Requirements for Angle Steel for Cable Tray Fixing Brackets

Angle steel for cable tray fixing brackets must be made of corrosion-resistant steel, sized to support the tray load, and installed according to spacing and fastening standards.

Material and Corrosion Protection

Angle steel used for cable tray brackets is typically mild steel, galvanized steel, or stainless steel depending on environmental conditions . Galvanization (pre-galvanized or hot-dip) is recommended for protection against corrosion, especially in industrial or outdoor environments . Stainless steel grades such as AISI 316L are preferred in highly corrosive or chemical-prone areas . The steel must withstand mechanical loads, including the weight of cables and any additional forces such as wind or seismic activity .

Dimensions and Load Capacity

The thickness and size of the angle steel are determined by the cable tray width, tray height, and expected cable load. Standard support constructions, such as the RS 60 system, use angle steel brackets capable of supporting trays with rail heights of 60 mm and widths from 100 to 300 mm . Brackets must be designed to handle the maximum permissible cable dead weight and maintain structural integrity over the support span.

Bracket Types and Installation

Common bracket types include cantilever brackets (KTA, KTUG), pendant brackets (HUF, HDUF), and wall-mounted brackets (TKS, KTAG) . Brackets are typically fastened to the ceiling or wall using M10 threaded rods, anchor bolts, or verified ceiling brackets. For ceiling installations, the back of the bracket may require stiffening with spacers to prevent deflection . Cable trays are secured to brackets using mushroom head bolts (e.g., FLM 6x12 or FLM 6x16) .

Support Spacing

The support distance (spacing between brackets) is critical for load distribution. It is determined based on tray type, cable weight, and environmental factors. Standard guidelines recommend calculating spacing to ensure that the tray does not sag or deform under load . Additional loads such as snow, wind, or vibration must be evaluated by the project engineer.

Compliance and Standards

Angle steel and bracket assemblies must comply with DIN EN 61537 or BS EN 61537 for cable support systems . This ensures that the materials, dimensions, and installation methods meet safety and mechanical performance requirements. Accessories and mounting elements should be compatible with the tray system to maintain structural integrity and fire safety.

Summary

• Material: Mild steel, galvanized steel, or stainless steel (316L for corrosive environments)
• Dimensions: Sized for tray width, height, and cable load
• Brackets: Cantilever, pendant, or wall-mounted with proper stiffening
• Fastening: M10 threaded rods, anchor bolts, or verified ceiling brackets
• Support spacing: Determined by load and tray type, per standards
• Standards: DIN EN 61537 or BS EN 61537 compliance required Following these requirements ensures that cable trays are securely supported, corrosion-resistant, and compliant with industrial installation standards .