Composite channel bridge

High mechanical strength; combines the rigidity of metal bridge structures with the flexibility of fiberglass bridge structures. Excellent corrosion resistance, strong anti-aging properties, attractive appearance, easy installation, and long service life. Epoxy resin and epoxy resin composite cable trays are suitable for use in harsh corrosive environments, large spans, and heavy load conditions.

Section 1: Description of Model Coding for Epoxy Resin Composite Cable Trays

Model numbering of epoxy resin composite cable trays is divided structurally into:

1. Channel (C) 2. Treaded (T) 3. Pallet (P)

High mechanical strength; combines the rigidity of metal bridge structures with the flexibility of glass fiber reinforced bridge structures. Excellent corrosion resistance, strong aging resistance, aesthetically pleasing design, easy installation, and long service life. Epoxy resin and epoxy resin composite cable trays are suitable for use in harsh corrosive environments, large spans, and heavy load conditions.

Epoxy Resin Composite Cable Tray Model Coding Instructions:

Section II: Selection of specifications for epoxy resin composite cable tray

The cable fill rate should not exceed the standard规定的 value; for power cables, it can be 40-50%, and for control cables, it can be 50-70%. Additionally, a reserve of 10-25% for engineering development should be allocated. The selection of bridge tray cross-sectional area is shown in the table below. All types of bends and accessories should meet the engineering layout requirements and be compatible with the bridge tray.

Section 3: Selection of Load Class for Epoxy Resin Composite Cable Trays

Cable trays should include not only their own weight but also the mechanical load they can bear for electrical wires and cables. The working uniformly distributed load should not exceed the rated uniformly distributed load of the selected load class. When the cable tray bears the rated uniformly distributed load, its relative deflection for epoxy resin and epoxy resin composite types should not be greater than 1/200.

High mechanical strength, combining the rigidity of metal bridge structures with the flexibility of glass fiber reinforced bridge structures. Excellent corrosion resistance, strong aging resistance, attractive appearance, easy installation, and long service life. Epoxy resin and epoxy resin composite cable trays are suitable for use in environments with severe corrosion, large spans, and heavy loads.

Section 1: Compilation Instructions for Model Numbers of Epoxy Resin Composite Cable Trays

Epoxy resin composite cable tray model numbering is categorized structurally:

1. Slot Type (C) 2. Tread Type (T) 3. Pallet Type (P)

High mechanical strength, combining the rigidity of metal bridge structures with the flexibility of glass fiber reinforced bridge structures. Excellent corrosion resistance, strong aging resistance, aesthetically pleasing design, easy installation, and long service life. Epoxy resin and epoxy resin composite cable trays are suitable for use in harsh corrosive environments, large spans, and heavy load conditions.

Description of cable tray model numbering for epoxy resin composite type:

Section 2: Selection of specifications for epoxy resin composite cable trays

The cable fill ratio should not exceed the standard规定的 value, with power cables ranging from 40-50% and control cables from 50-70%. Additionally, a reserve of 10-25% for engineering development should be allocated. The selection of bridgeway cross-sectional area is as shown in the table below. Various elbows and accessories should comply with the engineering layout and be compatible with the bridgeway.

III. Selection of Load Ratings for Epoxy Resin Composite Cable Trays

Cable tray should include not only its own weight but also the mechanical load it can withstand for electrical wires and cables. The working uniformly distributed load should not exceed the rated uniformly distributed load of the selected load class. When the cable tray bears the rated uniformly distributed load, its relative deflection for epoxy resin and epoxy resin composite types should not be greater than 1/200.

The strength of the load-bearing capacity for epoxy resin composite cable tray is crucial to the reliability and durability of the structure, serving as an important basis for structural design. In actual use, besides the cable load and its own weight, the following loads should also be considered:

1. Outdoor cable trays must account for loads from wind, rain, or ice; in seismic-prone areas, inertial loads should also be considered.

2. Cable trays, in principle, should not be used as pedestrian pathways in addition to bearing normal mechanical loads. For use as pedestrian pathways or other purposes, special designs for this purpose should be negotiated with the customer.

3. In the design of cable tray load, it is not only necessary to consider the vertical load but also the longitudinal and lateral loads that may exist during installation and use (such as the longitudinal traction force generated when laying cables and the lateral load caused by a ladder leaning against the tray).

Section 4: Configuration of环氧树脂Composite Cable Tray Supports and Hangers

1. Indoor support and suspended spans typically range from 1.5 to 3 meters. Outdoor pillar spans usually measure 6 meters.

2. The support and suspension configuration of non-linear sections should adhere to the following principles: When the bridge width W < 300mm, a support or suspension should be installed on the side of the straight section, 300-600mm from the junction with the non-linear section; when the bridge width W > 300mm, in addition to meeting the above conditions, an additional support or suspension should be added in the middle of the non-linear section.

3. When setting up multi-layer bridge racks, the center distance between layers is 200, 250, 300, and 350mm.

V. Technical Requirements for Epoxy Resin Composite Cable Trays

The structural design is rational, featuring aesthetic appearance, smooth surface, consistent thickness, high mechanical strength, easy installation, and resistance to corrosion and aging.

The bridge supports are made of epoxy resin composite material, lined with a metallic frame. The shape of the metallic frame matches the cross-section of the cable bridge. The material is cold-rolled steel plate with a thickness of 1.5-2.0mm (150≤B≤300: 1.5mm, 400≤B≤800: 2.0mm). The metal surface must undergo special treatment and include a soft bonding layer to prevent delamination between the metallic frame and the main anti-corrosion layer due to different thermal expansion coefficients.

The bridge supports are coated with a primary corrosion-resistant layer over the metal frame, with an average thickness of 1.5mm-2.0mm and a density of 1.7-2.0g/cm³.

The primary anti-corrosion layer must be externally protected with a high-density, damage-resistant layer that reflects ultraviolet rays, ensuring a smooth and aesthetically pleasing surface to enhance the aging performance and service life of the cable tray.

The lining is made of glass fiber fabric, which is woven from three-no (no alkali, no wax, no twist) glass fibers.

The filling material is made of lightweight aluminum hydroxide to reduce its own weight, thereby enhancing the load-bearing capacity of the cable tray.

The bridge supports are equipped with measures to prevent strong corrosion, strong external forces on any end surface, connection surface, and connection holes.

The main anti-corrosion layer, bonding layer, and protective layer are required to be formed in one hydraulic molding process.

Corrosion-resistant, with a lifespan of up to 30 years in harsh environments such as acidic, alkaline, saline, and ammonia, without aging or fading.

The flame-retardant oxygen index of the cable tray is not less than 30%.

The connecting bolts are made of stainless steel bolts.