[TowerTalk] Galvanic Protection of Guy Anchors
Jim Thomson
jim.thom at telus.net
Fri May 31 12:34:45 EDT 2019
On a side note, a buddy across town buried the 1st 3 feet of his galvanized tower directly into the ground, adjacent to his garage.
This was at a rental home, so the idea was not to pour a concrete base. Tower was bracketed to the garage, at about 8 ft above ground.
Tower was temp guyed, and was 50 ft tall. After 10 years the tower was removed. The portion that was embedded in the soil was almost dissolved !
Depending on whether the soil is acidic .....or alkaline plays a big part in the demise of galvanized material in soil.
IMO, a better method to terminate guy lines is to use a steel tube embedded in concrete. I did that back in the early 80s, with a thick flat plate welded to the
4.5 inch OD tubing. Plate was punched with 3 x 1 inch holes. Inside of the tube is filled with concrete..and slightly domed on top. A buddy also uses this scheme, using 6 inch OD tubing for his
120 ft tower. Another buddy uses 10 inch tubing for his 190 ft tower. Tubes are typ 3-5 ft above ground. I have also seen H and I beams used. In all these cases, the tubes were hot dipped
galvanized....ditto with H and I beams.
Jim VE7RF
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