Stud Type Mechanical Expansion Anchors (MEA)
Last edit date: 11/4/2022
| MEA Diameter |
Type(3) | Manufacturer | Product Name | Material Type | ESR (4) | Stud Diameter |
Anchor Length (5) |
hef (3) | Tinst (2),(3),(6) | BABA Act Information* |
|---|---|---|---|---|---|---|---|---|---|---|
| 3/8" | W | Dewalt | Power-Stud + SD4/SD6 Anchor | Stainless Steel | 2502 | 3/8" | 2-3/4" | 1-1/2" | 25 ft-lbs | Unconfirmed |
| W | Hilti Corporation North America | Kwik Bolt TZ | Stainless Steel | 1917 | 3/8" | 3" | 2" | 25 ft-lbs | Unconfirmed | |
| W | Hilti Corporation North America | Kwik Bolt TZ2 | Stainless Steel | 4266 | 3/8" | 3" | 2" | 30 ft-lbs | Unconfirmed | |
| 3-1/2" | 2-1/2" | |||||||||
| W | Simpson Strong Tie | Strong-Bolt 2 | Stainless Steel | 3037 | 3/8" | 2-3/4" | 1-1/2" | 30 ft-lbs | Unconfirmed | |
| 3-1/2" | 2-1/2" | |||||||||
| 1/2" | W | Dewalt | Power-Stud + SD4/SD6 Anchor | Stainless Steel | 2502 | 1/2" | 3-3/4" | 2" | 40 ft-lbs | Unconfirmed |
| W | Hilti Corporation North America | Kwik Bolt TZ | Stainless Steel | 1917 | 1/2" | 3-3/4" | 2" | 40 ft-lbs | Unconfirmed | |
| 5-1/2" | 3-1/4" | |||||||||
| W | Hilti Corporation North America | Kwik Bolt TZ2 | Stainless Steel | 4266 | 1/2" | 3-3/4" | 2" | 40 ft-lbs | Unconfirmed | |
| 3-3/4" | 2-1/2" | |||||||||
| 4-1/2" | 3-1/4" | |||||||||
| W | Simpson Strong Tie | Strong-Bolt 2 | Stainless Steel | 3037 | 1/2" | 3-3/4" | 3-3/8" | 65 ft-lbs | Unconfirmed |
Notes:
- The Stud MEA size and structural capacity of an individual Stud MEA anchor or anchor group shall be determined based on ACI 318-14, or later editions. Refer to the Division of Engineering Service’s Structural Design Alert – Anchorage to Concrete, dated 5/11/2020.
- The Stud MEAs are to be installed in accordance with the manufacturer’s installation instructions.
- ‘W’ = Wedge, ‘hef’ = Effective Embedment Depth, ‘Tinst’ = Installation Torque.
- International Code Council - Evaluation Service Report (ICC-ESR) per ACI 355.2.
- Anchor lengths shown are minimum acceptable lengths. The use of longer anchors is permitted.
- Installation torque subject to change. Refer to product installation information to confirm the installation torque.
- See Figure 1: Stud MEA.
Caltrans contact: Joe Harline, (916) 206-4373, joe.harline@dot.ca.gov
*As attested to by the supplier as of April 14, 2026 per definition in 2 CFR 184 and 23 CFR 635.410. Stakeholders should use this information in conjunction with corresponding Caltrans special provision section 6-1.04 to understand applicable requirement for the project.
The California Department of Transportation (Caltrans) is implementing statutory changes required by the Bipartisan Infrastructure Law -Build America, Buy America Act (BABA), as outlined in 2 CFR 184 and 23 CFR 635.410.
https://www.fhwa.dot.gov/construction/cqit/buyam.cfm