A method of fixing sheet metal sections and wooden bars or boards relative to each other, which latter transversely to the longitudinal direction of the sheet metal sections can be inserted into holes punched in the sheet metal sections, at which method after the boards have been inserted into intended holes and after the positions and angles for the sheet metal sections and boards have been aligned relative to each other, the sheet metal sections are pressed together about the boards, so that the sheet metal section after the removal of the pressing force assumes a permanent deformation, while the inserted board or boards elastically spring back so that section and wood permanently are pressed against each other.