TENSIONED ARCHES

This invention comprises a design and construction method whereby various engineering structures are easily assembled from a series of segments (1) alternating with connector units (2). Especially for arch-shaped structures, slide-fitting segment members to the connectors (2) provides, through forces of contact, a self support mechanism during and after the erection process. By tensioning at least one strand (5) that runs through it, the structure is held firmly together under compression. In addition to providing the load carrying capacity of the structure by neutralising internal bending tensile stresses, tensioning the strand provides, via the connectors (2), a simple and effective inter-segmental jointing mechanism which simplifies assembly and dismantling of the structure. Since compression, rather than flexure, is the predominant mode of internal loading of segmental members, materials that are otherwise unsuitable, like small-diameter timber logs, become useful structural materials.