Fabricated cable tray sleeves, with or without firestop products, are an economical alternative to the high cost of fabricating penetration sleeves in the field. Outdoor. Steel I-beam sleeve for cable trays, includes splice plates and hardware. The following charts give the number of 3M pillows needed to completely firestop an opening that cable tray passes through. UL Listed Systems Concrete Wall - C-AJ-4056 3 HR F-Rating, 3/4 HR T-Rating Gypsum. The two most common solutions are cable management trays and cable sleeves. While both aim to organize your wires, they serve different purposes and are suited for different types of setups. Proper planning for installing cable tray includes calculations based on loading, support systems, cable/wire fill and spacing, conductor types, securing of the cables and wire, and proper grounding and bonding are all important aspects of cable tray installation.
[PDF Version]