I have to wonder if a permitting authority would allow these for
permanent structures without a soils test and engineering, and costs.
(Utilities run on different rules). Then a truck and hydraulic system
is needed to install them, more $$. All of this beyond even advanced
ham skills and technology.
A rental mini-excavator, some rebar ordered bent to spec, and a few
yards of concrete can be DIY. My (Rohn65) anchors are 2x4x6', full
rebar cages, buried 4' all DIY with some laborer help. One advantage is
the shank before backfull is available to be tar coated and 0.020" gas
pipe tape wrapped so there is no chance of corrosion failures. (see TT
posts of anchor shank failures).
My smaller prior R25 built to Rohn spec tower anchors and base were all
hand dug, rebar bent on site and Sakrete mixed in wheelbarrows with
friends and 807's..
Grant KZ1W
On 4/14/2020 04:02, Tyler Stewart via TowerTalk wrote:
It’s like anything else, if engineered and installed properly there is nothing wrong with
earth anchors. Lots are in use at big stations for decades successfully. Improper
concrete based anchors are just as bad.
Ty K3MM
Sent from AOL Mobile Mail
Get the new AOL app: mail.mobile.aol.com
On Tuesday, April 14, 2020, Rob Atkinson <ranchorobbo@gmail.com> wrote:
I've never owned a tower but I would think the guy anchors need to be
set in a relatively deep hole that is filled with concrete. I don't
think I have ever seen a commercial tower that didn't have guy anchors
in concrete. I would not trust guying a tower by merely screwing any
kind of anchor into the ground. How tall is your tower? Maybe 60
feet of R25 is okay if you screw the helix deep, like 5 feet or more
but if you live anywhere with high winds, or soft soil, lots of rain,
or huge wind load like a TH7, I'd pour concrete. It's money spent up
front that saves on the replacement cost of a tower and antenna(s).
73
Rob
K5UJ
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|