Towers

 
Guying
 
Wires & Terminals
 
 


PA1A uses Parafil, which is similar to Phillystran tower guy wires. The excellent dielectric properties of aramid fiber plus it's strength-to-weight ratio five times greater than steel

rope diameter: 17mm. Nom. breaking load: 50.000Nm. Fiber core diameter: 12mm. Approx. wt in air: 22kg/100m

     
 

because the Guy-wire terminals are not new, I had to clean them first. The Parafil jackets were burned for a small amount time with high temperatures. This would cause the pin go off easier and after this I used the below gear to make the as new from the factory. For the first tower I will only need 12 times, 5-Ton terminals.


     
 


A= 188mm. L=20mm. B=20mm. 1=5T terminal 2=Spike 3=Clevis and split pin. 0=44mm

Step 1:
Using a knife to cut the 17mm fiber rope.

Step 2:
Cut 80mm exact from the end

     
 

Step 3:
Avoid cutting the fibres.

Step 4:
Install the terminal.

     
 

 

Step 5:
Allow the fibres to fall back.

Step 6:
Install the spike and pull the rope down.

Step 7:
Tap the spike gently but firmly home whilst pulling down the rope.

     
 

Step 8:
Waterproofing with silicone rubber compound.

Step 9: Complete the assembly by fitting back seals into a location groove.

Step 10:
Futher waterproofing can be achieved at the nose of the terminals by overwrapping with self amalgamating tape.

I use Coax-Seal & Densoband for this. The terminal made from anodised aluminium alloy are ready for use.

     
 

Creep is the continuing extension of a material under load. All materials creep to greater or less extent. Parafil synthetic fiber ropes have relatively low levels of creep. Our towers in operation will not need any re-tensioning, even after 15 years of service


Waterproofing: The presence of water inside the Parafil ropes has no effect on the strength characteristics.

     
 

To utilize these properties to a maximum advantage I use end connectors (terminals) based on a conical wedge principle. The advantages of using this kind of material for guy wires: they eliminate EMI and RFI and other problems associated with steel cables such as signal suppression, directional irregularities, zapping and white noise, arcing associated with ceramic insulators, and interferences with others

     
 

I have used not equalizers on the anchors, because there is sufficient creep within the guywires of this material.Turnbuckles will have been used. There are several methods of attaching the guy-wires to a tower, but never forget the safety wire passing through the turnbuckles in a figure eight. This is to prevent the turnbuckle from working loose...!

The last 6ft of the 55ft guy wires are fastened with 10mm (0,39") stainless steel wires. The turnbuckles are half tensioned.

     
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