Abstract: The invention relates to a steel and to a flat steel product produced therefrom that have optimized mechanical properties and at the same time can be produced at low cost, without having to rely for this on expensive alloying elements that are subject to great fluctuations with regard to their procurement costs. The steel and the flat steel product have for this purpose the following composition according to the invention (in % by weight): C: 0.12-0.18%; Si: 0.05-0.2%; Mn: 1.9-2.2%; Al: 0.2-0.5%; Cr: 0.05-0.2%; Nb: 0.01-0.06%; the remainder Fe and impurities that are unavoidable for production-related reasons, which include contents of phosphorus, sulfur, nitrogen, molybdenum, boron, titanium, nickel and copper as long as the following respectively apply for their contents: P: ?0.02%, S: ?0.003%, N: ?0.008%, Mo: ?0.1%, B: ?0.0007%, Ti: ?0.01%, Ni: ?0.1%, Cu: ?0.1%. Similarly, the invention relates to a method for producing a flat steel product that consists of a steel according to the invention.

Abstract: A roof panel for sloped roofs includes a self-supporting reinforced plate concrete-like materials, wherein the reinforcement above the plate has bars running along the slope of the roof. In the vicinity of these bars, attaching elements are arranged which bear the roofing material. In order to protect these reinforcement elements from the influence of the weather, they are embedded into concrete ribs, whereby these concrete ribs undertake the function of holding the attaching elements for the roof covering.