Anchor Bolts - Liebig Ultraplus

Anchor Bolts


Anchor bolts are a generic term used by certain quarters to describe fixings or anchors as a means to attach objects to a base material. E.g. concrete, brick, block, Stone or plaster. There are different types of anchor bolts, each designed for use in specific base materials and or for specific applications.

The material from which the anchor is manufactured, its design features, together with its dimensions are what in the main determines whether it will efficiently and effectively be able to resist the loads imposed on it by the objects it is attaching to the base material.

Anchor bolts are designed to support different loads; pulling or tensile / tension loads which act along the axis of the anchor bolt as well as shear loads or shear forces which act directly across the axis of the anchor and along the surface of the base material . A combination of the two loads can also be experienced which is referred to as a combined load.

A steel column connected to the reinforced concrete foundation is one such example of an application for anchor bolts. The anchor bolts serving as the connection between the two structural elements. The general case of non-structural elements attached to a building is for example represented by the connection between a facade system and the reinforced concrete wall, concrete slab or floor.

Concrete anchors like Liebig anchor bolts, Fall in to the classification of torque controlled expansion anchors. They will either have a threaded portion and a nut protruding from the top or a hexagon bolt head.. Once installed through the baseplate, these are what are used to tighten the anchor and provide the clamping force required to resist the loads applied from the baseplate or other object to be fastened. Liebig bolts are made from carbon steel and are readily available with a zinc galvanized coating.

Liebig bolts come fully assembled, the lower end of the anchor bolt has a permanently attached steel expansion shield or expansion clip. As the nut or hexagon bolt head are tightened the expansion cone is pulled through the expansion shield creating the expansion required to resist the imposed loads

Anchor Bolt Diameter

To meet all applications requirements, anchor bolts range from 1/4 inch or M6 / 6mm for lightweight applications to 5/8 inch or M16 / 16mm in size for larger applications. The diameter chosen for each application depends on the load resistance or load retention values required., the specifications and the diameter of the hole in the fixture as well as other criteria.

Anchor Bolt Length

Each diameter of the anchor is available with a variety of lengths. The length of the anchor bolt selected depends on the depth of embedment required to achieve the load, the thickness of the base material it is being fixed in to and the thickness of the object to be fastened . To determine the correct combination of diameter and length  one should always consult the relevant technical data for the range of anchors being used.