The behavior occurs because the wireframe view does not apply depth testing, resulting in overlapping elements not being visually distinguished. Use the Hidden Line display style for a more accurate representation of multilayered cable trays. To Resolve cable tray not visible in dgn and nor can be found via selection tools in BRCM, this document explains way to find those hidden elements and delete it. User has modified their cable trays from 100mm height to 125mm, but when they generate report, they are still able to see some cable. I've loaded cable tray families, making the default trays into ladders and everything was good until I noticed that IFC exported cable trays are still displayed as boxes instead of ladders. As i understand, cable trays are a system family and you can't really edit them, but if another family type. Cable sag results from incorrect spacing of cable tray supports or from employing the incorrect tray type that is, light-duty perforated trays in high-load applications. Complicating the problem are overloaded trays and large unsupported spans. Sagging causes tension at connection points. Under. en completely installed, without damage either to conductors or structural system use maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. Common mechanical problems include: Sagging and Deflection: Excessive bending occurs when trays carry loads beyond their designed capacity or when support intervals are. Hubbell's NEXTFRAME® Ladder Tray is the effective and widely used cable runway that supports and delivers bundles of cable between cabinets, racks, and closets, along walls, and suspended from ceilings.