In the section with fire protection requirements, the cable tray can be added with fire-resistant or flame-retardant boards, nets and other materials in the cable ladder and tray to form a closed or semi-closed structure, and the surface of the bridge and its support and hanger can be used. For measures such as painting fire-resistant coatings, the overall fire-resistant performance should meet the requirements of relevant national codes or standards. In places with high engineering fire protection requirements, aluminum alloy cable trays should not be used.
Under the same specifications, the flame-retardant cable tray is 2.2 times more expensive than the steel cable tray, the service life is more than 5 times that of the steel cable tray, and the weight is 30% heavier than the steel cable tray. The fire-proof cable tray is slightly more expensive than the steel cable tray, the service life is more than 3 times that of the steel cable tray, and the weight is basically the same as the steel cable tray.
