US PATENT SUBCLASS 52 / 686
.~.~ Crossed supported member type

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

633  DF  OPENWORK; E.G., TRUSS, TRELLIS, GRILLE, SCREEN, FRAME, OR REBAR CHAIR {12}
677  DF  .~ Spacer-positioner; e.g., rebar chair {5}
686.~.~ Crossed supported member type

DEFINITION

Classification: 52/686

(under subclass 679) Structure particularly adapted to support two crossing or intersecting primary reinforcing members at the intersection thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

685, for a similar device in which a portion is moved or deformed to a final position.