Chemical Anchor
Anchors · epoxy anchor · adhesive anchor · chemical anchor bolt · resin anchor
Definition: A chemical anchor bonds a threaded rod into a drilled hole with two-part epoxy or acrylate adhesive, achieving the highest pull-out strength of any anchor.
Anatomy
■ Head■ Shank■ Threads■ Point
Governing standards: ICC-ES AC308
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| 3/8 rod | M10 | 1/2 drill | 3-1/2+ embed |
| 1/2 rod | M12 | 5/8 drill | 4-1/2+ embed |
| 5/8 rod | M16 | 3/4 drill | 5-1/2+ embed |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| B7 threaded rod + epoxy | Cr-Mo steel + epoxy | — | For concrete |
| Stainless rod + epoxy | 304/316 stainless + epoxy | — | For corrosive / outdoors |
Materials
- Steel rod + epoxy
- Stainless rod + epoxy/acrylate
Pros & Cons
Pros
- Highest pull-out strength
- No expansion stress — works in cracked concrete
- Works in wet holes with the right resin
Cons
- Cure time before loading
- More expensive than mechanical anchors
- Hole must be cleaned thoroughly
Typical Uses
- High-load anchoring
- Cracked concrete
- Rebar and post-installed anchors
- Structural connections
Alternatives & Related
- Wedge Anchor — Faster, cheaper mechanical anchor
- Drop-In Anchor — Flush female mechanical anchor
Where to Buy
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FAQ
Chemical anchor vs wedge anchor?
Chemical anchors bond the rod to the hole and hold best in cracked concrete or near edges; wedge anchors are cheaper and faster but rely on expansion stress. Chemical anchors win for maximum load.
How long does a chemical anchor take to cure?
Fast-cure acrylics set in minutes; standard epoxies take hours to full strength, longer in cold weather. Follow the cartridge instructions.