On 4/6/2011 12:06 AM, Dick Flanagan wrote:
> Weep holes are a great idea, but I suggest you also line the bottom
> of the trench with gravel so the drained water has a place to go.
Remember than in many areas of the country/world that many areas have
the water table with inches of the surface at least part of the year. I
use no weep holes in the current conduit as from the time the snow melts
(Late March or early April) until around June the water table is just
below the surface so my one conduit at 6" deep is completely under
water. This part of the yard along with most of the back yard is of
heavy clay/Lome and would soon fill the conduit with a fine clay if
given drain holes through which to enter. Once dry in the summer that
clay would be like concrete and it would be impossible to pull cables in
or out. OTOH the one running from the tower to the house (75 to 85
feet) runs most of the way through the sand back fill around the
basement. That one is 5" plastic sewer pipe (or was) and had lots of
drain holes. It is now 4" PVC and has a few drain holes at the low
spots in the sand.
Conditions and techniques to work with those conditions vary widely
73
Roger (KI8RI)
> Dick
>
> At 03:30 PM 4/5/2011, Guy Molinari wrote:
> >
> >I assembled the conduit sections by sliding the sections one by one
> >over the batch of cables. This batch consisted of 2 runs of 1/2" hard
> >line plus a rope messenger. I drilled weep holes on the underside of
> >each section of conduit as I went. Then I filled the trench. I've
> >pulled through 2 runs of RG-11 plus a control cable. The run is 80'
> >long to one of my towers.
> >
> >Easy squeezzzy.
> >
> >73,
> >Guy N7ZG
> >
> >
> >> From: k7awbgoog@gmail.com
> >> To: TowerTalk@contesting.com
> >> Date: Tue, 5 Apr 2011 15:14:50 -0700
> >> Subject: [TowerTalk] methods of using conduit in the ground for cables
> >>
> >> As long as we are on the topic, which would be better?
> >>
> >> 1) secure the 4 inch conduit sections together in the trench and then
> fill
> >> in the trench with dirt on top so the sections could not move when
> pulling
> >> cables through them, or
> >>
> >> 2) keep the trench unfilled, but the 4 inch conduit sections put
> together,
> >> and pull the cables through them without the dirt on top?
> >>
> >> As I see it, once you put the dirt on top, there is no going back, but
> the
> >> conduit does not move. On the other hand, conduit without weight
> on it will
> >> tend to move as the cables as pulled through, especially when the "last"
> >> cable is tried.
> >>
> >> Comments from you who have done this.....
> >>
> >> 73
> >> Steve Sala
> >> K7AWB
> >> DN17es
> >> Nine Mile Falls, WA
> >>
> >> _______________________________________________
> >>
> >>
> >>
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> >
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> --
> Dick Flanagan K7VC
> dick@k7vc.com
>
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