Structural Steels in structural engineering

Reliability and maximum dimensions of structures of structural engineering are among others determined by the characteristic of the used materials. The material characteristic from the in steel structure used products can be exactly adapted to the particular demands. For the low alloyed ferritic structural steels the most common methods of strength increase are described. The fabrication conditions and the terms of use can influence the ductility of the steel according to the manner of the applied method differently To eliminate inadmissible risks limitations for the materials regarding the operating conditions, dimensions and methods of handling are necessary In Germany such limitations for buildings are fixed in the technical building regulations, This essay shall demonstrate the different strength increasing influences and therefore it shall increase the understanding of adherence the material-conditioned limitations. For cases where the limitations differ from the conditions background information are pointed out to facilitate evaluation in individual cases ("Zustimmung im Einzelfall").