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Re: [TowerTalk] Tramming help sought

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Subject: Re: [TowerTalk] Tramming help sought
From: Wayne Kline <>
Date: Sun, 23 Nov 2008 16:39:52 -0500
List-post: <">>
I would tackle this rigging deli ma one of two ways.
A:  use my HD WB0X gin pole with  the  2" .250 wall pole. This giver a straight 
down pull by the capstan winch.
B:  I would mount a pulley on the mast above the tram line plate and  make the 
pull point a distance from the tower base .
Both these scenarios , you have the ability when the antenna is above the top 
plate to slacken the tension on the tram line ( come along ) swinging  the 
antenna back to it's resting/mounting  position.  this negate the re rigging it 
to it's mounting position
 my .02
 Wayne W3EA
  > Date: Sat, 22 Nov 2008 20:54:09 -0800> From:> To:> Subject: [TowerTalk] Tramming help sought> > I won't 
bore the readers with the usual retread questions.  Already did the reading 
etc. and lowered the old beam a month ago.  This is one on how to rig the haul 
line to pull up the 110 lb SteppIr yagi.> > The tram line is to be rigged about 
3 feet above the top on the Rohn 45 tower which has a flat top plate.  The boom 
will be mounted right above the top plate.  The tram line is continuous in that 
it goes thru a pulley and down to a 'back stay point'.  Trying to allow the 
tram line some ability to move but direct most of the force down the mast to 
the rotor.> > The beam will be hung from a sling that connects a pulley to the 
tram line.  The boom will hang about 18 inches below the tram line.  A 
tiller/torque arm will be attached 'behind' the boom, keeping the boom from 
rotating in two axes.> The haul line is half inch polyester double b
 raid and will be tied to the boom close to the CG point.  The bracket that 
holds the tram line above the tower top has a place for a pulley to be mounted 
for the haul line, probably attached with a snap link or shackle.  The question 
I have is how to rig the haul line's pulley such that I can  pull straight down 
and not have interference with the tower's top plate.  The bracket for the 
pulley is about 3 inches out from the mast and the tower needs about 9 inches 
clearance from the mast to go straight down without rubbing on the edge of the 
top plate.  I fear way too much friction if I allow this.  I lowered the prior 
beam this way and used the friction to advantage but do not want such issues 
when pulling up the new beam.> If I rig the haul line pulley ( a CMI 2.375 inch 
95% eff. rescue type) such that it is hanging out far enough to clear the top 
plate, I end up pulling sideways on the mast.> > There must be a standard 
practice here but I have not yet read any postings abou
 t this detail.  I usually just 'go for it' and keep the fingers crossed.  I 
have way too many PhDs in the School of Hard Knocks and prefer to not get 
another....> > If I can pull the beam up as far as it can get, to the haul line 
pulley, I plan to relax the tram line and let it settle the boom down where it 
will rest on the top plate until I can use other means to raise it the 6 inches 
to the boom to mast plate.> Willing to call to talk about it.> > Tnx in 
advance.> Al> N6TA> > Yeah, I'm missing the CW test due to delay in getting 
this up.> > > > _______________________________________________> > > > 
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