With an antenna that heavy, I think I would rather go with the PITA of
loosening the guys and taking one guy off, one level at a time and pulling
it up the side of the tower. Or, a crane.
Chuck W5PR
On Sat, Sep 14, 2019 at 11:16 AM Charles Morrison <junkcmp@gmail.com> wrote:
> And yes, I will back guy the target tower.
> Using this rope calculator for two different height anchors, I set one end
> at H= minus 40ft to simulate the load lifted. and set the other height to
> 92, which adds up to the total height. Total tension = 1529 lbs. at that
> point.
> I realize the forces will change as the load position changes.
>
>
> https://www.ropelab.com.au/two-point-anchor-calculator-2/?fbclid=IwAR1VmtTjTBDz37LrllZcp38nRUhBya9j06djqytUMxv6DI2-X32ZLRFPndw
>
> H1= 175
> The horizontal distance from anchor 1 to the load.
> V1= -40
> The vertical distance from anchor 1 to the load.
> H2= 135
> The horizontal distance from anchor 2 to the load.
> V2= 92 (132-40)
> The vertical distance from anchor 2 to the load.
> Load = 313
> The weight of the load.
> Calculations:
> L1= 179.5
> The calculated length from the load to anchor 1.
> L2= 162.5
> The calculated length from the load to anchor 2.
> T1= 701
> The line tension to anchor 1.
> T2= 828
> The line tension to anchor 2.
> Included angle: 158 deg
> The angle between strands at the load. (180 degs = zero sag)
>
> On Sat, Sep 14, 2019 at 10:02 AM Charles Morrison <junkcmp@gmail.com>
> wrote:
>
> > Will this work using a TRAM system and not a crane ?
> >
> > Antenna to raise: 310 lbs x 48ft boom to be installed at 123'
> > Tower: 132' 55G (130MPH guying) with starguy at 122'
> > Tram wire: 1/4" EHS
> > Pulley on tram wire
> > Tram anchor point: at ground level @ 300ft away from target tower.
> > Slope: 0.41
> > Antenna launch point 135 feet away from target tower. (h=0) (165 ft from
> > Tram anchor point)
> > Attach 1/2" rope to TRAM WIRE PULLEY - up to pulley @ 130ft - then down
> to
> > electric rope capstan.
> > Begin tightening tram wire to slope thereby raising antenna located 165
> ft
> > from target tower off the ground.
> >
> > Then begin tramming antenna with electric rope capstan.
> >
> > What weight/mass do I need at the tram anchor point ?
> > Tree ?
> > Vehicle ?
> > Deadman anchor in ground ?
> >
> > Antenna launch point can not be moved. Lot is too narrow and theres
> > another tower nearby.
> >
> > As an alternative, I may a usable tram anchor point 400+ feet away. - I'm
> > going out to look ant how that lines up now ....
> >
> > -Charlie N1RR
> >
> >
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