twospan

Twospan is a term used in engineering and design to denote configurations that include two spans between supporting elements. In common usage, the form can be written as two-span or twospan and is most often encountered in civil engineering, where it describes bridges, overpasses, and similar structures arranged with two adjacent deck segments separated by an intermediate support.

In civil engineering, a two-span structure may be a girder, arch, or cable-supported bridge. The central support divides the deck into two spans, which can differ in length and curvature. Design considerations for two-span configurations include the spacing and strength of the piers, the continuity of the deck across intermediate supports, load distribution between spans, and the sequencing of construction and maintenance. Two-span arrangements are often chosen to balance material usage, constructibility, and hydraulic or scenic constraints.

Beyond structural engineering, "twospan" or "two-span" is occasionally used as a brand name, project codename, or product designation in architecture, software, and media contexts. In these cases, the meaning is specific to the organization and does not imply a universal technical standard.

Notable examples are organization- or context-specific and vary by country and discipline; the term is chiefly descriptive rather than a formal specification.

See also: single-span, multi-span, bridge, span (structure), pier (bridge).