1st floor timbers question

[nelliedee]

Hi
We are currently building a 2 story extension and have hit a problem with the first floor timbers, Our WC pipe runs 7 foot along the wall and joins the main soil pipe. The 7ft of pipe is smack bang in the way of the new Joists. I have been told that we could put trimmers in, but surely 7ft is too much of a span to go around with trimmers????
Any advice would be gratefully received.
Nelliedee

 

[kevindgas]

can you move wc pipe to outside? or move toilet ? i would ask building control for advice before starting any work that involves anything not to the normal standard.

 

[nelliedee]

We cannot move the toilet, the only alternative I can think of is Lowering the WC pipe by 6 inches and it will then protrude into the downstairs kitchen ceiling area. Rather than box it in, maybe we could put a lowered ceiling in later on. It's such a pain.
does anyone know what the maximum span is when using trimmers to go round something, when putting in floor joists.
Nelliedee

 

[noseall]

just curious. how come the toilet waste is at floor level and not above it?

after all, a loo normally exits the pan at 4" or so above finished floor level, that is if it leaves the pan horizontally of course.

 

[nelliedee]

it does exit at about 4" above floor level and then it falls towards the main soil pipe. The fall, makes 3/4 of the pipe, run along where new joists would sit.

 

[noseall]

in 7 feet, a soil pipe only needs to fall 2" or so. can you not re-configure the pipe and fall so that it remains above joist level?

it would need boxing-in of course, within the first floor room.

 

[nelliedee]

Thanks I think that may work as the WC pipe drops quite considerably and there looks to be room to make it higher.
Nelliedee