Self-tapping screws for metal sandwich panels
In the construction of houses today quite often used a variety of lining materials, as a function of which is the strengthening of the walls and their protection from external aggressive influences. For fixing on the facade of the sandwich panels, a metal frame is used.
The cladding is strengthened to the metal profile with special screws, which are distinguished by a unique 2-part thread. Self-tapping screws for sandwich panels are available in different sizes, and they must be chosen, taking into account the thickness of the metal frame and cladding.
Description of screws for mounting sandwich panels
The screws described above are threaded, one of which is located at the end of the fastener and is frequent and small, while the other is near the head, it is rare and larger. These components are divided by a smooth gap.
Self-tapping screws for a sandwich panels possess such features which provide reliability of fastening of furnish.The thread near the head has an impressive diameter; it is intended for fixing the lining. If we consider the fine thread located below, then it should be noted that it is used for insertion into the structure.
Self-tapping screws for sandwich panels, as mentioned above, have a smooth gap, it is necessary to avoid oscillations of cladding panels, which are located on the same level. Steel washers and gaskets are supplied with the described hardware in the kit, which exclude moisture penetration to the walls of the building and the fasteners themselves. The head has a hexagonal shape, so you can tighten the fasteners with a key. On sale you can find self-tapping screws, which are designed for fastening to wooden or concrete walls without the use of a frame. In this case, the fastener has a solid thread.
Sizes of screws
Self-tapping screws for a sandwich panels have the certain sizes. They should be properly selected, given the thickness of the cladding and metal profile. The metal frame used for screws with a diameter ranging from 5.5 to 6.3 mm, has a cross section of 1.5 to 15 mm. The fasteners may also have different lengths, it is in the range from 75 to 280 mm.
As for the thickness of the lining, it ranges from 17 to 245 mm.When calculating the length of fasteners, use the formula that assumes the sum of the thickness of the panels and the metal profile, as well as the length of the drill. To this value should be added 5 mm, which will go to the gasket.
Harpoon self-tapping screws for sandwich panels
On sale today you can find screws for attaching sandwich panels to metal from the manufacturer Harpoon. They are available in several varieties, based on carbon steel, which is covered with an anti-corrosion layer. If manufacturers use Ruspert and Xylan coatings, this indicates that the fastener diameter can vary from 5.5 to 6.3 mm, while the length varies from 85 to 285 mm.
Such elements can be used for metal profiles, whose thickness ranges from 4 to 12.5 mm. The cross section of the panel should not be more than 225 mm. Screws for metal sandwich panels may be required, the thickness of which does not exceed 5 mm. The minimum value is 2 mm. You should also use harpoon fasteners that have the same diameter, but less impressive length - from 85 to 230 mm.
On sale you can find a seriesHarpoonwhich is used exclusively for thick metal structures.The self-tapping screw will be suitable for a profile which thickness varies from 4 to 16 and from 4 to 25 mm. Such self-tapping screws differ in diameter, which can vary from 5.5 to 7 mm.
Roofing screws for sandwich panels can be designed to work with:
- professional flooring.
The first variety has a drill end up to 1.2 mm. If you pre-drill, this fastener will be able to cope with 6 mm. The basis of products is steel, which is covered with zinc. If we are talking about the screws on the tree, then they have a sharper end, which provides a good cross in the material.
When using fasteners of more impressive length, which starts from 40 mm, the holes are pre-made with a drill of a smaller diameter. Self-tapping screws for a professional flooring are similar to those used for sandwich panels. They are used to install corrugated on metal and wooden bases.
Self-tapping screws for fastening sandwich panels can be covered with different materials:
- chrome-cadmium layer;
- chromed zinc substance;
- nickel protection.
The tin coating provides a higher density when the product comes into contact with the panel. Against the effects of water and surface corrosion are coated with chromium-cadmium substances. As for the copper layer, it is able to protect the element and provide the possibility of reuse.
Eliminate rust and ensure tolerance of contact with aluminum can chrome zinc coating. The self-tapping screw will acquire qualities of high wear resistance and will show ability to undergo influence of moisture if to apply nickel on a surface.
It is not enough to choose a screw, it is important to observe the technology of its installation. When working, it is necessary to retreat from the edge of the sheet 30 mm. The distance between fasteners can be from 900 to 1200 mm. If the panel has a length of more than 6 m, then about eight screws will be needed for installation. If the length does not exceed the above parameter, the number of screws should be reduced to 6.
With a panel length of 4 mm, the same number of screws will suffice. The use of such screws will help securely fasten the panel without damaging its surface and ensuring tightness at the point of installation of the fastener.As a result, the material retains the ability to sustainably undergo changes in external factors, which are due to seasonal characteristics.