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Re: [TowerTalk] Tower Guy Anchors

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Tower Guy Anchors
From: Michael Tope <W4EF@ca.rr.com>
Date: Sat, 09 Nov 2013 09:28:57 -0800
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Thanks, Jim:

Both AB Chance-Hubbell and MacLean Power Systems sell them for utility applications:

http://www.hubbellpowersystems.com/anchoring/expanding/

http://www.macleanpower.com/products/item.asp?ITEM_ID=2087

Except for the W8JI site, I have never seen any mention of them as an option for ham radio towers.

I noticed that one of the entries in the table you linked to showed a depth of 73ft! I can't imagine that would be the requirement to get a good anchor, so perhaps that's how deep they had to go to get into the soil conditions that are listed.

73, Mike W4EF...........

On 11/9/2013 6:22 AM, Jim Lux wrote:
On 11/9/13 12:26 AM, Michael Tope wrote:
Except for mention on W8JI's website, I haven't seen much mention of
"bust open" anchors as an option for amateur tower guying:

http://www.w8ji.com/screw_in_guy_anchors.htm

I'd be curious to know if they would be a good choice for very sandy soil.


You'd need to talk to the anchor mfr.. That rusty thing on W8JI's site is interesting looking, but some casual googling didn't turn up anything useful.

The screw in anchors that are shown on that page are tiny little things, compared to some of the ones I've seen.

Here's a report from A.B. Chance (who make anchors) on "cohesionless soil"

http://www.abchance.com/wp-content/uploads/2012/07/01-9411.pdf

I'm not sure what the test condition was.. they're applying a specified load and reporting the deflection.
kips = 1000 pounds force.

so the first line, an 8 inch helix installed 19 feet down, shows 45,000 lb force with a deflection of 0.311 inches.. I assume the force is axial, but it doesn't say that.



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