Crane having a truss girder with flattened braces

A crane comprising at least one crane girder that extends horizontally and is designed as a truss with a plurality of braces, on which girder a crane trolley with a lifting gear is movable, wherein at least some of the braces are designed having a flat shape, wherein the flat-shaped braces each have a planar main surface that extends in each case transversely with respect to a longitudinal direction of the crane girder, wherein the flat-shaped braces have an elongated shape with longitudinal sides, and comprise in a region of the longitudinal sides of the braces in each case at least one folded auxiliary surface that adjoins the main surface, wherein the at least one auxiliary surface points transversely with respect to the longitudinal direction of the crane girder, the braces having opposite brace ends, wherein lower and upper recesses are provided in the main surfaces of the braces along respective laterally-outboard edges of the longitudinal sides of the braces, wherein the auxiliary surfaces are spaced longitudinally inwardly from the brace ends and between the lower and upper recesses, and wherein the length of the auxiliary surface extending between and outside the brace ends is in a range of about 40% to 70% of the total length of the respective brace.