First, match the cross-section to the cable group. Enclosed, rung, ventilated-pan, and strengthened long-span forms offer different levels of cover, access, and spacing. Suspended Cable Tray sections use an internal cold-formed skeleton inside an epoxy-glass body, giving the overhead route both rigidity and electrical insulation.
Second, check the chemical surroundings. The exterior tolerates 50% acetic acid, 10% sulfuric acid, and 20% nitric acid. Third, review climate and fire behavior: the working range is -40°C to 80°C, the oxygen index is at least 30%, and an ultraviolet-reflective skin supports outdoor exposure.
Fourth, plan handling and joining. Weight is roughly one third of traditional steel bridgework, allowing one or two people to move pieces with ordinary tools. Clips or plates connect adjacent lengths without site welding. Stainless fasteners keep joint locations compatible with the corrosion-resistant body.
Fifth, set support positions before installation. Indoor hanger intervals are 1.5-3 m, exterior columns are generally 6 m apart, and stacked levels can use 200, 250, 300, or 350 mm centers. A Suspended Cable Tray can serve petroleum, chemical, power, communication, hospital, data, metro, civil-defense, and high-rise routes where low weight, insulation, corrosion resistance, simple overhead handling, and accessible assembly are required together.