Galvanized Roofing Sheet is used in the manufacture of galvanized metal roofing, the use of this type of metal roofing has been found in various industries and building structures including factories, warehouses, storage facilities, office buildings, hotels, motels, shops, residential houses. The manufacturing process for this type of roofing is through the application of an electrochemical process and includes melting the metals, forming them into sheets and applying these sheets into roofing constructions. The sheet metal is heated by an alternating current passing through it and then coated with a liquid that has the properties of protecting it from corrosion. This coating is called galvanized roofing sheet. Galvanizing is a method of electroplating and involves passing an alternating current through a piece of metal until it becomes plated with a protective layer that is electrically conductive.
There are several materials that can be galvanized. Stainless steel, Aluminum, zinc, iron, copper, lead, zinc and manganese can be used for the coating nha khung thep. Zinc is used because it is very easy to install and also has a very good resistance to corrosion. It can resist extreme temperatures and is non-combustible, which makes it a popular choice. Stainless steel, aluminum and zinc are more difficult to apply and have better thermal conductivity which is needed in the galvanizing process.
Galvanized Roofing Sheet is available in different thicknesses. The thickness can be decided based on the environment of use, cost considerations, the expected life of the coating, maintenance requirements, and the maintenance practice of the company doing the coating. Galvanized Metal is usually galvanized at a specific thickness depending on its intended use. The higher the thickness of the corrugated coating, the better the insulation and the better the conductivity of the final coating.
The thickness must be determined by certain measurements, such as the total height of the corrugated surface, the height of the girders and the valleys between the ridges. The total height should not include the spaces between individual rafters. For each dimension, there is a recommended thickness that can be used as a maximum thickness in the application. The recommended gi thicknesses are based on chloride coatings with a specific density of 0.5 mm and a maximum thickness of about 0.3 mm. It is usually accepted that each of the dimensions should range from one to three times the total height of the roofing system.
It is important to determine the specific thickness required based on the application. For example, steel roofing systems at heights of more than 30 feet require a maximum thickness of about ten times the height. In areas with extreme weather conditions, like the tropical or subtropical climates, the actual thickness should be decreased. If the climate is very cold, then a higher level of galvanized gi may be appropriate. On the other hand, for cold climates, higher levels of galvanized gi may be suitable, so long as the metal roofing is made from materials that do not conduct heat well.
When purchasing galvanized sheet metal, make sure that the sheet will be shipped in standard packaging. The standard sea-worthy packing should be obtained from the manufacturer to ensure that the sheet will arrive in good condition. It is also important that the galvanized sheet will be received according to the terms set out by the manufacturer. Some manufacturers stipulate that the purchase and installation of the sheet must be done only at their factory, while others offer installation and purchase options at many local dealers.