ABSTRACT
British Standard European Norm 206-1 defines high-strength concrete (HSC) as concrete with a compressive strength class higher than C50/60 in the case of normal-weight concrete and LC50/55 in the case of lightweight concrete. Classification of steel materials is necessary to determine whether these materials should be allowed for structural use in the construction industry with or without any restrictions. Steel materials are certified steel materials manufactured with approved quality assurance. Steel materials are noncertified steel materials that meet the material performance requirements through material testing and are manufactured with approved quality assurance. Shear connectors are used for providing composite action between steel and concrete. The most common connector used in construction is the headed shear connector. It can be welded to the upper flange of steel beams either directly or through profiled steel sheeting. High-strength steel and concrete are not strain-compatible in the sense that HSC reaches its peak strain much earlier than the yield strain of high strength steel.
