Roofarc

Roofarc is a term used to describe a roof design featuring an arched or curved profile, typically spanning between supporting walls or frames. It can describe roofs whose upper surface forms a continuous arc, such as a barrel vault, or more complex ribbed arches. The term is not standardized and may be used as a general descriptor or as a brand name for specific products in some contexts.

Design and construction: Arched roofs rely on compression in the curved members, transferring loads to supports. Barrel vaults have a single curved surface; ribbed arches use a framework with arches and ribs to shape the curve. Construction materials include timber framing, steel arches, or reinforced concrete, with cladding options like tiles, metal panels, or membranes. Drainage, insulation, and thermal movement must be carefully accounted for in detailing and connections.

Applications and history: Arched roofing has roots in ancient architecture, including Roman vaults and Gothic arches. In modern architecture, roofarc designs are used in airports, stadiums, train stations, pavilions, and large industrial or commercial buildings where wide clear spans are desirable. Prefabricated arch systems are common in contemporary projects to control fabrication tolerances.

Advantages and challenges: Benefits include aesthetically pleasing forms, efficient load distribution, and the ability to cover large spans without interior supports. Challenges encompass higher fabrication and construction costs, the need for precise tolerances, complex connections, and ongoing maintenance to manage movement and sealing at joints.

See also: arch roof, curved roof, barrel vault, ribbed vault.