Beam and rafter wooden roof structure - has shared double trapezoid or round timbers holding rafter ridge ends together

摘要

The wooden roof structure mainly comprises ceiling beams and rafters. Rafters, both opposite to one another and adjacent to one another, are held together at the ridge ends (2) by a common double-trapezoid timber or round timber (6), extending over the whole ridge length. The roof ends are cut to match the trapezoid timber, fitting against it; or fit into cylindrical recesses in the round timber, formed by semi-cylindrical recesses brought together. The base end of the rafter lies on a standard base sill, secured against danger or displacement. Construction is simplified, with no need for fishplates and pincer clamps, and rapid erection is feasible, using flat roofing elements, leaving a roof spave with closed internal surfaces.