US PATENT SUBCLASS 52 / 191
.~ Risers connected to common stringer

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

182  DF  STEPPED; E.G., STAIR {6}
191.~ Risers connected to common stringer

DEFINITION

Classification: 52/191

(under subclass 182) Structure in which the vertical components of the step structure are individually connected to an elongated member formed as a single component serving as the primary beam (stringer).