Each section of tray and each fitting comes with 1 pair of splice plates and hardware, 2 pairs for Tees, 3 pairs for Crosses. If specified NEMA class rating is not known, please answer the following 3a. How many pounds per foot does the cable tray need to support? 3b. Siderail Height: The side rail height is defined as the outside height of the. Skipping a cable tray fill check during layout design leads to two costly outcomes: either the tray is oversized (wasting budget and space) or it is undersized, forcing a redesign after installation. When properly selected and installed, cable trays simplify routing, improve accessibility, and support future expansion while. Our free calculator helps you determine the correct tray size based on NEC and IEC standards. Follow these simple steps: Define Tray Dimensions: Enter the width and depth of your planned cable tray (in mm or inches). I'll walk you through how to nail down those prices efficiently, keeping things simple and straightforward. Costs vary based on tray material (steel, aluminum, or fiberglass), size, design (ladder or solid bottom), and installation complexity. Additional elements like supports, connectors, and brackets.