Supporting beam for slab systems, slab system, and method for the production thereof

A supporting beam of composite design, for slab systems of composite design, the supporting beam extending in a longitudinal direction, the supporting beam comprising:

• a steel support consisting of steel, which extends in the longitudinal direction,
• the steel support being formed in at least two pieces and having at least two steel support parts which each extend in the longitudinal direction, the steel support including a top end and a bottom end,
• the steel support comprising a base plate at the bottom end thereof, the base plate including at least two base plate parts which each extend in the longitudinal direction,
• the base plate parts being arranged so as to be spaced apart from one another in a transverse direction,
• the steel support comprising a first web and a second web arranged at an angle to the base plate, the first and second webs being spaced apart from each other in the transverse direction, each of the first and second webs including an inner surface and an outer surface, the inner surfaces facing inwardly toward each other in the transverse direction, the outer surfaces facing outwardly relative to the inner surfaces in the transverse direction,
• the steel support including one or more protrusions protruding outwardly relative to the outer surfaces of the first and second webs only at the baseplate in the transverse direction running perpendicular to the longitudinal direction, the one or more protrusions configured to support one or more components thereon, the transverse direction running horizontally when one or more components are supported thereon,
• a reinforcement cage, which consists of reinforcing steel and/or longitudinal bars and stirrups, wherein concrete surrounds the reinforcement cage at least in sections, and
• connectors attached to the steel support which extend through interstices in the reinforcement cage in a transverse direction running perpendicular to the longitudinal direction.