The leisure sector is diverse with facilities of varying function and size being provided by local authorities, the education sector, sports bodies and the private sector. Leisure structures range in size from relatively small buildings, such as gymnasia, to larger buildings such as stadia which may be capable of holding 80,000 people. Each project comes with its own challenges, opportunities and efficient structural solution. They have unique requirements within the construction sector, as most modern developments are now multi-functional and have an inherent requirement to be state-of-the-art and distinctive. Unlike other types of more generic buildings, leisure structures tend to be quite specialist and architecturally-driven with particular emphasis given to quality, function, flexibility and appearance.