Abstract: A biarch consists of two coplanar arches, curved in the same direction and radially spaced with cross ties having shear rigidity in planes perpendicular to the cross section areal center curve of the arch pair. End ties resist relative tangential arch displacements. Biarch framing members are strong, stiff, durable and economical structural members for framing aesthetically pleasing, clear span arched structures capable of withstanding hurricane winds and mountain snows. The most efficient materials for constructing biarch framing members are hardwoods, aluminum and steel. Biarch frames spanning up to fifty feet can be assembled or disassembled by one or two persons using common hand tools.