34 Pa. Code § 15.1
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Foldable grandstand-An assembly of prefabricated units used to produce a grandstand which may be readily folded, rolled or telescoped into a small space when not in use, and easily extended for use as support for audiences.
Grandstand-A structure, including bleachers, intended primarily to support persons attending athletic events, parades, concerts or other types of assembly, including permanent seating in theatres, churches, auditoriums and similar buildings.
Permanent grandstand-A grandstand, other than a portable or foldable grandstand, permanently erected upon and attached to concrete or masonry footings.
Portable grandstand-An assembly of prefabricated units able to be readily erected, dismantled and transported on base plates, sills, floor runners or sleepers.
Steel grandstand-A grandstand, the majority of whose main structural members, such as columns, struts, beams, stringers and the like, are constructed of iron or steel.
Wood grandstand-A grandstand, the majority of whose main structural members, such as columns, struts, beams, stringers and the like, are constructed of wood.
34 Pa. Code § 15.1