| abstract |
ThenThe invention relates to web plates 10, 52, 81, 90, the transparentnPlastic consist of at least two or more wallsn11, 12, 13, 14, 15, 91, 92, 93, 94, 95 are formed, at leastnpartially by means of webs 16, 17, 18, 19, 20, 21 in a fixed connectionnstanding together. The innovation is characterized in thatnat least one side of a wall 12 prismatic 30 formednis and the prismatic formations 30 outwardly 22 tonSolar radiation are directed and the prismatic formationsn30 on a weather-protectednCavity side are arranged, these prismatic formations 30thnform symmetrical triangles and in their longitudinal direction parallel to thenWebs 16, 17, 18, 19, 20, 21 arranged in the direction of the water outletnare. |