Click "Calculate" to see the minimum bending radius and the recommended standard tray bend radius (300mm to 900mm) required for safe installation. Tray bend radius must be ≥ minimum cable bend radius. All illustrations, descriptions and technical information included in this document are provided as indications and can cable trays are equivalent. Use the largest cable diameter in the tray for calculation. Always select the next higher standard. In instrumentation EPC (Engineering, Procurement, and Construction) projects, installing cable trays is very important for making sure that signals are sent reliably, that people are safe, and that systems work well for a long time. Cable ladder systems and cable tray systems shall be manufactured in accordance with BS EN 61537, channel support. How to cut Oglaend System Support Channels, Cable Ladders and Cable Trays. Oglaend System manufacture and deliver Multidiscipline modular bolted support systems, cable trays, cable ladders and accessories for complete installation and containment of Instrument, Electrical, Telecom, HVAC and Piping. Table 2 of NEC provides the minimum radius of conduit bends. Is there some similar table or other reference available for the minimum radius of cable tray bends? For example, if we have to make a field bend for a 12” (300mm) metallic ladder tray using straight sections of this tray, then how much.