How do we design a preformed dead-end for customers?

Author: C

Time: 2022/8/17

The formation of a satisfactory preformed dead-end includes two processes:

1. Basic design principles:

• Conductor diameter

• Inside rod diameter

• Applied overall diameter

• Rod Diameter

• Pitch length

• Length

  
  

Generally speaking, according to the model name and span of the cable used (the distance between two poles), we can tell the approximate weight of the cable, so as to judge the size range.

For example, a 100m span ADSS cable (G.W.＞100kgs): 5 steel wires with corresponding steel wire diameter 3.0mm; Or 6 steel wires with diameter2.3/2.5mm.

Remark: it is necessary to consider the natural environment: wind speed, icing degree, etc.

2. Holding strength design:

Typical holding strength curve illustrates that the holding strength and the applied length are not proportional. A safety factor of approximately one pitch length is designed into the preformed dead-ends. In order to make the preformed dead-ends have a pressing force on the cable, the overall rod diameter(see picture1) after molding will be lower than that after installation.

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