[Top] [All Lists]

[TowerTalk] Screw Anchor Question

Subject: [TowerTalk] Screw Anchor Question
From: Dennis OConnor <>
Date: Mon, 16 Jan 2006 05:19:37 -0800 (PST)
List-post: <>
 I have two towers, 130' lightly loaded and 150' with LARGE antenna loads - 
way, way beyond Rohns data for 25G...   They are installed with screw anchors 
into sandy ground... They have been up more than ten years without any incident 
or evidence of failure... Storms with recorded gusts to 89 mph have happened 
over those years... In Michigan we have freeze thaw cycles up the bungees...

So why does it work for this clueless ham? 
Well, ol clueless here designed and installed it so that there is a separate 
anchor for every 60 feet of tower, i.e. only two guys per anchor... And the 
steepest guy angle to any anchor is 45 degrees, while it's lower mate is 
roughly 30 degrees... My suspicion is that the tower sections will bow enough 
to gyrate and twist the tower down before the guy anchors will pull out...  
Limiting the load to each screw by keeping the guy wire angle low, is the key 
in my book...


Yahoo! Photos
 Got holiday prints? See all the ways to get quality prints in your hands ASAP.

TowerTalk mailing list

<Prev in Thread] Current Thread [Next in Thread>