A catenary street light is a street lighting luminaire that is strung on a structural cable. The structural cable is an overhead wire that is suspended between two support structures (buildings, poles, etc.). The term ‘catenary’ refers to the curve formed when a cable hangs under its own weight. In the architectural engineering sector a catenary relates to a system of overhead wires. In Continental Europe, the overhead catenary system is often used to mount area and street lighting systems which are normally installed on poles.
The use of catenary lighting systems eliminates visual clutter associated with lines of street light poles and saves spaces for narrow or high pedestrian activity streets. It also provides the luminaire mounting flexibility required to optimize light distributions for a best possible visual environment and maximized fixture spacing. Catenary street lights are mostly used on downtown streets, shopping districts, car-free zones, internal road networks within a city block, narrow public ways of a residential area, and roads with no medians and sidewalks.