Metal trays are indispensable for wiring cables, and not necessarily electrical ones. They accommodate both network and fiber-optic and other wires. Main purpose:
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Protection of the wiring - so that in the event of a fire the light is on for a certain time, and the escape routes are illuminated, the elevators work, etc. Durability from 30 minutes and more than 3 hours. And it depends on the material from which the tray is made.
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Convenient to lay power lines. They can withstand heavy loads (depending on the type) and are easy to install.
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One tray can accommodate many cables - for comparison, much less can fit into a pipe, even the largest diameter.
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Access to networks at any time - for additional branching, fixing, laying additional wires.
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Protection of cables against ingress of moisture, explosive dust, such as wood chips in the factory. Subject to the use of sheet, one-piece options with lids.
Quality steel is a guarantee of reliability
They are made of steel with a protective zinc coating, which prevents product corrosion. Galvanizing can be done in several ways:
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Sendzimir galvanizing (conveyor galvanizing). The most popular method in which rolled steel sheet is dipped in reagents and dried in an oven. After that, it is heated and immersed in a container with molten zinc. The temperature in such a bathroom is 650 ° C. After surface treatment, the excess zinc layer is blown off by air under high pressure. As a result, the coating is uniform and resistant in an aggressive environment. Zinc coating weight 142.5-258 g /m2.
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Galvanized zinc. Zinc is deposited on the surface of the steel sheet with a zinc-containing electrolyte solution. Coating thickness 9-12 microns.
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Zinc lamellar coating. A special mixture of a reactive resin with a high content of zinc and aluminum flakes is applied to the sheet. The part is “baked” in ovens - when exposed to high temperatures, a zinc-aluminum layer is formed on the surface. It is resistant to corrosion, because the oxidation rate of aluminum is lower than that of zinc.
Separately, it is worth highlighting the models from demagnetic stainless steel. Used in food or chemical industries.
Now let's talk about execution options
There are several options for the execution of metal trays:
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Perforated. The most popular not only in Ukraine, but also abroad. The explanation for their popularity is simple - it is convenient to attach them anywhere in the side perforation. Depending on the thickness of the steel (0.75 mm, 1.00 mm and 1.25 mm), it can withstand a significant load.
