| 摘要 |
A structural support made of sheet metal or like material has a surface (2,3) intended to support a building panel or some other structural member, which is secured to the surface by means of screws or like fasteners. In order to reduce the force required to drive the screws or like fasteners, such as nails, into the support, the aforementioned surface is provided with closely lying weakened areas within a fastening area (9,10), the points of the fasteners being guided into the weakened areas by inclined surfaces adjacent thereto. |
