Steps for fabricating the arc shape of the cable tray

Arc-shaped cable trays can be created by bending metal trays using specialized machines, manual cutting and forming techniques, or CAD-based modeling with sweep tools.1. Design and PlanningBefore fabrication, determine the radius of the arc, tray type (ladder, solid, perforated), and material (steel, aluminum, stainless steel, or fiberglass) based on load and environmental requirements . Accurate measurements ensure the tray fits the intended path and maintains structural integrity.2. CAD Modeling ApproachFor software-based design, such as in Revit or other CAD tools, you can create an arc-shaped tray using a sweep or in-place family method . This involves:Drawing the desired arc or spline path.Using the sweep tool to extrude the tray profile along the curved path.Note: This method may limit branching or automatic trimming with standard cable tray families.3. Manual Fabrication TechniquesFor physical trays, arc shapes can be achieved using cutting and bending methods:Three-cut formula: For 90° bends, cut the tray at three points and bend each section to form a smooth curve .Incremental bending: For larger arcs, make small angled cuts along the tray and gradually bend each segment to approximate the curve.Ensure edges are smooth and the tray maintains load-bearing capacity.4. Using Cable Tray Making MachinesIndustrial production of arc-shaped trays often uses roll forming machines with customized dies :Metal strips are fed through forming stations that bend, punch, and cut the tray into the desired arc.CNC-operated machines allow precise control over radius and angle, producing consistent curved trays.Surface treatments like galvanization or powder coating can be applied after forming to prevent corrosion .5. Installation ConsiderationsSupport the tray along the curve with brackets or hangers at regular intervals to prevent sagging.Ensure bends do not exceed the tray's minimum bend radius to avoid deformation or cable damage.Verify that the arc allows for proper cable routing and maintenance access. By combining careful design, appropriate material selection, and either manual or machine-assisted bending, you can create arc-shaped cable trays that are both functional and durable for electrical installations .