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Re: [TowerTalk] Drain Pipe Passing Thru Tower Foundation

To: <n8de@thepoint.net>, "Marsh Stewart" <marsh@ka5m.net>
Subject: Re: [TowerTalk] Drain Pipe Passing Thru Tower Foundation
From: "Patrick Greenlee" <patrick_g@windstream.net>
Date: Wed, 15 Jan 2014 10:31:48 -0600
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
You need more room for movement. It would only take a little initial settling to crack the pvc. Don't rely on just some tape or thin foam.
You don't want to live to regret not giving a little wiggle room.

I am currently getting ready to pull a few 3/4 inch drip tubing runs through some 4 inch pvc used as conduit. This is to carry some cables, coax, etc. Why sleeve the conduit? Because insufficient care was taken in the back fill and it leaks and pools water at the low point. Luckily there is a satisfactory and inexpensive workaround. On the positive side of luck, another pair of runs, each 282 feet are just fine.

Patrick NJ5G

-----Original Message----- From: n8de@thepoint.net
Sent: Wednesday, January 15, 2014 10:04 AM
To: Marsh Stewart
Cc: 'Patrick Greenlee' ; towertalk@contesting.com
Subject: Re: [TowerTalk] Drain Pipe Passing Thru Tower Foundation

I agree with a previous post:  make certain that the 'rain pipe' has a
bit of space to expand/contract.  Layers of tape won't do it!

73
Don
N8DE


Quoting Marsh Stewart <marsh@ka5m.net>:

Thanks for your reply.

The rain pipe is solid white PVC schedule 40, not perforated. It carries
rainwater runoff, not sewerage.

I have decided to wrap the pipe with 2 layers of rubber pipe-insulating tape
and then overwrap that with duct tape, and then pour concrete.

Marsh, KA5M


-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
Patrick Greenlee
Sent: Wednesday, January 15, 2014 6:19 AM
To: Marsh Stewart; towertalk@contesting.com
Subject: Re: [TowerTalk] Drain Pipe Passing Thru Tower Foundation

Everyone has an opinion but you have neglected to provide some important
info. Drain pipe: perforated? solid? sewage, water like from downspouts or

what?  Solid drain pipe with serviceable "fall" that drains to daylight is
not a problem.  Sewer pipe that has worked OK is likely not a problem.
Perforated drain pipe might be a problem but not with sufficient slope and
good drainage down slope from your concrete pour.  The devil is in the
details.  If it were mine and I would want to pour over it as others
describe so long as it is not perforated pipe that could supply water to the

area.

Patrick NJ5G

-----Original Message-----
From: Marsh Stewart
Sent: Tuesday, January 14, 2014 10:52 AM
To: towertalk@contesting.com
Subject: [TowerTalk] Drain Pipe Passing Thru Tower Foundation

I'm installing a base foundation for a US Towers HDX-555. The base will be
5' X 5' X 7.25' per specs. The rebar will be per specs. Concrete will be
4000psi in 28 days. The soil is moist, very firm, and no water is seeping
into the hole. After excavation began, I found a 6" white PVC drain pipe
(rainwater run-off drainage, not sewer) that runs across one corner. The
drain pipe is about 1.5' below grade and runs at about a 30-degree angle
across one corner. Total length of pipe exposed (in the base foundation) is about 4'. The rebar "cage" can be built per specs around the pipe. The pipe
can be relocated, but it will require considerable extra digging and the
soil around the affected corner will no longer be undisturbed.

Should I relocate the drain pipe or pour concrete around it?

Marsh, KA5M

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