Technically reviewed by Vincent, Founder at HEXVARO
Last reviewed
Concrete anchor comparison
| Anchor | How it holds | Base material | Best for |
|---|---|---|---|
| Wedge anchor | Expansion clip | Solid concrete | Steel base plates, racking, structural brackets |
| Sleeve anchor | Sleeve expands along its length | Concrete, solid brick, block | Mixed base materials and lighter fixings |
| Drop-in anchor | Shell expands with a setting tool | Concrete | Flush fixing and threaded rod hangers |
| Chemical anchor stud | Resin bond | Concrete; other bases with the right resin system | Close edge distances and high-load fixings |
When to choose each anchor
- Choose a wedge anchor for through-fixing steel into solid concrete.
- Choose a sleeve anchor when the base may be brick or block.
- Choose a drop-in anchor when a bolt or threaded rod must be removable.
- Choose a chemical anchor near edges, or where expansion force could crack the base.
What to state in a bulk RFQ
- Anchor type, diameter and length.
- Base material and whether the concrete is cracked.
- Material and finish: zinc, galvanized, A2 or A4.
- Any approval required, such as ETA or ICC-ES.
- Packing, labels, quantity per size and destination.
Approvals and load data
Load capacity depends on the anchor, concrete strength, embedment, spacing and edge distance. Use the data sheet of the anchor actually supplied. Safety-critical fixings need an engineer's design and, where required, an approved product.
Frequently asked questions
Which concrete anchor is strongest?
It depends on the size, embedment and concrete. Compare the published data for the exact anchors, not the anchor type alone.
Can wedge anchors be used in brick?
No. Wedge anchors are designed for solid concrete. Use a sleeve anchor or a suitable chemical anchor for brick and block.
What is the difference between a wedge anchor and a sleeve anchor?
A wedge anchor expands at a clip near its end and suits solid concrete. A sleeve anchor expands along its length and also suits brick and block.
When should I use a chemical anchor?
Use one when you need a fixing close to an edge, or when expansion force could damage the base material.
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