Walls over drains
 

Hi
I know how to bridge a foundation/brick wall over a sewer pipe if they are at right angles to each other,but would like to know how close can foundation/wall be put to a underground pipe when it run parallel to it ?

"Pete" wrote in message
...

Hi
I know how to bridge a foundation/brick wall over a sewer pipe if they
are at right angles to each other,but would like to know how close can
foundation/wall be put to a underground pipe when it run parallel to it
?

The bottom of the foundation must be at least 150mm below the bottom of the
drain so it will be bearing on solid soil and won't put any load on the drain.
That way you can go as close as you like, although put some formwork in between
to stop the concrete surrounding the drain. And take care not to move or damage
the drain, especially if it's an old stoneware one.

On Sun, 20 Mar 2005 16:59:41 +0000, Pete
wrote:


Hi
I know how to bridge a foundation/brick wall over a sewer pipe if they
are at right angles to each other,but would like to know how close can
foundation/wall be put to a underground pipe when it run parallel to it
?

Assuming its house walls, there are some rules depending upon pipe
depth, but from memory 1m, but please check, as it depends upon the
relative depths of the pipe compared to the foundation.

Rick

Rick wrote:

On Sun, 20 Mar 2005 16:59:41 +0000, Pete
wrote:


Hi
I know how to bridge a foundation/brick wall over a sewer pipe if they
are at right angles to each other,but would like to know how close can
foundation/wall be put to a underground pipe when it run parallel to it
?


Assuming its house walls, there are some rules depending upon pipe
depth, but from memory 1m, but please check, as it depends upon the
relative depths of the pipe compared to the foundation.

Rick

Huh? Mostr of mine run almost alongisde...

On Mon, 21 Mar 2005 22:49:00 +0000, The Natural Philosopher
wrote:

Rick wrote:

On Sun, 20 Mar 2005 16:59:41 +0000, Pete
wrote:


Hi
I know how to bridge a foundation/brick wall over a sewer pipe if they
are at right angles to each other,but would like to know how close can
foundation/wall be put to a underground pipe when it run parallel to it
?


Assuming its house walls, there are some rules depending upon pipe
depth, but from memory 1m, but please check, as it depends upon the
relative depths of the pipe compared to the foundation.

Rick

Huh? Mostr of mine run almost alongisde...

At ground level I guess thay can, I guess its about not undermining
the foundation when you dig the trench.

Rick

"Rick" wrote

I guess its about not undermining
the foundation when you dig the trench.

True, but the question was how close can a foundation/wall go to an existing
drain - not the other way around.

Rick wrote:

On Mon, 21 Mar 2005 22:49:00 +0000, The Natural Philosopher
wrote:


Rick wrote:


On Sun, 20 Mar 2005 16:59:41 +0000, Pete
wrote:



Hi
I know how to bridge a foundation/brick wall over a sewer pipe if they
are at right angles to each other,but would like to know how close can
foundation/wall be put to a underground pipe when it run parallel to it
?


Assuming its house walls, there are some rules depending upon pipe
depth, but from memory 1m, but please check, as it depends upon the
relative depths of the pipe compared to the foundation.

Rick


Huh? Mostr of mine run almost alongisde...


At ground level I guess thay can, I guess its about not undermining
the foundation when you dig the trench.


Well we dug the foundations a LOT deeper than the drains.

But that of course was a new build with modern foundation depths. At
least 1.2m and up to 2.8m in places where trees are.


Rick

Peter Taylor wrote:
"Pete" wrote in message
...

The bottom of the foundation must be at least 150mm below the bottom
of the
drain so it will be bearing on solid soil and won't put any load on
the drain.
That way you can go as close as you like, although put some formwork
in between
to stop the concrete surrounding the drain. And take care not to
move or damage
the drain, especially if it's an old stoneware one.

There are detailed Building Regs at:

http://tinyurl.com/6krzx

Look at section H 2.25 onwards

Hope this helps

Charlie

"Charlie" wrote in message
oups.com...

Peter Taylor wrote:
"Pete" wrote in message
...

The bottom of the foundation must be at least 150mm below the bottom
of the
drain so it will be bearing on solid soil and won't put any load on
the drain.
That way you can go as close as you like, although put some formwork
in between
to stop the concrete surrounding the drain. And take care not to
move or damage
the drain, especially if it's an old stoneware one.

There are detailed Building Regs at:

http://tinyurl.com/6krzx

Look at section H 2.25 onwards

Hope this helps

Charlie


Charlie, this reference to the Building Regs relates to laying drains near
existing buildings, so as not to weaken the foundations. The OP wants to know
how close he can dig a foundation to an existing drain - it's not the same
question. New foundations are covered under Part A.

Peter