The distance between hangers should typically not exceed 1. 5 meters, although this can vary depending on the tray type and load. Fixed supports are critical for the overall stability and safety of the cable tray system. Where products of five metre lengths or above are packed in bundles, they shall be supported with a minimum of three timber bearers which provide sufficient clearance to accommodate the forks of a forklift truck. Where shorter length. us-trations without notice. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require. When installing two cable trays in parallel at the same height, the distance between them should be no less than 0. Installation should only be attempted by site personnel well versed in provincial and federal electrical.