US PATENT SUBCLASS 52 / 729.1
.~ I-beam

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

720.1  DF  SHAFT (I.E., ELONGATED RIGID STRUCTURE) {15}
729.1.~ I-beam {2}
729.2  DF  .~.~> Compound construction {2}
729.5  DF  .~.~> Folded sheet material

DEFINITION

Classification: 52/729.1

I-beam:

(under subclass 720.1) Structure including at least two

flange members joined by a web member, which provide a cross-section of the shaft in the shape of an "I" or "H".

SEE OR SEARCH THIS CLASS, SUBCLASS:

737.1, for a beam with a cross-section which is different from an "I" or "H".