Installation of sandwich panels for self -tapping screws: technical rules and requirements
Self -tapping screws for sandwich panels have a specific structure. Firstly, self-tapping screws are made of galvanized steel, because they should serve as long as the designs themselves from the sandwich panels. Secondly, the length and design of the screws should be such as to drill not only the thickness of the panel itself, but also the thickness of the frame.
Stainless steel screws are one of the best types of fasteners of sandwich panels for roofs or walls, since they retain the integrity of the structures as much as possible and prevent the cold and siege and siege inside. Stainless steel is preferred galvanized for these reasons.
Also, to create a strong and reliable fastening, the self -tapping screw should have the difference between the diameters of two parts. The part that is attached to the frame is made less in diameter than the part that is under the puck of a screw. The self -tapping puck should provide complete sealing, which is also achieved by the difference with the middle part of the self -tapping screw.