Wedge anchors are to be installed into solid concrete only and should not be used in other base materials such as brick or CMU. Wedge anchors are designed to go into a concrete hole permanently.
A very simple mechanism allows excellent consistent holding values in concrete to be achieved. Once inserted into the hole in the concrete, the nut is turned clockwise. This action pulls the anchor body up, which slides the expansion clip down the cone-shaped working end of the wedge anchor. The clip is then expanded and wedges between the anchor body and the concrete.
Parts of a Wedge Anchor:
- Anchor Body is made from carbon steel or stainless steel; it is threaded on one end for a portion of its length while the diameter is necked down and cone shaped tapering up to the nominal diameter at its other end.
- Expansion Clip is permanently attached to the anchor body around the necked down area of the anchor body.
- Nut is a standard national coarse hex nut; carbon steel and zinc plated or stainless steel.
- Washer is an SAE standard washer; carbon steel and zinc plated or stainless steel.
Drilling the Hole:
To install a wedge anchor in concrete, a hole must be drilled into the concrete. The hole must be drilled using a carbide bit in a hammer drill in the hammer and rotation mode to ensure proper hole size and consistency. Drilling a hole in concrete with a standard rotation drill may create a hole that is not suitable and may not meet the tolerance requirements of the wedge anchor. The tolerance between the hole size and wedge anchor size is critical for the wedge anchor to achieve its holding values.
Embedment Depth
Each diameter of wedge anchor has a minimum diameter that the anchor must be installed at for the anchor to achieve minimum holding values. The minimum holding values for each diameter can be found at:
Installation:
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