The screw-on cable tray systems are used to support and route all kinds of cables, taking the approved load values into account. Depending on the corrosion protection used, they can be mounted both indoors and outdoors. 6 and offer high performance fastening. Approved metal anchors: concrete screws or female expansion anchors perfect for anchoring electrical cable trunking systems to different surfaces. Different coating options and approvals are available to meet the. PP mounting accessories are intended for joining cable trays, cable ladders, fastening of cable trays and cable ladders to bearing elements, and attaching bearing elements to the walls or ceiling.