It is designed for safely mounting AC units, cable trays, ductwork, and walkways on flat roofs without damaging the surface. Each kit includes two 350mm x 350mm rubber feet with a 95mm height. They are made from 100% recycled SBR rubber and provide excellent anti-slip and. Rooftop cable tray carries the electrical and data backbone of a building, and how it is supported decides whether that backbone stays organized, code-compliant, and off a roof it could otherwise damage. Layout isolation pads, (provided by contractor), according to the design and layout. Insert legs of duct support into bases and attach with. As buildings contain more and more devices and systems requiring structured cabling, the need for sturdy cable tray supports is growing. They're also designed to maximize job-site efficiency. What can we offer? Need support?.