Here is an application from the FreeCAD FEM workshop: an I-beam supported at both ends is subject to its weight as well as a center load of 1000 kg.

The beams considered here all have a length L of 5 m but various profiles: IPE100, IPE200 or IPE400 (this European nomenclature contains the height H of the beam, in mm; three other geometric parameters are necessary to define an IPE profile).