Abstract: The invention relates to a noise-protection wall-segment, for example for roads, motorways or railways and such like, said noise-protection wall-segment including transparent sheets, preferably a transparent plastic sheets, and means fixing the sheets. The transparent sheet is shaped around a perpendicular to the installation surface of the assembled noise-protection wall, the term ‘shaping’ being understood to mean vaulting and/or folding. Moreover, in the case of plastic sheets, preferably made of acrylic glass, threads of synthetic material can be embedded in the sheet which counteract splintering in the event of fracture and constitute a recognized bird impact protection device.

Abstract: What is disclosed is a rigid, one-piece, shaped body, made of a biaxially stretched synthetic resin in the form of a sheet at least 1 mm thick, the edge of which does not lie in a single plane, and the surface of which is smaller than a flat initial surface enclosed by the edge and preferably approximates the mathematically minimum surface enclosed by the edge, is suitable according to the invention as a lightweight building element having high resistance to buckling. The new shaped bodies are made by shaping a flat sheet of biaxially stretched synthetic resin at least 1 mm thick, while in the thermoelastic state, so that the edge of the sheet is brought into a configuration which does not lie in one plane, and the surface enclosed by the edge is allowed to shrink back partially while in the thermoelastic state, whereby a shrinkage of the edge of the sheet is prevented by clamping the edge, and the resulting shaped body is cooled below the softening temperature before the edge clamping is loosened.