Long-span buildings create unobstructed, column-free spaces greater than 30 metres (100 feet) for a variety of functions. These include activities where visibility is important for large audiences (auditoriums and covered stadiums), where flexibility is important (exhibition halls and certain types of manufacturing facility), and where large movable objects are housed (aircraft hangars).

Large span roofing are used for large span constructions such as factories, industry worksheds, shopping malls, huge exhibition centres, multiplexes etc.