Fixing of longitudinal cable trays

Longitudinal cable trays should be securely fixed using appropriate support elements, mounting accessories, and spacing to ensure mechanical stability, load capacity, and compliance with standards.

Support and Fixing Elements

Cable trays are supported using wall brackets, suspended supports, center suspensions, and floor fixings depending on the installation location (ceiling, wall, or floor) and tray type (ladder, perforated, or wire mesh). Mounting elements such as plates or clamps are used to attach trays to these supports, while accessories like joints, expansion joints, and separators maintain alignment and accommodate thermal expansion. Materials commonly used include hot-dip galvanized steel, stainless steel, and aluminum for corrosion resistance and durability.

Installation Guidelines

Support Spacing: For center-hung trays, the maximum support spacing is typically 3. 6 meters, with a maximum load per hanger ranging from 318 kg to 340 kg depending on tray type. Alignment and Leveling: Ensure trays are level and aligned longitudinally.

Use expansion joints where long runs may experience thermal expansion or contraction. Handling and Storage: Offload trays carefully to avoid crushing or bending. Store trays on dunnage to prevent contact with moisture or uneven surfaces.

Attachment: Use appropriate fasteners and mounting plates to secure trays to supports. Avoid using trays as lifting points for forklifts or chains.

Safety and Standards

Follow local electrical codes and standards such as DIN EN 61537 for cable support systems. Ensure mechanical stability under environmental conditions like wind, snow, or vibration. Use personal protective equipment (PPE) during installation.

Verify load capacity and spacing to prevent sagging or structural failure.

Accessories for Longitudinal Runs

Joints and expansion joints: Maintain continuity and compensate for thermal expansion. End edges and separators: Protect cables and organize multiple runs. Wall and floor supports: Provide additional stability for long horizontal or vertical runs.

By following these guidelines, longitudinal cable trays can be installed securely, ensuring mechanical integrity, electrical safety, and long-term durability in industrial or infrastructure applications.