Short Span trays, often used for non-industrial indoor installations, are typically supported every 6 to 8-feet, while Intermediate Span trays are typically supported every 10 to 12-feet. B-Line series KwikRail cable tray systems feature rungs with patented fastener holes, allowing installers to easily remove, reposition or add rungs. Pre-punched holes on the I-beam side rails allow for simple attachment of accessories without drilling. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. For horizontal sections where cable trays are laid out in a straight line, the typical support span (distance between supports) should range from 1. es in the industrial environment.