[TowerTalk] Tower Guy Anchors

[Michael Tope]

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.
>