Denny: That has to be a fairly large diameter spool on that drum you are
using? Not from the subject of room for 600 feet of 1/4 " EHS; but from the
standpoint of 1/4 "EHS not being so flexible on a small diameter. It is
always a fight hand-rolling up; say, 150 feet of this cable. Invariably it
ends up as a 4 foot + diameter 'hoop' of cable; wanting to fight you all the
way. And, if it gets away from you; "Katy bar the door"! It'll slap you five
times before you can control it. (maybe I am exaggerating, Hi!)
Mike, K5UO
.......................................................................................................................................
Date: Mon, 18 Dec 2006 04:27:04 -0800 (PST)
From: Dennis OConnor <ad4hk2004@yahoo.com>
Subject: [TowerTalk] Tram rope
To: towertalk@contesting.com
Let me second Dave's comment... Using rope for a tram line, or small
diameter cable is asking for a crash... I also use only 1/4" EHS... Because
the tram line is pulled into a caternary shape the total forces on it are
far greater than just the weight of the beam...
The other thing I do is that the tram line is run up to the top of the
tower, through a pulley, and back down to a ground anchor on the opposite
side... This way the side thrust is not transferred to the tower... Because
of having to fly the beam over the woods, etc., my tram line is 600 feet
overall and is kept on a drum and used only for that purpose.....
denny / k8do
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|