(under the class definition) Bridges of the simple arch type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2+, for combination truss and arch.
36+, for bascule-type bridges.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings), for other static structures of more general application, particularly
86+, for vertically curved arches with a terminal support, subclasses 245+ for curvilinear barriers, subclasses 639+ for curvilinear or peaked trusses, subclasses 223.1+ for a structure having a prestressing feature, and subclasses 690+ for other trusses.
