US PATENT SUBCLASS 52 / 690
.~ Side-by-side terminus shafts; e.g., truss

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}
690.~ Side-by-side terminus shafts; e.g., truss {4}
691  DF  .~.~> Truss with inclined lower chord
692  DF  .~.~> Truss with compound chord
693  DF  .~.~> Diagonal bracing {2}
696  DF  .~.~> Sheet metal-type spacer-connector

DEFINITION

Classification: 52/690

(under subclass 633) Structure including primary parallel longitudinal members (chords) held in spaced relationship by connecting or spacing means, the space between the primary members being void, e.g., a truss or ladder-like structure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

634+, for parallel members having spacing means integral therein.

656.1+, for crossing or intersecting elongated members which form a frame enclosing an area.

660+, for fabric or lattice type openwork of indefinite extent.

SEE OR SEARCH CLASS 29, Metal Working,

897.35, for process of assembling beams and girders.

182, Fire Escape, Ladder, or Scaffold,

194+, for similar openwork used primarily for climbing.