How to drill holes for cable tray bends in Mozambique

Drill holes for cable tray bends using a template or splice plate, ensuring proper alignment, correct drill size, and corrosion protection.Tools and Materials NeededDrill machine with appropriate metal drill bitsSplice plates or templates for hole alignmentClamps to secure the tray during drillingFile or deburring toolZinc-rich paint or anti-rust coatingNuts, bolts, or rivets for assemblyStep-by-Step Procedure1. Mark the Bend and Hole Locations Determine the bend angle (commonly 45° or 90°) and mark the tray where the bend will occur. Use a splice plate or a short piece of side rail with factory-punched holes as a template to locate the drilling points accurately . 2. Secure the Tray Clamp the cable tray firmly to prevent movement during drilling. Ensure the tray is level and aligned with the planned route . 3. Drill the Holes Drill through the splice plate and the tray side rail using the drill bit size that matches the hardware (nuts and bolts) you will use. Drill slowly to avoid deforming the tray and maintain a clean hole . 4. Remove Burrs and Sharp Edges After drilling, use a file or grinder to remove burrs. This prevents damage to cables and ensures a safe installation . 5. Apply Corrosion Protection Treat the drilled edges with zinc-rich paint or anti-rust coating, especially if the tray is galvanized or exposed to humid conditions common in Mozambique . 6. Assemble the Bend Attach the bent section to the straight tray sections using nuts, bolts, or rivets. Ensure the bend maintains the minimum permissible radius for the largest cable to prevent stress or kinking . 7. Final Checks Verify alignment, support spacing, and earth continuity links. Make expansion connections if the tray crosses building expansion joints .Additional TipsUse a drill jig if available for consistent hole placement.Always wear protective gear when drilling metal.For wire mesh trays, bends can sometimes be formed using bolt cutters, but holes for connections still require drilling .Plan the tray route carefully to minimize the number of bends and drilled connections . Following these steps ensures a safe, durable, and compliant cable tray installation suitable for Mozambique's environmental conditions.