conditions. 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.

• 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
• Qualified for minimum concrete thickness of 3 1/4", and lightweight concrete-over-steel deck thickness of 2 1/2" and 3 1/4"
• Standard (ANSI) fractional sizes: fits standard fixtures and installs with common drill bit and tool sizes
• Tested per ACI355.2 and AC193

Specifications (all models)

• Material: Carbon Steel
• Finish: Zinc Plated
• Component Material, Anchor Body: Carbon Steel
• Component Material, Nut: Carbon Steel ASTM A 563, Grade A
• Component Material, Washer: Carbon Steel ASTM F844

Available options (see each model for exact values)

• Length (in.): 1 3/4 to 13
• Diameter (in.): 1/4, 3/8, 1/2, 5/8, 3/4, 1
• Thread Length (in.): 1 to 6
• Threads per Inch: 10, 11, 13, 16
• Packaging Type: Box, Tub, Bag
• Drill Bit Diameter (in.): 1/4, 3/8, 1/2, 5/8, 3/4, 1
• Component Material, Clip: Carbon Steel ASTM A 568, Carbon Steel ASTM A 56
• Thread Pitch (mm): 3.18, 3.35, 3.63
• Thread Pitch (in.): 0.06, 0.08, 0.09, 0.1

Caution: Do not use an impact wrench to set or tighten the Strong-Bolt 2 anchor. Oversized holes in the base material will make it difficult to set the anchor and will reduce the anchor's load capacity.