Question

Why are long span structures needed? And the types of building where long span structures are used ?

Answer 1

Steel is the major material for long-span structures. Bending structuresoriginally developed for bridges, such as plate girders and trusses, are usedin long-span buildings. ... Vaults made of rows of parabolic arches, usually in truss form for greater rigidity, have been used for spans of up to 98.5 metres (323 feet).