When it is necessary to shield the cable network from electrical interference or when there is a requirement to protect against external influences (such as corrosive liquids, flammable dust, etc.), (FB) type slot type composite anti-corrosion shielding cable tray (with cover) should be selected.
Strong corrosive environments should use (F) composite epoxy resin anti-corrosion and flame-retardant cable trays. The bracket should also be made of the same material to improve the service life of the cable tray and accessories. Cover plates should be added in environments or outdoor areas that are prone to dust accumulation and require covering.
In addition to the above situations, tray type trough type stepped glass anti-corrosion flame-retardant cable trays or steel ordinary cable trays can be selected according to the on-site environment and technical requirements. Cover plates should be added in environments or outdoor areas that are prone to dust accumulation and require covering.
在公共通道或户外跨越道路段，底层梯级的底部宜加垫板或在该段使用托盘 。 大跨距跨越公共通道时，可根据用户要求提高桥架的载荷能力或选用行架。
In public passages or outdoor crossing road sections, it is advisable to add a pad at the bottom of the bottom step or use a pallet at that section. When crossing a public passage with a large span, the load capacity of the bridge can be increased or a gantry can be selected according to user requirements.
Composite cable trays (FB) should be used for large spans (>3m).
Selection of cable tray specifications
The width and height of the composite epoxy resin cable tray should be selected according to the following table, and should comply with the cable true filling rate not exceeding the specified values of relevant standards and specifications. Power cables can be taken as 40-50%, control cables can be taken as 50-70%, and a process development margin of 10-25% should be left.
The specifications of various bends and accessories should comply with the engineering layout conditions and be matched with the bridge.
The selection of support and hanger specifications should be based on conditions such as bridge specifications, layers, spans, etc. And it should meet the requirements of the load.
Composite epoxy tree finger bridge (F) should be selected for outdoor use.