Fire-resistant cable tray features:

Fire-retardant bridge supports are coated with a layer of fire-resistant plastic powder on the surface of the standard bridge supports! In reality, the bridge support itself won't catch fire; it's only the cables that could potentially ignite.

The protective thickness of fire-resistant bridge channels complies with Table 10 of JB/T 10216-2000 "Cable Bridge for Electric Control and Distribution," requiring electroplating over 12μm and hot-dipping over 65μm.

Powder coating over 50μm, flame retardant over 500μm, can be measured with a thickness gauge.