This manual is designed to guide workers through the detailed production process of ladder cable trays, including the manufacture of horizontal elbows, tees, crosses, reducing bends, and vertical bends, with emphasis on precision, safety, and quality control. C-Channel Swage Ladder trays are prefabricated metal structures that consist of two side rails connected by individual transverse members or rungs. Rungs are fastened to the side. certification requirements and applications. Whether specifying a major new project, refurbishing existing facilities or doing the engineering, procurement and construction (EPC) for your end user, with T&B Cabletray, ABB offers reliable so utions du g conforming to ASTM A123 & ISO 1461 : m. Our cable ladder systems are available in Hot-Dip Galvanised (HDG) and stainless steel, with optional aluminium ladder trays for lightweight or corrosion-sensitive environments. Every model ensures full compatibility with Spina Group accessories and conforms to EN and UL standards. What's Involved in Producing Ladder. Introducing our Ladder Cable Trays in two exceptional designs: Rolled Flanged and Embossed Rolled Flange.