Structural anchors buying guide
Structural anchors tie framing to concrete, masonry or steel. Specify type, diameter, embedment and approval, and get installation instructions with every order.
A structural anchor is part of the load path, so it is specified by the design team and bought exactly as named. Request the type, diameter, length, material, coating, and a current evaluation report, plus the manufacturer's installation instructions.
Anchor families
| Family | How it holds | Buyer attention |
|---|---|---|
| Cast-in-place | Set in formwork before the pour | Placement tolerances and templates |
| Mechanical post-installed | Expands or undercuts in a drilled hole | Hole size, edge distance, torque |
| Adhesive post-installed | Resin bonds a rod in a drilled hole | Cleaning, cure time, shelf life, temperature |
| Powder or pin fasteners | Driven into steel or concrete | Applicable only for the intended loads and base material |
| Masonry anchors | Screws or sleeves for block and brick | Whether the cells are filled or hollow |
Not every family suits every base material. The drawings name which to use.
Specification lines
- Type and manufacturer series as scheduled.
- Diameter, length, material (carbon, stainless, galvanized) and coating.
- Required embedment and edge distance, taken from the drawings.
- Evaluation report number or code approval if required. See ICC-ES for report lookups.
- Installation tools, such as drill bit size and cleaning brushes, for post-installed anchors.
Installation affects performance
For post-installed anchors, how the hole is drilled and cleaned can matter as much as the anchor itself. Hole size, dust removal, and curing conditions are in the manufacturer's instructions. Ask whether special inspection is required by the project; if so, the inspector will want the product documentation on hand.
Documents to collect
- Product data and installation instructions for the lot supplied.
- Evaluation report or equivalent listing.
- Material certificates where the specification needs them.
- Batch number and expiry for adhesives.
Common mistakes
- Swapping a cheaper anchor when the original is back-ordered.
- Drilling too close to an edge.
- Reusing an adhesive cartridge past its date.
- Skipping hole cleaning.
Safe handling of drilled concrete dust and adhesives is covered by occupational safety authorities such as OSHA. This guide does not approve any anchor for any use.
Questions people ask
Is a wedge anchor the same as an adhesive anchor?
No. Wedge anchors expand mechanically against the hole, while adhesive anchors bond with resin. Each has its own installation rules.
What is embedment depth?
The length of anchor inside the base material. The design sets it, and installers must reach it.
Do anchors expire?
Adhesives have shelf life and temperature limits. Check the manufacturer's printed dates and storage guidance.
Who approves an anchor substitution?
The engineer of record, using the anchor's evaluation report and the design values.
Sources and further reading
Have a project outline or drawings?
Organize your scope, then contact Digital Oro through its official channel. Availability, engineering, pricing and delivery terms need project-specific confirmation.
Explore Digital Oro →Digital Oro International advertises on The Company Chronicle. This guide was written by our editorial team from public sources and general professional practice; it does not describe a guarantee, quote or offer from Digital Oro International. Confirm current terms, prices and availability with the operator before you decide.