This suspension systems can be used with a cable tray up to 30 cm wide. This is a suspension system using Threaded Rod and Tray Suspension. It is used to hang cable tray system. In this system, due to Central Suspension, it is difficult to lay the cable on the tray. You can use our patented K type (Simple Central Suspension w/ Threaded Rod) suspension system to make cable easier to be laid. However, the "A" type suspension system is a more rigid / stable system than the "K" type suspension system.