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Cable tray expansion and contraction problem solving

  • Categories:Zhongrui News
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  • Time of issue:2019-05-28 15:19
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(Summary description)Due to changes in ambient temperature, the steel cable tray will experience thermal expansion and contraction. The outdoor bridge is affected by temperature. For example, the maximum ambient temperature is 40 ° C and the lowest temperature is -20 ° C. The maximum shrinkage of the cable tray is obtained by the following formula: Δt=11.2 ×10-6×60deg (degrees)×1000mm

Cable tray expansion and contraction problem solving

(Summary description)Due to changes in ambient temperature, the steel cable tray will experience thermal expansion and contraction. The outdoor bridge is affected by temperature. For example, the maximum ambient temperature is 40 ° C and the lowest temperature is -20 ° C. The maximum shrinkage of the cable tray is obtained by the following formula:

Δt=11.2 ×10-6×60deg (degrees)×1000mm

  • Categories:Zhongrui News
  • Author:
  • Origin:
  • Time of issue:2019-05-28 15:19
  • Views:
Information
Due to changes in ambient temperature, the steel cable tray will experience thermal expansion and contraction. The outdoor bridge is affected by temperature. For example, the maximum ambient temperature is 40 ° C and the lowest temperature is -20 ° C. The maximum shrinkage of the cable tray is obtained by the following formula:
 
Δt=11.2 ×10-6×60deg (degrees)×1000mm
 
This leads to the conclusion:
 
When the temperature difference is 60 °C, Δι =0.672 mm/m
 
When the temperature difference is 50 °C, Δι = 0.560 mm/m
 
When the temperature difference is 40 ° C, Δι =0.448 mm / m
 
In the engineering design, the cable tray of the straight section should consider the expansion joint. The spacing of the expansion joint is recommended as follows:
 
50m when the temperature difference is 40 ° C;
 
40m when the temperature difference is 50 ° C;
 
40m when the temperature difference is 60 ° C

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