It has long been known that the duration of the operation of sandwich panels largely depends on the quality of fasteners that were used in their installation.
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Therefore, you need to choose self -extinguishing screws as close as possible. First of all, you need to decide on long products. In most cases, the thickness of the panel and frame with a long drill is folded for this and another 5 mm is added to the resulting result.
Most often, in this case, screws with a long rod of 15 mm are used.
It is important to understand that screws with all their hardness are quite fragile, by the way, here they are somewhat similar to diamonds. Manufacturers constantly improve fasteners using in their production more and more high -quality alloys. As a result, the resulting self -leading screws can be used as a real drill, these screws are able to drill a fairly thick sheet metal. As for the reliability with which they fix objects, it can be compared with the reliability that the welding seam gives.
Speaking of these fasteners, one cannot but mention their eternal satellites, namely the pucks. These goals are not at all simple, the fact is that a special sealing rubber is glued to them, which reliably sealing the place of fasteners input.