A narrow fixed walkway providing access to an otherwise inaccessible area or to lighting units, light bridges, etc.; used above an excavation, around a high building, above the ceiling of an auditorium or theater, or around a stagehouse.
A narrow fixed walkway providing access to an otherwise inaccessible area or to lighting units, light bridges, etc.; used above an excavation, around a high building, above the ceiling of an auditorium or theater, or around a stagehouse.