Should pre-made cable tray tees be used

Cable tray tees do not strictly require pre-made tees, but pre-fabricated tees are commonly used for convenience, standardization, and compliance with specifications.Pre-Made TeesCable tray systems offer pre-fabricated tees, including equal and unequal types, for light, medium, and heavy-duty applications with widths ranging from 50mm to 900mm . These tees are manufactured in materials such as mild steel (pre-galvanized or hot-dip galvanized) and stainless steel, and they often come with ventilated or solid covers . Using pre-made tees ensures consistent dimensions, structural integrity, and compliance with standards like IEC 61537 .On-Site FabricationWhile pre-made tees are convenient, it is possible to fabricate tees on-site by cutting and joining sections of straight cable trays. This approach may be used when custom dimensions are required or when pre-made tees are unavailable. However, on-site fabrication requires careful attention to mechanical strength, alignment, and corrosion protection, and may not meet all standard compliance requirements without proper finishing .Practical ConsiderationsEase of installation: Pre-made tees reduce labor and installation time.Standardization: Ensures compatibility with existing tray systems and accessories.Material and finish: Pre-made tees are available in finishes that match the tray, such as pre-galvanized or hot-dip galvanized steel .Custom requirements: Unequal or non-standard branch widths may necessitate on-site fabrication or special-order tees . In summary, while pre-made tees are not strictly required, they are widely used for efficiency, safety, and compliance. On-site fabrication is possible but requires careful planning and adherence to standards.