Undercut Type Mechanical Expansion Anchors (MEA)
Last edit date: 11/4/2022
| MEA Diameter |
Manufacturer | Product Name | Material Type | ESR (4) | Stud Diameter |
Anchor Length (5) |
hef (3) |
|---|---|---|---|---|---|---|---|
| 3/8" | Dewalt | CCU + Undercut Anchor | Stainless steel | 4810 | 3/8" | 6" | 4" |
| Hilti Corporation North America | HDA Undercut Anchor | Stainless steel | 1546 | 10 mm (3/8" equiv.) | 150 mm (5.91") | 3.94" | |
| 1/2" | Dewalt | CCU + Undercut Anchor | Stainless steel | 4810 | 1/2" | 7-1/2" | 5" |
| Hilti Corporation North America | HDA Undercut Anchor | Stainless steel | 1546 | 12 mm (1/2" equiv.) | 190 mm (7.48") | 4.92" | |
| 5/8" | Dewalt | CCU + Undercut Anchor | Stainless steel | 4810 | 5/8" | 10-3/4" | 7-1/2" |
| Hilti Corporation North America | HDA Undercut Anchor | Stainless steel | 1546 | 16 mm (5/8" equiv.) | 275 mm (10.83") | 7.48" | |
| 3/4" | Dewalt | CCU + Undercut Anchor | Stainless steel | 4810 | 3/4" | 14" | 10" |
Notes:
- The Undercut MEA size and structural capacity of an individual Undercut 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 Undercut MEAs are to be installed in accordance with the manufacturer’s installation instructions.
- ‘equiv.’ = Equivalent, ‘hef’ = Effective Embedment Depth.
- 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.
- See Figure 1: Undercut MEA.
Caltrans contact: Joe Harline, (916) 206-4373, joe.harline@dot.ca.gov