Problem: Openings at fire-rated walls or floors allow fire spread through trays.

Cause: Neglecting fire-stopping requirements or using non-fireproof materials.

Solution:

• Seal tray penetrations at fire barriers with fireproof sealing materials;

• Use fire-rated trays or apply fireproof coatings;

• Inspect fire seals regularly for completeness.

Problem: Misaligned bends or gaps at joints, reducing structural strength.

Cause: Use of non-standard fittings or on-site improper cutting.

Solution:

• Use manufacturer-provided elbows, tees, and crosses;

• Deburr and coat cut edges with anti-rust paint;

• Plan the routing and bending angles before installation.

Problem: Cables overheat, causing insulation aging or damage.

Cause: Overfilling trays beyond design capacity or poor ventilation.

Solution:

• Keep cable filling rate ≤ 40% (maximum 50%);

• Use perforated trays or add ventilation holes in high-temperature areas;

• Install multiple tray layers if necessary.

Problem: Loose bolts, deformed trays, or missing cable labels.

Cause: No established maintenance schedule after installation.

Solution:

• Implement a regular inspection plan (recommended every 6 months);

• Check fasteners, supports, and grounding connections;

• Update cable labels and layout drawings after modifications.