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Re: [TowerTalk] questions on the use of a man-bucket and guy tensioning

To: <TexasRF@aol.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] questions on the use of a man-bucket and guy tensioning 5/16"...
From: "StellarCAT" <rxdesign@ssvecnet.com>
Date: Wed, 12 Oct 2016 07:54:35 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Hi Gerald,

Actually I’m use to using grips and have done many towers...  I’ve done it all 
before – I’ve just not used 5/16” and don’t know if in situ I’ll be able to 
estimate it accurately. I have 3 older grips that will function as the 
‘connection point’ for pulling each guy. What I don’t have is three come 
alongs. I have instead, what I used on the 1/4” guys, are three ... I’m not 
sure what you’d call them... they’re rope and there is a block with a rotating 
cog in it that locks on the rope when you pull it through adding tension in the 
process... I don’t know if they’re able to handle any more than about 150# of 
pull – so there is my question ... if I get to that amount of pull will the 
turnbuckles have enough room to pull them from there to full 1100#? I’ve Google 
searched to see if there is a chart of initial tension and how fast say per 
inch of displacement of the turnbuckle the force goes up ... its obviously a 
non-linear curve. 

and I’m having trouble getting people to just lift and stage the antennas let 
alone with any experience at the guys so its looking more like I’ll be running 
from one to the other (140’ out from the base and not a direct shot from one to 
the other). I’ll get my work out. 

thanks Gerald. 

Gary 


From: TexasRF@aol.com 
Sent: Tuesday, October 11, 2016 9:15 PM
To: rxdesign@ssvecnet.com ; towertalk@contesting.com 
Subject: Re: [TowerTalk] questions on the use of a man-bucket and guy 
tensioning 5/16"...

Gary, you are on a steep learning curve! Most installers use a come-a-long to 
pull the initial guy tension and hold the guy in position while the lower guy 
grip is installed.

If you install the grip about 75% it is relatively easy to remove and 
reposition the grip. Once installed 100% you likely will destroy the grip 
trying to remove it. Once you are sure of the proper position it is easy to 
complete the grip installation.

After the first few grips are installed you will get the hang of it and get the 
position correct on the first try.

If you have a man on each anchor it will go a lot quicker but you will need 
three of the come-a-longs for best speed. a half installed big grip makes a 
quick method of attaching the come-a-long to the guy. Some installers use a 
"pork chop" (I forget the actual proper name) to grab the guy cable; perhaps 
you already have three of these.

73,
Gerald K5GW


In a message dated 10/11/2016 7:18:06 P.M. Central Daylight Time, 
rxdesign@ssvecnet.com writes:
  Hello,

  This is directed at those that have had direct experience with the use of a 
crane and a man bucket. 
  My antenna/tower project, at least the major part of it (one of the two 
towers) is finally getting close to being done. I’ve ordered the crane for the 
end of next week ... so I can get a man bucket for an additional $150. There 
are 6 large yagis to be installed – well 5 and a rotary dipole for 80/75 which 
is also BIG in that regard ... there’s currently 74’ of tower up on the K0XG 
rotating base and 2 rings ... I’ve built another 60’ of tower with the second 
ring on it ... that will go up first and the top section of guys installed. 

  then I have 14’ of tower that will already have mounted on it (I hope) the 
rotary dipole at the top and a 5 element 50’ boom 20 mounted just above the leg 
of the tower (R55). That whole assembly will go up as one and thus 2 antennas 
will be finished once this is bolted in to place. 

  Then there are 4 yagis to go up along the height of the tower from 124’ down 
to 45’. I had planned on just having a guy on the tower stuff (no choice there 
of course) ... and then have him climb down the tower as we go from the top 
down with the 4 remaining antennas 124’, 90’, 75’, 45’. This means I’ll have to 
lash up the antenna on the ground to the crane hook and then of course the 
crane will raise it up to him where he can hopefully bolt it in place (2 plates 
on the boom already in place for the boom to tower mount). 

  But the guy that is doing the climbing is saying the man bucket will make 
putting the antennas up easier. Having never used one I’m writing to get the 
comments of those that have used one. 

  How is the antenna ‘held’ to the man bucket? And whatever that is does that 
get in the way of mounting the antenna when at the tower. I.e. you have the 
side rails of the man bucket that would be ‘hitting’ the tower – will the 
antenna ‘move in” to position and still be SAFELY held until bolted in place? 

  Is it really any faster? 

  I assume it could be considered safer as the guy would be in the man bucket 
and not climbing the tower but obviously one expects whomever that is to be 
careful and always be strapped in when climbing ... 

  thoughts please? 

  And on another note: the top guys are 5/16” mixed with 11200# philly (50%) 
... how much tension do you need to pull out of the ‘free’ cable before 
attaching it to the turnbuckle? I’m worried about not pulling enough and having 
to redo the big grip ... on the bottom set of guys (the bottom 2 sets are 1/4”) 
I managed to do just that – I pulled too much and had to redo the big grip. Of 
course on the 5/16” the worry is more that I won’t pull enough and will run out 
of turnbuckle adjustment space. Put another way: how fast does the tension go 
up as one adjusts the turnbuckle? If the turnbuckle has 12” range – will that 
pull up even a relatively loose guy to full tension of 1100# before running out 
of adjustment room? 

  Gary
  K9RX
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