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Large-span ladder bridge

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Large-span ladder bridge

  • 大跨距梯式桥架
  • Category: Long-span bridge

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  • Release Date: 2019/05/17
  • Online Inquiry
  • Detailed introduction

梯式桥架生产

1. Selection of cable tray structure type

In engineering design documents, cable trays are generally referred to as “bridge trays” without specifying specific structural characteristics. The prices of cable trays of different types and materials can vary widely, and chaos in the structure type will cause heat dissipation at the work site Problems in mechanical protection. Therefore, in the design stage, designers should be required to reasonably select the structural characteristics of the cable tray according to the characteristics of the engineering environment and technical requirements, and clearly expressed in the model designation and material table of the plan.

2. Cable tray material selection

The material of Baotou cable bridge is another common problem in cable bridge engineering design. According to the material classification, cable bridges are mainly made of steel, glass fiber reinforced plastic and aluminum alloy. The characteristics of FRP cable tray are light weight, only 1/4 of the specific gravity of carbon steel; good water resistance and corrosion resistance, suitable for chemical plants. Non-combustible, flame retardant fiberglass cable tray with oxygen index ≥32. Long life, generally designed life is 20 years, but the price is three times that of steel cable trays. The advantage of construction is that the cutting is convenient, the assembly is flexible, and no fire is required for the installation. This is particularly significant for chemical plant projects in explosive hazardous environments and tight construction schedules, because in explosive hazardous environments, the chemical plant must be shut down during the installation of the project fire, economic Benefits will be affected. The weight of aluminum alloy cable tray is also very light. Due to the different specific gravity of aluminum and steel (Al = 2.7, Fe = 7.86), the ratio of aluminum to steel is about 1: 3 by weight. The dimensions and load characteristics of aluminum alloy cable trays are basically similar to those of steel bridges. In terms of cost, the cost of aluminum alloy bridges is 20% higher than that of galvanized steel cable bridges, and the service life is more than 5 times that of steel cable bridges.

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Keywords: Ladder bridge , Ladder bridge production , Ladder bridge processing

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