Butt strap | Article about butt strap by The Free Dictionary
A metal strap or plate which covers and secures both pieces of a butt joint
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Each spacer element represents a flexible section that has a toothed male butt strap
at one end and an appropriately toothed female slot on the other.