A method of connecting structural components having a relatively low thickness, the method including pre-applying, at an off-site location, one of an adhesive and a substance which activates an adhesive to at least one of at least one of the sides of the groove of one of the structural components and at least one of the sides of the tongue of another of the structural components, and connecting, at a site different from the off-site location, the structural components together by causing the tongue to be inserted into the groove.