Fireproof cable trays in Australia must comply with AS/NZS3013:2005, ensuring 2-hour fire resistance and proper support systems for safe and reliable cable management.

Standards and Compliance

Fireproof cable trays in Australia are governed by AS/NZS3013:2005, which specifies fire-rated cable management systems with a WS5X classification capable of withstanding 2 hours at 1050°C . Compliance requires using certified trays, ladders, and support systems, and following manufacturer installation instructions to maintain fire rating integrity.

Types of Fireproof Cable Trays

• Cable Trays: Provide continuous support along the entire length, typically in 3m sections, suitable for light to medium loads .
• Cable Ladders: Offer higher strength with welded rungs, available in 3m or 6m lengths, ideal for heavy-duty applications .
• Ladder Trays and Mesh Systems: Designed for specific load requirements and environments, including high-risk or industrial sites .

Support Systems and Installation

• Trapeze Brackets: Single, twin, or multi-tiered supports for horizontal, vertical, or on-edge installation .
• Cantilever Brackets: Provide additional flexibility for heavy loads or complex layouts .
• H-Frame Assemblies: Floor-mounted supports for large cable runs .
• Load and Span Considerations: Maximum support spans depend on cable weight; shorter spans support heavier loads with less deflection .

Materials and Finishes

• Steel: Pre-galvanised or hot-dip galvanised for corrosion resistance .
• Powder Coating: Optional for aesthetic or non-reflective environments, including tunnels .
• Stainless Steel (316): For harsh outdoor or corrosive conditions .

Fireproofing and Passive Protection

• Cable Coatings and Wraps: Systems like Pyro-Safe Flammotect-A or FyreWrap prevent flame spread and maintain circuit integrity .
• Fire Rated Enclosures: Vermiculite sprays or fireproof boards can protect entire cable tray runs in critical areas .
• Penetrations: Fire-rated collars or cast-in plates ensure walls and slabs maintain fire compartmentation .

Suppliers and Resources

• EzyStrut: Offers AS/NZS3013:2005 certified trays, ladders, and custom solutions with full technical support .
• Burndy CSS: Provides a wide range of fire-rated cable support systems with load ratings up to 150 kg/m and various finishes .
• Kounis Group: Supplies flexible fire-rated cable trays and ladders with 2-hour fire rating and multiple support options .
• Ozstrut: Fire-rated trays for commercial and industrial projects, tested for circuit integrity .
• Trafalgar Fire: Specializes in passive fire stopping, cable coatings, and fireproofing systems for critical circuits .

Installation Best Practices

1. Select the correct tray or ladder type based on load, span, and environment.
2. Use certified support brackets and follow manufacturer spacing guidelines.
3. Ensure proper orientation: horizontal, vertical, or on-edge as required.
4. Apply fireproof coatings or wraps where necessary, especially at penetrations.
5. Verify compliance with AS/NZS3013:2005 and National Construction Code requirements.
6. Coordinate with suppliers for complete kits including trays, supports, fasteners, and accessories to simplify installation . By adhering to these standards and using certified products, fireproof cable tray installations in Australia can maintain circuit integrity, prevent fire spread, and ensure long-term safety and compliance.