Measurements of large-span roofs - diagnostic aspects

In a building terminology a large span roof is a roof with a limited number of internal support posts and a large usable surface, free from supports. A suspended roof - where bands play a pivotal role - is widely considered to be particularly light, modern and efficient in its basic functions. An example of such a roof is that of the Koszalin open-air theatre, with an area of approximately 4460 sq m.The structure of the roof is based on a prestressed cable network in the hyperbolic paraboloid shape (a saddle mould surface), attached to a steel rim girder.