(under subclass 474) Structure including means attached to or integral therewith which is permanently deformed, i.e., beyond its elastic limit, to grip the facer.
SEE OR SEARCH THIS CLASS, SUBCLASS:
356, for a furring, joist or stud structurally modified to engage a settable material backer.
364+, for a member serving as a receiver for penetrating fastener which may deform it.