Vertical supports for cable trays must comply with IEC 61537 and BS EN 61537, ensuring proper load-bearing, spacing, and fire-resistant installation.

Key Standards and Guidelines

IEC 61537 is the internationally recognized standard for metal cable tray systems, covering construction, testing, and performance requirements for cable trays and their supports, including vertical supports . Similarly, BS EN 61537 provides European guidance for cable ladder and tray systems, ensuring mechanical strength, durability, and safety . These standards specify that vertical supports must be designed to withstand the weight of cables, imposed loads, and environmental factors such as wind, ice, or vibration .

Material and Corrosion Protection

Vertical supports are typically made from steel, stainless steel, or aluminum, with galvanization or other corrosion-resistant coatings applied to enhance durability in industrial or outdoor environments . Fire-resistant materials are required for supports in critical installations to prevent premature failure during a fire .

Support Spacing and Load Considerations

The spacing of vertical supports depends on the type of cable tray, cable weight, and span length. IEC 61537 provides formulas to calculate working loads and safety margins, with common test spans at 1 m, 1.5 m, and 2 m . BS 7671 and IET guidance recommend that cables are supported at intervals that prevent undue mechanical strain and sagging, ensuring no stress on terminations . Vertical supports must also account for short-circuit forces and other imposed loads beyond the weight of the cables .

Installation Best Practices

• Supports should be installed plumb and securely anchored to walls, floors, or ceilings.
• Use system components designed and tested together to ensure compatibility and safety .
• Avoid using cable trays or supports as walkways or ladders to prevent personal injury and system damage .
• Fire-resistant and non-combustible materials should be used in areas where fire safety is critical .
• Bundled or long-length trays should be supported at multiple points to prevent bending or deformation during handling and installation .

Compliance and Certification

Manufacturers must provide test certificates demonstrating compliance with IEC 61537 or equivalent national standards. CE marking or third-party certification (e.g., UL, NEMA) may be required depending on the region . Adhering to these standards ensures long-term safety, mechanical integrity, and regulatory compliance. In summary, vertical supports for cable trays must be engineered to handle mechanical loads, environmental conditions, and fire safety requirements, following IEC 61537 and BS EN 61537 standards, with proper material selection, spacing, and installation practices to ensure reliable and safe cable management.