A method for supporting a first beam between a first support structure and a second support structure in a building frame structure, wherein the first beam is a hollow steel beam having an horizontal inner space limited by a base plate, two web parts, a top plate, and a beam end plate at each of a first end and a second end of the first beam, and wherein the method comprises providing a first console to extend from the inside of the first support structure to the outside of the first support structure so that the first console has a first free end and a beam supporting surface between the first support structure and the first free end of the first console, providing the first beam with a supporting slot extending from the first end of the first beam at a lower side of the first beam so that the supporting slot forms a first slot section in the beam end plate and second slot section in the base plate, supporting the first end of the first beam at the first console so that the first console is partly received in the supporting slot of the first beam and so that the first beam is supported on the beam supporting surface of the first console, securing the first beam to the first console against movement along the first console by means of a mechanical joint between the first console and the first beam, providing the first free end of the first console with a console end plate, and supporting a second end of the first beam at the second support structure, characterized by providing the supporting slot with vertical side plates inside the horizontal inner space of the first beam to laterally limit the supporting slot inside the horizontal inner space of the first beam, wherein the vertical side plates are fastened to the first beam, by providing the end of the supporting slot with an indentation that extend in the transversal direction of the first beam in two opposite directions, and dimensioning the console end plate so that the console end plate extends in the transversal direction of the first beam beyond the vertical side plates in two opposite directions into the indentation of the supporting slot so that the vertical side plates together with the console end plate form at least a part of said mechanical joint between the first console and the first beam, and by providing the first console at a location between the beam supporting surface of the first console and the mechanical joint with a deforming section having increased deformability compared to the deformability of the first console at the beam supporting surface by providing reduced material dimensions in said deforming section of the first console compared to the material dimensions of the first console at the beam supporting surface. providing a first console to extend from the inside of the first support structure to the outside of the first support structure so that the first console has a first free end and a beam supporting surface between the first support structure and the first free end of the first console, providing the first beam with a supporting slot extending from the first end of the first beam at a lower side of the first beam so that the supporting slot forms a first slot section in the beam end plate and second slot section in the base plate, supporting the first end of the first beam at the first console so that the first console is partly received in the supporting slot of the first beam and so that the first beam is supported on the beam supporting surface of the first console, securing the first beam to the first console against movement along the first console by means of a mechanical joint between the first console and the first beam, providing the first free end of the first console with a console end plate, and supporting a second end of the first beam at the second support structure, characterized by providing the supporting slot with vertical side plates inside the horizontal inner space of the first beam to laterally limit the supporting slot inside the horizontal inner space of the first beam, wherein the vertical side plates are fastened to the first beam, by providing the end of the supporting slot with an indentation that extend in the transversal direction of the first beam in two opposite directions, and dimensioning the console end plate so that the console end plate extends in the transversal direction of the first beam beyond the vertical side plates in two opposite directions into the indentation of the supporting slot so that the vertical side plates together with the console end plate form at least a part of said mechanical joint between the first console and the first beam, and by providing the first console at a location between the beam supporting surface of the first console and the mechanical joint with a deforming section having increased deformability compared to the deformability of the first console at the beam supporting surface by providing reduced material dimensions in said deforming section of the first console compared to the material dimensions of the first console at the beam supporting surface.