A section fixable in a mounted position to an anchoring base by means of fastening screws has at least one fastening segment extending in the mounted position substantially parallel to the anchoring base. The fastening segment is, for example, a fastening flange, which is provided with at least one screw hole for receiving a fastening screw provided with a slot or cross slot as the surface engaged by a screwdriver. A safety (or securing) tab protrudes from the fastening segment at least within the area of the screw hole. When the section is in its mounted position and after the fastening screw has been driven in, the safety tab can be deformed by bending or folding it into its safety or securing position. In this position, the tab grips over the edge of the screw head of the fastening screw and leaves free the surface engaged by the screwdriver. In an alternative embodiment of the section, a spring-elastic safety arrest is used instead of a bendable safety tab. As a fastening screw is being driven in, the safety arrest is pushed away sideways by the head of the screw and, after the fastening screw has been completely driven in, the safety arrest snaps into a safety position in which it grips over the edge of the head of the fastening screw.