The distance a beam or other member bridges between its two supports.
The horizontal distance between supports of a structural member such as a beam, joist, girder, or truss. Span length is a primary factor in determining member size, deflection, and the type of structural system required. Longer spans require heavier or deeper members and may require more sophisticated structural systems.
The 48-foot clear span of the gymnasium roof is achieved with steel trusses that eliminate mid-floor columns.
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