What is the difference between sealed fireproof bridge and sealed metal bridge?

The main difference between sealed fireproof bridge and sealed metal bridge lies in their structure and function. Sealed fire-resistant cable trays are usually made of steel materials, which have high fire resistance and airtightness. It is usually used for important electrical equipment and critical facilities to protect wires and cables from damage in emergency situations such as fires. A sealed metal bridge is a type of cable tray made of metal materials that is primarily used to protect wires and cables from external environmental factors such as moisture and electromagnetic interference. In general, enclosed fire-resistant cable trays pay more attention to fire safety, while enclosed metal cable trays pay more attention to environmental protection and electromagnetic shielding.