Fixing of cable trays in overhead pipe gallery

Cable trays in overhead pipe galleries should be securely mounted using appropriate support structures, fasteners, and accessories to ensure structural integrity, cable protection, and compliance with standards.Selection of Cable Tray and MaterialCable trays can be ladder, solid bottom, trough, channel, wire mesh, or single rail, typically made from steel, aluminum, or fiber-reinforced plastic depending on load, environment, and corrosion requirements . For overhead pipe galleries, perforated or wire mesh trays are preferred for ventilation and ease of cable management . Galvanized or powder-coated finishes provide corrosion resistance in industrial environments .Support StructuresOverhead cable trays require mechanical support to carry the weight of cables and withstand environmental and mechanical loads . Common support methods include:Wall-mounted brackets for trays along walls.Suspended supports using threaded rods or hangers from the ceiling.Bridge structures using MS angles or C-channels for long spans or heavy loads .Support spacing is typically 1 meter for standard trays, but may vary based on tray type, cable weight, and local standards .Fixing and FasteningMounting elements such as plates, clamps, and hardware kits are used to attach trays to supports .High-tensile bolts, washers, and nuts secure trays and accessories, ensuring vibration resistance and structural stability .Splices and intersection fittings connect tray sections end-to-end and allow for horizontal or vertical changes in routing .Insulation materials like G-10 sheets may be used at support points to prevent electrical contact with metal structures .Installation Best PracticesMark and measure the route before installation to ensure proper alignment and clearance from pipes and other services .Cut and drill tray sections as needed, using appropriate tools like saws, drills, and wrenches .Balance cable loads and secure cables with clamps or ties at regular intervals (typically 1 meter) to prevent sagging .Avoid damage to cable insulation during laying, using rollers or protective guides for heavy or high-voltage cables .Test fiber optic cables before and after installation to ensure integrity .Compliance and SafetyFollow DIN EN 61537 or BS EN 61537 standards for cable tray systems .Ensure trays are not used as walkways or for supporting personnel, as this can cause injury and damage .Consider environmental factors such as temperature, humidity, and potential chemical exposure when selecting materials and finishes . By following these guidelines, cable trays in overhead pipe galleries can be installed safely, efficiently, and with long-term reliability, supporting both power and communication cables effectively.