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Shandong Hongfeng Electric Group Co., Ltd.

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How to deal with the problem of expansion and shrinkage of cable tray

Release time:

2023-12-18

How to deal with the problem of expansion and shrinkage of cable tray, we can solve the problem according to the following

How to deal with the problem of expansion and shrinkage of cable tray, we can solve the problem according to the following.
Due to the change of ambient temperature, the phenomenon of thermal expansion and cold shrinkage will occur in steel cable tray.
The outdoor bridge is greatly affected by temperature. for example, if the highest environmental temperature is 40 ℃ and the lowest temperature is-20 ℃, the maximum shrinkage of the cable tray is obtained according to the following formula:
Δ t = 11.2 × 10-6×60deg (degrees) × 1000mm.
As a result, it is concluded that:
When the temperature difference is 60 ℃, Δ = 0.672mm/m.
When the temperature difference is 50 ℃, Δ = 0.560mm/m.
When the temperature difference is 40 ℃, Δ = 0.448mm/m.
In the engineering design, the telescopic joint should be considered in the straight line cable tray, and the spacing of the telescopic joint should be determined as follows:
When the temperature difference is 40 ℃, it is 50m.
When the temperature difference is 50 ℃, it is 40m.
When the temperature difference is 60 ℃, it is 40m.

Keywords：

What are the components of the cable tray?

Installation skills and specification of cable tray bracket

What are the components of the cable tray?

Installation skills and specification of cable tray bracket