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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.

Key Features

  • 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

Material

  • Zinc-plated carbon steel

Installation

  1. Drill a hole in the base material using a carbide drill bit the same diameter as the nominal diameter of the anchor to be installed. Drill the hole to the specified minimum hole depth, and blow it clean using compressed air. (Overhead installations need not be blown clean.) Alternatively, drill the hole deep enough to accommodate embedment depth and dust from drilling.
  2. Assemble the anchor with nut and washer so the top of the nut is flush with the top of the anchor. Place the anchor in the fixture, and drive it into the hole until the washer and nut are tight against the fixture.
  3. Tighten to the required installation torque.
Strong-Bolt 2 Diameter (in.) Drill Bit Size (in.) Min. Fixture Hole (in.) Wrench Size (in.) Concrete Installation Torque (ft.-lbf.) Carbon Steel Concrete Installation Torque (ft.-lbf.) Stainless Steel
1/4 1/4 5/16 7/16 4 4
3/8 3/8 7/16 9/16 30 30
1/2 1/2 9/16 3/4 60 65
5/8 5/8 11/16 15/16 90 80
3/4 3/4 7/8 1 1/8 150 150
1 1 1 1/8 1 1/2 230 -

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

Related Literature

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2022–2025 Product Guide — Anchoring, Fastening Systems and Restoration Solutions for Concrete and Masonry
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2022–2025 Guía de productos — Sistemas de anclaje, sujeción, restauración y fortalecimiento para concreto y mampostería
S-A-PG22SP
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Wedge-All® Mechanically Galvanized to Strong-Bolt® 2 Mechanically Galvanized Wedge Anchor Conversion Reference Table
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Seismic Retrofit Guide for Raised Foundations
F-SEISRETRGD19
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ASCE 41 Values
TEB-ASCE4124
Connector and anchor Strength Design capacities for retrofits designed in accordance with ASCE 41.
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Canadian Addendum for 2023 Anchor Catalogue
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This technical engineering bulletin for Canada, TEBC-A-2023, provides a supplement to the Anchoring, Fastening and Restoration Systems for Concrete and Masonry catalog, C-A-2023.
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Intended to provide information for use in workplace chemical management; information such as physical properties; hazards; protective measures; precautions for handling, storing, and transportation.
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Ficha de Datos de Seguridad para Anclas Mecánicas
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Simpson Strong-Tie® Suggested General Notes for Anchor Products (.docx)
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MasterFormat® Specification
Simpson Strong-Tie® Suggested General Notes for Anchor Products (PDF)
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Product Information Table

Fastener Production Information and Stuff & Things
Model No. Coating/Material Size (in.) Drill Bit Dia. (in.) Thread Length (in.) Component Material, Anchor Body Component Material, Nut Component Material, Washer Component Material, Clip Packaging Qty.
Footnotes
  1. Models STB2-25134, STB2-37214, STB2-50234, STB2-75434 and STB2-62312 do not meet minimum embedment in code report.
STB2-1001000 Zinc Plated / Carbon Steel 1 x 10 1 3 1/2 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 5
STB2-1001300 Zinc Plated / Carbon Steel 1 x 13 1 3 1/2 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 5
STB2-100700 Zinc Plated / Carbon Steel 1 x 7 1 3 1/2 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 5
STB2-25134 Zinc Plated / Carbon Steel 1/4 x 1 3/4 1/4 1 5/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 100
STB2-25214 Zinc Plated / Carbon Steel 1/4 x 2 1/4 1/4 1 7/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 100
STB2-25314 Zinc Plated / Carbon Steel 1/4 x 3 1/4 1/4 2 7/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 100
STB2-37214R50 Zinc Plated / Carbon Steel 3/8 x 2 1/4 3/8 1 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 50
STB2-37234 Zinc Plated / Carbon Steel 3/8 x 2 3/4 3/8 1 5/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 50
STB2-37300 Zinc Plated / Carbon Steel 3/8 x 3 3/8 1 9/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 50
STB2-37312 Zinc Plated / Carbon Steel 3/8 x 3 1/2 3/8 2 1/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 50
STB2-37334 Zinc Plated / Carbon Steel 3/8 x 3 3/4 3/8 2 5/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 50
STB2-37500 Zinc Plated / Carbon Steel 3/8 x 5 3/8 3 9/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 50
STB2-37700 Zinc Plated / Carbon Steel 3/8 x 7 3/8 5 9/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 50
STB2-50100 Zinc Plated / Carbon Steel 1/2 x 10 1/2 6 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 25
STB2-50234R25 Zinc Plated / Carbon Steel 1/2 x 2 3/4 1/2 1 1/4 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 25
STB2-50334 Zinc Plated / Carbon Steel 1/2 x 3 3/4 1/2 2 1/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 25
STB2-50414 Zinc Plated / Carbon Steel 1/2 x 4 1/4 1/2 2 9/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 25
STB2-50434 Zinc Plated / Carbon Steel 1/2 x 4 3/4 1/2 3 1/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 25
STB2-50512 Zinc Plated / Carbon Steel 1/2 x 5 1/2 1/2 3 13/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 25
STB2-50700 Zinc Plated / Carbon Steel 1/2 x 7 1/2 5 5/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 25
STB2-50812 Zinc Plated / Carbon Steel 1/2 x 8 1/2 1/2 6 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 25
STB2-62100 Zinc Plated / Carbon Steel 5/8 x 10 5/8 6 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 10
STB2-62312R20 Zinc Plated / Carbon Steel 5/8 x 3 1/2 5/8 1 5/8 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 20
STB2-62412 Zinc Plated / Carbon Steel 5/8 x 4 1/2 5/8 2 7/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 20
STB2-62500 Zinc Plated / Carbon Steel 5/8 x 5 5/8 2 15/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 20
STB2-62600 Zinc Plated / Carbon Steel 5/8 x 6 5/8 3 15/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 20
STB2-62700 Zinc Plated / Carbon Steel 5/8 x 7 5/8 4 15/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 20
STB2-62812 Zinc Plated / Carbon Steel 5/8 x 8 1/2 5/8 6 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 20
STB2-75100 Zinc Plated / Carbon Steel 3/4 x 10 3/4 6 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 10
STB2-75100P1 Zinc Plated / Carbon Steel 3/4 x 10 3/4 6 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 1
STB2-751200R5 Zinc Plated / Carbon Steel 3/4 x 12 3/4 6 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 56 5
STB2-75434R10 Zinc Plated / Carbon Steel 3/4 x 4 3/4 3/4 2 5/8 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 10
STB2-75512 Zinc Plated / Carbon Steel 3/4 x 5 1/2 3/4 3 3/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 10
STB2-75512P1 Zinc Plated / Carbon Steel 3/4 x 5 1/2 3/4 3 3/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 1
STB2-75614 Zinc Plated / Carbon Steel 3/4 x 6 1/4 3/4 3 15/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 10
STB2-75700 Zinc Plated / Carbon Steel 3/4 x 7 3/4 4 11/16 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 10
STB2-75812 Zinc Plated / Carbon Steel 3/4 x 8 1/2 3/4 6 Carbon Steel Carbon Steel ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568 10

Product Information Tables

Strong-Bolt® 2 Anchor Product Data
Size (in.) Carbon Steel Model No. Type 304 Stainless Steel Model No. Type 316 Stainless Steel Model No. Drill Bit Dia. (in.) Thread Length (in.) Quantity
Box Carton
1/4 x 1 3/4 STB2-25134 STB2-251344SS STB2-251346SS 1/4 15/16 100 500
1/4 x 2 1/4 STB2-25214 STB2-252144SS STB2-252146SS 1/4 1 7/16 100 500
1/4 x 3 1/4 STB2-25314 STB2-253144SS STB2-253146SS 1/4 2 7/16 100 500
3/8 x 2 3/4 STB2-37234 STB2-372344SS STB2-372346SS 3/8 1 5/16 50 250
3/8 x 3 STB2-37300 STB2-373004SS STB2-373006SS 3/8 1 9/16 50 250
3/8 x 3 1/2 STB2-37312 STB2-373124SS STB2-373126SS 3/8 2 1/16 50 250
3/8 x 3 3/4 STB2-37334 STB2-373344SS STB2-373346SS 3/8 2 5/16 50 250
3/8 x 5 STB2-37500 STB2-375004SS STB2-375006SS 3/8 3 9/16 50 200
3/8 x 7 STB2-37700 STB2-377004SS STB2-377006SS 3/8 5 9/16 50 200
1/2 x 3 3/4 STB2-50334 STB2-503344SS STB2-503346SS 1/2 2 1/16 25 125
1/2 x 4 1/4 STB2-50414 STB2-504144SS STB2-504146SS 1/2 2 9/16 25 100
1/2 x 4 3/4 STB2-50434 STB2-504344SS STB2-504346SS 1/2 3 1/16 25 100
1/2 x 5 1/2 STB2-50512 STB2-505124SS STB2-505126SS 1/2 3 13/16 25 100
1/2 x 7 STB2-50700 STB2-507004SS STB2-507006SS 1/2 5 5/16 25 100
1/2 x 8 1/2 STB2-50812 STB2-508124SS STB2-508126SS 1/2 6 25 50
1/2 x 10 STB2-50100 STB2-501004SS STB2-501006SS 1/2 6 25 50
5/8 x 4 1/2 STB2-62412 STB2-624124SS STB2-624126SS 5/8 2 7/16 20 80
5/8 x 5 STB2-62500 STB2-625004SS STB2-625006SS 5/8 2 15/16 20 80
5/8 x 6 STB2-62600 STB2-626004SS STB2-626006SS 5/8 3 15/16 20 80
5/8 x 7 STB2-62700 STB2-627004SS STB2-627006SS 5/8 4 15/16 20 80
5/8 x 8 1/2 STB2-62812 STB2-628124SS STB2-628126SS 5/8 6 20 40
5/8 x 10 STB2-62100 STB2-621004SS STB2-621006SS 5/8 6 10 20
3/4 x 5 1/2 STB2-75512 STB2-755124SS STB2-755126SS 3/4 3 3/16 10 40
3/4 x 6 1/4 STB2-75614 STB2-756144SS STB2-756146SS 3/4 3 15/16 10 40
3/4 x 7 STB2-75700 STB2-757004SS STB2-757006SS 3/4 4 11/16 10 40
3/4 x 8 1/2 STB2-75812 STB2-758124SS STB2-758126SS 3/4 6 10 20
3/4 x 10 STB2-75100 — — 3/4 6 10 20
1 x 7 STB2-100700 — — 1 3 1/2 5 20
1 x 10 STB2-1001000 — — 1 3 1/2 5 10
1 x 13 STB2-1001300 — — 1 3 1/2 5 10
Design requirements, dimensional data and installation information published in the C-A-2016 Simpson Strong-Tie Anchoring and Fastening Systems catalog for the Type 316 stainless-steel Strong-Bolt 2 wedge anchor applies to the Type 304 stainless-steel Strong-Bolt 2 wedge anchor for all diameters with the exception that the installation torque for the 1/2" stainless-steel Strong-Bolt 2 wedge anchor is 65 ft.-lb.
Material Specifications
Anchor Body Nut Washer Clip
Carbon Steel1 Carbon Steel, ASTM A 563, Grade A Carbon Steel ASTM F844 Carbon Steel ASTM A 568
Type 304 Stainless Steel Type 304 Stainless Steel Type 304 Stainless Steel Type 304 Stainless Steel or Type 316 Stainless Steel
Type 316 Stainless Steel Type 316 Stainless Steel Type 316 Stainless Steel Type 316 Stainless Steel
1. Zinc meets ASTM B 633, Class SC 1 (Fe / Zn 5), Type III.
Strong-Bolt® 2 Anchor Installation Data
Strong-Bolt 2 Dia. (in.) 1/4 3/8 1/2 5/8 3/4 1
Drill Bit Size (in.) 1/4 3/8 1/2 5/8 3/4 1
Min. Fixture Hole (in.) 5/16 7/16 9/16 11/16 7/8 1 1/8
Wrench Size (in.) 7/16 9/16 3/4 15/16 1 1/8 1 1/2
Length Identification Head Marks on Strong-Bolt® 2 Wedge Anchors (corresponds to length of anchor – inches)
Mark Units A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
From in. 1 1/2 2 2 1/2 3 3 1/2 4 4 1/2 5 5 1/2 6 6 1/2 7 7 1/2 8 8 1/2 9 9 1/2 10 11 12 13 14 15 16 17 18
Up To But Not Including in. 2 2 1/2 3 3 1/2 4 4 1/2 5 5 1/2 6 6 1/2 7 7 1/2 8 8 1/2 9 9 1/2 10 11 12 13 14 15 16 17 18 19

Code Reports & Compliance

Drawings

PDF DWG DXF RFA IFC SAT

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