Installation method of galvanized vertical shaft cable trays

Galvanized vertical shaft cable trays should be installed with proper supports, secure fastening, and cable fixation to ensure structural integrity and compliance with standards.Material Preparation and InspectionBefore installation, all galvanized cable trays and accessories should be inspected for compliance with approved material submittals, checking for damages, coating integrity, and dimensional accuracy . Trays should be stored horizontally on flat surfaces with timber supports at intervals of about one meter to prevent deformation and protect against moisture and sunlight . Ensure that the galvanized coating is intact, as it provides corrosion resistance through a protective zinc layer .Support and MountingVertical cable trays must be self-supporting and fixed to structural steel or concrete using standard steel shapes, welded supports, or self-drilling dowels . Support spacing is critical: for ladder-type trays, a maximum of 3 meters between supports is recommended, while perforated trays should not exceed 2 meters to avoid strain . Supports should be level, aligned, and capable of carrying the design load, typically 100 kg/m for standard installations .Installation ProcedureReview Shop Drawings: Confirm tray layout, vertical runs, and cable routing according to approved drawings .Position Trays: Install trays vertically along shafts or walls, ensuring alignment and plumb orientation .Fastening Cables: On vertical trays, each cable should be secured with 20 mm wide stainless steel strips, typically two per meter, to prevent slippage . Horizontal trays use group fastening every 2–3 meters.Connect Sections: Use coupler plates or bonding jumpers at each joint to maintain electrical continuity and grounding .Check Clearances: Ensure trays do not interfere with other services or equipment and maintain adequate spacing for future cable expansion (typically 20% extra space), .Safety and ComplianceAll metallic cable trays must be bonded to the main grounding grid every 25 meters .Inspect for sharp edges or burrs that could damage cables .Ensure that installation follows relevant standards such as BS EN 61537 for cable tray systems and BS 6946 for channel supports .Additional ConsiderationsUse covers in areas with high risk of mechanical damage .Vertical trays should be installed only when necessary; horizontal installation is preferred where possible .Verify that the galvanized coating remains intact after cutting or drilling; touch-up with zinc-rich paint if needed to maintain corrosion protection . By following these steps, galvanized vertical shaft cable trays can be installed safely, securely, and in compliance with industry standards, ensuring long-term durability and reliable cable support.