Thickness standard aluminum alloy cable tray 2013 industry standard stipulates that when the width of the bridge is greater than 800mm, the thickness of the bridge plate should be 3. 0mm, and. All calculations and data are based on 42 in. centers with tray supported as simple spans with deflection measured at the midpoint. Deflection factor: For lighter loads, deflection can be. The commonly used specifications are 100*50mm, 100*100mm, etc. The following is a description of the relevant content for your reference. Ladder tray is the most common and the most economical type of tray, also providing maximum ventilation for cabling. Rungs are fastened to the side. Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and industrial applications. Unitray is proud to be 100% Canadian owned and the following catalogue. It is quality assured to ISO9001 and meet the certificates of ABS, TUV, UL, CE, CGS etc. Manufactured with materials and features including Hot Dip Galvanized, Electrical Galvanized, Aluminum Alloy, Pre-galvanized,Stainless Steel and Fiber glass, there is a HDMANN product to suit your specific.