clearspan

Clear span is the distance between supports in a structure that is free of intermediate columns, producing an unobstructed interior space. The term is used in architecture and structural engineering to describe the maximum open width or length between load-bearing elements. Achieving a large clear span relies on triangulated framing or rigid frame systems.

Common methods and materials include steel trusses, arches, space frames, and reinforced concrete or timber. In fabric structures, tensioned membranes are supported by a steel frame to create wide, open interiors.

Applications include warehouses, factories, gymnasiums, aircraft hangars, exhibition halls, and agricultural buildings. Clear spans enable flexible layouts and unobstructed movement of large equipment.

There are brands that market clear-span buildings, such as ClearSpan Fabric Structures, which offer large-span fabric buildings with engineered frames. These structures emphasize rapid assembly and open interiors.

Design considerations include deflection, wind and snow loads, thermal movement, and cost. Longer spans require more substantial framing and foundations to ensure stiffness and stability.