Anchor Bolts

Anchor bolts are cast-in-place and designed for structural anchoring applications. They are usually encased in concrete walls, footings, piers and bases. "L" style is also known as:

angle bolt, bent bolt, bent leg, foundation bolt, foundation anchor bolt, hook bolt, L bolt, L hook bolt.

A washer and nut, often included, are used with anchor bolts.

Threads are standard right-hand and usually Unified inch coarse series (UNC, Unified National Coarse). All lengths are partially threaded.

Typically, anchor bolt sizes range from 3/8" to 1" in diameter, and lengths span from about 6" to 30". Length is measured from under the bent leg to the threaded end of the bolt.

Steel is the standard material. Plain finish, which lacks a surface treatment to inhibit rust, and hot dip galvanized are the usual finishes. For outdoor use, choose a hot dipped galvanized anchor bolt due to its corrosion resistant properties.

Anchor bolt size, length, spacing, positioning and embedment are determined for each application. The bolts must be long enough to ensure sufficient projection beyond the concrete to accommodate the structural member thickness, grout (if used) and washer and nut.

Refer to Industrial Fasteners Institute Standard IFI-136, Studs and Bent Bolts, for specifications relating to anchor bolts.

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