the invention relates to a structural member and a process for producing a structural member with at least one layer of plastic and with a layer inside the structural member of a material that has a substantially higher modulus of elasticity than plastic . the member also has at least one system plane that is part of the structural member and along which the structural member has substantially homogenous properties and a substantially homogeneous structure . the invention is characterized in that along the system plane , at least one inner layer and a respective outer layer consisting of plastic are provided between which two layers each separated from each other and traversing the system plane with the second higher modulus of elasticity are provided .