[TowerTalk] Drain Pipe Passing Thru Tower Foundation

[David Gilbert]

Wrong.  No way water that isn't under pressure (it's a passive drain 
pipe) is going to make the soil around his foundation any wetter than it 
would normally get being only 1.5 feet below the surface.

KA5M should do what G4ZTR says ... wrap the drain pipe with something 
forgiving (the thin foil-backed foam you can get at Lowes or Home Depot 
for insulating duct work is cheap and would work fine) and just pour the 
concrete around it.  That would be MUCH better than tearing up the soil 
around the foundation.

Dave   AB7E


On 1/14/2014 11:48 AM, Brian Amos wrote:
> Move the pipe. If it were to ever leak you would have a leaning tower.
>
> Brian
> KF7OVD
> On Jan 14, 2014 11:42 AM, "John Lemay" <john at carltonhouse.eclipse.co.uk>
> wrote:
>
>> Marsh
>>
>> The answer to your question is neither !
>>
>> No need to relocate the drain, but don't pour concrete directly around it
>> either. What you should do is surround the exposed pipe with a firm but
>> compressible material, and then pour the concrete. The material could be a
>> dense foam for instance. Alternatively get a piece of larger plastic pipe,
>> split it lengthways and place it around your drain with some spacers.
>>
>> The intention is to isolate the drain from small movements in your concrete
>> base. Also, if you need to replace the drain at a later date, it will be
>> much easier.
>>
>> This is what I would do in a domestic situation. I'm assuming your building
>> codes in the US don't have a specific requirement.
>>
>> John G4ZTR
>>
>>
>> -----Original Message-----
>> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
>> Marsh
>> Stewart
>> Sent: 14 January 2014 16:52
>> To: towertalk at 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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