Can cable tray bends be welded

Cable tray bends generally do not need to be welded; standard bends are typically installed using pre-fabricated fittings or mechanical fasteners, except for specific welded wire mesh trays.Standard Cable Tray BendsMost cable tray systems, including ladder and solid-bottom trays, are modular and designed to accommodate bends using pre-fabricated elbows, tees, and junctions. These fittings are manufactured to the correct angles and can be connected to straight sections using bolts, splice plates, or other mechanical fasteners without welding . This approach allows for flexibility, easier installation, and compliance with electrical standards while maintaining structural integrity. Field welding is generally not required and is avoided unless specified by the manufacturer.Wire Mesh Cable TraysAn exception exists for continuous welded steel wire mesh trays, where the mesh intersections are welded during manufacturing to ensure strength and rigidity . In these cases, the bends themselves are typically factory-formed and welded, and field welding is rarely necessary. The trays are designed to maintain ventilation and heat dissipation for cables, and welding ensures the mesh retains its structural properties. Any field modifications should follow the manufacturer's instructions to avoid compromising the tray's integrity.Best PracticesAlways use manufacturer-supplied fittings for bends to maintain proper cable support and bending radius .Avoid removing rungs or modifying ladder trays unless approved by the manufacturer, as this can affect load capacity and cable bending radius .For solid-bottom trays, ensure proper drainage and avoid welding in the field unless explicitly required.Consult relevant standards such as BS EN 61537 for cable tray systems to ensure compliance with safety and mechanical requirements .In summary, welding is not required for standard cable tray bends; mechanical connections and pre-fabricated fittings are sufficient. Welding is only relevant for specific wire mesh trays or custom modifications where structural integrity must be maintained.