Abstract: A reinforced construction panel which is bent around a longitudinal flexure axis. The panel has a plurality of parallel, dovetail-shaped grooves in its inner surface. Each of the dovetail-shaped grooves lies in a plane which is perpendicular to the longitudinal flexure axis. A number of tension elements, each one of which is disposed in a plane which is perpendicular to the longitudinal flexure axis, end in two male fittings, one at either end. Each of the male fittings is sized and shaped so as to be received and held in one of the parallel, dovetail-shaped grooves.

Abstract: Proposed is a burl foil that can be installed as insulation in shed-like buildings, in particular greenhouses, where a Jalousie-like movement of the burl foil from an at-rest position into a use position is said to be possible, without that the required space for stacking the burl foil in the at-rest position be too large. Additionally proposed are attachment means for the burl foil to drawing means or wire ropes that are embodied as simply structured, commercially producible clamping parts that can also be installed by lay persons on any whatever burl foils.