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Thickness of galvanized cable trays in Portugal

Galvanized cable trays in Portugal typically use steel sheets with a zinc coating of 18–21 microns (275 g/m²), providing strong corrosion resistance.Zinc Coating Thickness

Galvanized cable trays are manufactured from steel sheets coated with zinc through hot-dip galvanization. The most common zinc coating thickness for Sendzimir galvanized steel is Z 275, which corresponds to 275 g/m² on both sides, equivalent to approximately 18–21 microns . This coating ensures long-term protection against rust and corrosion, acting as a sacrificial layer if the steel surface is damaged .

Steel Sheet Thickness

The base steel sheet thickness varies depending on the tray type and load requirements. Standard perforated or ladder-type trays typically use steel sheets ranging from 1.0 mm to 2.5 mm, while heavier-duty trays for industrial applications may use thicker steel. The exact thickness is selected based on mechanical load, span, and environmental conditions .

Standards and Compliance

In Portugal, galvanized cable trays generally comply with European standards, including NEN-EN-ISO 1461, which specifies minimum coating thickness and durability requirements . The zinc layer provides cathodic protection, and modern galvanizing processes ensure a uniform, shiny surface with consistent thickness .

Practical Considerations
  • Perforated trays allow ventilation and prevent cable overheating.
  • Solid-bottom trays may require slightly thicker steel to maintain rigidity.
  • Environmental factors such as humidity, coastal exposure, or chemical presence may influence the choice of coating thickness or additional protective layers. In summary, for galvanized cable trays in Portugal, expect a zinc coating of 18–21 microns (275 g/m²) on steel sheets typically 1–2.5 mm thick, ensuring durability, corrosion resistance, and compliance with European standards .
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