Anchor Bolts

Anchor Bolts are steel anchors cast into concrete foundations to secure base plates. Specify geometry, projection, embedment, thread and finish to match the foundation and baseplate assembly.

At a glance

Anchor Bolts at a glance.

What it is

A foundation anchor component

A steel bolt cast into the foundation to connect a base plate.

Physical function

Sets the threaded connection

Its foundation position and threaded end align the nut, washer and base plate.

Configuration

Geometry-led selection

Straight, headed or bent forms; 1/4 to 1 inch diameter; 6 to 60 inches length; UNC thread; plain, zinc-plated or galvanized finish.

Also known as

Anchor Bolts are anchor rods in the US, holding down bolts in the UK and cast-in bolts in Australia and New Zealand; in other languages they are tige d'ancrage (French), tirafondo (Italian) and perno de anclaje (Spanish).

English: foundation bolt
United States: anchor rod
UK & Ireland: holding down bolt
Australia & NZ: cast-in bolt
Français: tige d'ancragetige de scellementboulon d'ancrage
Italiano: tirafondo
Español: perno de anclaje

More names (2)

Français: canne d'ancragecrosse d'ancrage

Trade names for the whole range

How it works

Threaded projection through the base plate

The bolt is embedded in the foundation. Its threaded end projects through the base plate, where a nut and Plate Washer create the bearing surface.

Common applications

Where it is used.

Application

Foundation to base-plate connection

Establishes the threaded connection between a foundation and its mating hardware.

Application

Equipment and structural anchoring

Passes through a base plate so the nut and washer bear on the connection point.

Application

Template-positioned installation

Works with setting templates that hold the bolts at the correct location before the base plate is fitted.

What are anchor bolts called in different regions?

Anchor Bolts are called anchor rods in the US, holding-down bolts in the UK, and cast-in bolts in Australia and New Zealand. In other languages, they are tige d'ancrage (French), tirafondo (Italian), and perno de anclaje (Spanish).

What sizes and finishes do anchor bolts come in?

Anchor Bolts are supplied in diameters from 1/4 to 1 inch (M6 to M25 metric) and lengths from 6 to 60 inches (150–1500 mm). Available finishes include plain, zinc plated, and hot dip galvanized for different corrosion conditions.

Concrete systems

Foundation and base-plate anchorage

Cast-in Anchor Bolts connect base plates through their threaded projection. Plate Washers and nuts complete the assembly. Threaded Rods provide the rod option for other concrete connections.

Explore concrete systems

Technical specifications