A process for the preparation of a self-supporting metal - wood - construction

摘要

A method of joining wooden boards and the like with open or closed plate profiles to various constructions, especially for outdoor use, of the type fence, garden furniture, bridges and the like. The method of the invention is characterized by the following operations. A plate strip of a plane material is first provided with punched holes (2) in the boards, the holes being arranged in pairs, two for each board. The plate strip with holes is thereafter pressed or rolled to its final profile (3), the punched out holes (2) forming guides of boards or bars, the retaining edges (3a) or the like (lugs or points) cooperating with the edge or lateral surfaces of the boards. Before the boards or bars are inserted into the holes they are dried to a moisture content which is as far as possible below the moisture content arising in the working environment of the device, preferably outdoors. After inserting the boards in the guide holes the moisture content is increased so that the boards swell and are pressed against the edges of the guide holes. IMAGE