Abstract: In a process for producing wooden building components acted upon by flexural forces in the built-in condition, and made up of at least two members that are bonded together, the load capacity is increased by stressing at least one part of the component in the direction of its length by a linear force and is then bonded to another part of the component while still being acted upon by said force. In a preferred form of the invention at least one part of the component is acted upon by a pulling force and another part is acted upon by a compression force with a pre-stressing effect. The use of the process makes possible the production of bonded wooden structural members free of transverse forces.

Abstract: An apparatus for producing girders, as for example I girders, from lengths of wood forming the flanges and the web of the girder has a carriage running on rails through a first station in which lengths of wood are placed thereon for forming the girder, a pressing station in which the so put-together girder is first acted upon by an upright force normal to its web and parallel to its flanges, and then by a greater force acting horizontally on the girder so that the parts of the girder are kept lined up and in righted, straight condition, and through a HF station in which the girder is moved past HF electrodes for acting on the glue in the joins of the girder.