US PATENT SUBCLASS 52 / 48
.~.~ Purlin or cross-bracing

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

45  DF  RAILROAD CAR ROOF CONSTRUCTION {4}
46  DF  .~ Continuous carline; e.g., discrete coextensive rafter {6}
48.~.~ Purlin or cross-bracing

DEFINITION

Classification: 52/48

(under subclass 46) Structure comprising a plurality of carlines and interconnecting structural members extending longitudinally of the roof or diagonally of the carlines.