Ice or Cable Guards
A  severe  ice storm in 1998  caused the collapse of many  hydro and communication towers in eastern Ontario, Canada.  Radial ice build-up on  guy  cables  was  responsible  for  some of  the  damage.  Guy cables  became  detached  from  their  anchors, causing towers to collapse.  As temperatures rose after the ice storm was over,  the conductive properties of the steel cables warmed up first caused the heavy ice that had collected on the guys to melt from the inside out, causing the radial ice to slide down the guys with increasing velocity.  As the large chunks of  ice accelerated down the guy cables at a rapid rate,  they encountered the end of the preformed  guy-grips that  attached the guys to  the anchor.  The  impact  force  was so great  that the sliding,  cylindrical ice pushed the guys out of the performed guy-grips, causing the tower to collapse.                                                                                                                                                                                   

We install properly designed ice guards or ice breakers to prevent this from happening. These ice breakers are made of stainless steel, come  in  different  sizes and are  engineered  to split sliding ice and break it  apart  before  it can reach the pre formed guy grips, thus ensuring  tower  integrity  even during  inclement weather.  Installation  of  these ice breakers are of particular  importance on roof-top mounted towers.
An extra stainless  steel plate on the ice guard is designed for the connection of  stranded,  bare copper grounding cables that should be attached to each guy at each anchor. Galvanic corrosion resulting in greater resistance is reduced by using copper to stainless steel transitions. This prevents galvanic reaction between the zinc of the guy strands and the copper of the grounding cable and ensures a good discharge path for lightning induced currents.         
If proper ice guards are not available, hot-dipped galvanized or stainless steel wire clips should be used and attached about 6" above the upper end of the preformed wire grips that are being used. This will provide an artificial barrier to radial ice sliding down the guy cables, helping to prevent accelerating ice from pushing guys out of preformed guy grips.

(C) 2021 Alpha-Beta Communications Group Inc.

Our Commitment to Privacy: Alpha-Beta website is non-intrusive. We do not collect user data, send spyware to your computer, or use cookies to keep track of your browsing habits.