[TowerTalk] Message formatting

Dave Hachadorian k6ll.dave at gmail.com
Thu Apr 4 10:45:10 EDT 2019


I have seen an increasing number of posts such as the one below, where the 
text is all compressed into one hard-to-read paragraph.  Anyone know what's 
going on?  Maybe it's something on my end?  I don't think it's limited to 
Towertalk, but it may be limited to contesting.com.  I'm not sure.


Dave Hachadorian, K6LL
Yuma, AZ



-----Original Message----- 
From: Byron Tatum
Sent: Thursday, April 4, 2019 7:25 AM
To: Towertalk Reflector
Subject: [TowerTalk] 130' 45G Gyued Tower Questions

Hello-   I have some questions regarding the effects seen on anchor rods 
when installing first level of guys on a 130' 45G tower:           The tower 
is installed per Rohn 130 MPH specs, using same spacing, dimensions and 
angle of anchor rod (38 deg).  The anchor rod is made identical to the Rohn 
GAC5655TOP being 10' long, 1.25" high strength rod, 1/2" 50 KSI plate at top 
end of rod but with only 3 drilled 13/16" holes for turnbuckles, hole 
spacing same as Rohn (5655 anchor has 5 turnbuckle holes) and concreted in a 
concrete anchor built per Rohn AB3 dimensions.           I have the tower 
free-standing at 41' right now using a 5' concrete base section. A guy 
bracket was installed at 35' per Rohn spec and I attached the guy/turnbuckle 
to bottom hole in anchor rod plate and tensioned to around 600#. I am seeing 
the anchor rods bend downward to an angle of around 30 deg as I increase the 
tension on guy wire. It appears the rods have a very slight, just barely 
perceptible bow in them, possibly from the wrenching action of the pull 
being from several inches below the rod center (as plates are welded to rod 
and not pivoting).             I left the "slots" cut in ground (where 
anchor rod angles upward from top of concrete to surface of ground) unfilled 
as I wanted to be able to observe the effects on them and to install 
protective sheaths on them, where they exit the ground, when tower is 
finished plus to backfill these with clean sand. The rods were tarred and 
wrapped for corrosion protection.          I backed the turnbuckles off to a 
much less guy wire tension in order to reduce the downward pressure on 
anchor rods and to allow me to install cribbing under the turnbuckle plates 
to restore my anchor rod angle back to 38 deg.          This is the first 
tower that I have installed with fixed turnbuckle plates welded on an anchor 
rod. It seems that all of the ones in past had the pivoting turnbuckle 
plates and I did not notice these effects as the plates pivoted way upward 
with only bottom guy wire attached.          So my questions are --1. Has 
anyone else observed these things in installing a similar tower? Possibly if 
I had backfilled the anchor rods these effects would not have been as easy 
to detect.2. Would anyone have an opinion regarding using strong cribbing 
under the turnbuckle plates in order to maintain original installed rod 
angle of 38 deg. as I restore tension to around 600# on bottom set of guy 
wires?          I imaging that when I get the second level of guys 
installed, of which turnbuckle holes are centered on ends of anchor rods 
themselves, the rods will be pulled upward, closer to the installed angle of 
38 deg, and with installation of top set of guys all will balance out for 
rod angle of 38 deg.         My first experience with fixed turnbuckle 
plates on anchor rods. Thanks for any comments or advice.Byron W5FH
_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk 



More information about the TowerTalk mailing list