ankerbouts

Ankerbouts are mechanical fasteners used to attach structural elements to concrete or masonry. The term derives from Dutch anker (anchor) and bout (bolt) and is commonly used in Dutch-speaking construction to refer to anchor bolts, including both cast-in and post-installed varieties.

They can be installed in two main ways. Cast-in-place ankerbouten are embedded during concrete pouring and cure with the concrete. Post-installed ankerbouten are secured after the substrate has cured, using expansion, wedge, or chemical anchors. Cast-in bolts are typically profiled or threaded, while post-installed options include mechanical expansion anchors and epoxy or acrylic anchors.

Materials vary by environment and load: carbon steel, galvanized steel, and stainless steel are typical; corrosion protection and coatings are important in outdoor or aggressive environments.

Design considerations include the load type (tension, shear, or a combination), embedment depth, edge distance, and spacing from nearby reinforcing bars. The anchor’s capacity must be verified against concrete strength and construction tolerances. In practice, engineers rely on manufacturer data, test reports, and applicable codes, such as ASTM F1554 for anchor bolts in the United States, along with local building regulations.

Common applications include securing steel columns and beams, handrails, machinery, and equipment foundations. Potential failure modes include pullout, crushing of concrete, or improper installation.

See also: anchor bolt, expansion anchor, chemical anchor, post-installed mechanical anchors.