Cable tray binding frames for vertical shafts are fabricated using steel or stainless steel components, designed to support vertical cable loads safely while complying with standards like DIN EN 61537 and BS EN 61537.

Material Selection and Components

Cable tray binding frames are typically made from steel or stainless steel, with optional galvanization or protective coatings to prevent corrosion in industrial environments . The system consists of:

• Cable support lengths (trays, ladders, or mesh trays)
• Support fittings (angles, brackets, clamps)
• Mounting elements (anchors, bolts, and fasteners)
• System accessories (spacers, binding straps, and connectors) These components are designed to secure cables in vertical shafts, prevent sagging, and withstand mechanical loads, including forces generated during short circuits .

Design Considerations

When fabricating a binding frame for vertical shafts:

• Load capacity: Ensure the frame can support the weight of cables and any dynamic loads.
• Spacing: Vertical supports should be spaced according to cable weight and tray type, typically following manufacturer guidelines.
• Accessibility: Allow for cable entry and exit points at multiple levels for maintenance and future expansion .
• Safety: Frames must not be used as walkways or for personnel support; they are strictly for cable support .

Fabrication Process

1. Measure the shaft dimensions and determine the required tray lengths and frame height.
2. Cut and assemble steel or stainless steel supports using welding or bolted connections, ensuring alignment and vertical stability.
3. Install mounting brackets or anchors at regular intervals along the shaft walls.
4. Attach cable trays to the frame using clamps or bolts, ensuring trays are level and securely fastened.
5. Add binding straps or cross braces to prevent lateral movement of trays and cables.
6. Inspect and test the assembly for mechanical stability and compliance with relevant standards .

Standards and Compliance

• DIN EN 61537: Specifies requirements for cable tray systems, including mechanical strength and installation practices .
• BS EN 61537: Provides guidance for cable ladder and tray systems in the UK, including vertical installations .
• CE marking and third-party certification: Ensure components meet European directives and are certified by recognized bodies such as UL, IMQ, or NEMA .

Maintenance and Safety

• Regularly inspect vertical frames for corrosion, loose fasteners, or deformation.
• Ensure cables are properly supported and not overstressed.
• Maintain clear access for inspection and future cable additions . By following these guidelines, a robust, compliant, and safe cable tray binding frame can be fabricated for vertical shafts, ensuring long-term reliability and ease of maintenance.