Abstract: A building structure including a pair of opposing flank members having opposing spaced base-edges, upper edges meeting to define a peak of the structure, and convex contours each approximating the shape of a segment of a cylinder whose radius of curvature exceeds one half the base span of the structure. The flanks each comprise a plurality of generally rectangular panels disposed in edgewise abutment, the panels having support walls bordering the interior faces of the panels and having heights sufficient to withstand the stresses at the respective walls. The building structure includes end structures whose configurations are compatible with that of the flank members, and include panels disposed in a variety of edgewise, abutting arrangements.

Abstract: An arch comprising a plurality of pairs of trapezoidal panels, the panels having short and long opposite parallel sides, and the long parallel sides of the panels in each pair being in an abutting relationship. The nonparallel sides of the trapezoidal panels of adjacent pairs of panels abut one another, and a plurality of the abutting pairs of panels form the arch. The arches can be constructed side-by-side to form a pleated building.