Single Expansion Shields anchors, Double Expansion Shields anchors

The term expansion shield is used to describe a masonry anchor that requires the use of a bolt, lag screw or setting tool to expand the anchor once it is placed in a hole in the base material.   Other than epoxy type and concrete screws, all other concrete fasteners use expansion as a means by which their holding values are derived.  Different types of expansion shields have been developed over the years and all continue to have features and benefits that meet today’s application requirements.

Here is a listing of the different expansion shields’ features and benefits with links to both the technical information and product information.

Single ExpansionShields

Can be used for fastening into rock, concrete, brick, etc. If bolt is removed and replaced, holding power is unaffected. One-piece design, made of zinc alloy, is entirely rust-proof.

Double ExpansionShields

Can be used for fastening into rock, concrete, brick, etc. Eliminates high stress points detrimental in fastening into materials of medium hardness, expands fully and has high gripping power. Ideal for shear loads or where bolt is subject to side pressure or vibration. Does not fracture, and permits fastenings at any length.

Single Expansion Shields anchors, Double Expansion Shields anchors