frame anchor

doorframe anchor

An adjustable device, fabricated of metal, used to attach a doorframe to the surrounding structure; also see jamb anchor.
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References in periodicals archive ?
There are two types of tie-downs: over-the-top straps and frame anchors.
A grey stuccoed stair tower containing a steel moment frame anchors the house, structurally and visually.
A single screw at the base of the grip frame anchors the grip to the gun, so it takes only seconds to switch grips.