AndyM wrote:
Hello all,

I need to replace a 22mm pipe under the kitchen floor. The original one, it
appears, was put in when the house was built as there is no way I can get a
length under the joists.

The joists are 4" x 2" resting on brick supports. The routing would take the
pipe parallel to and 12" from the support.

Q. Can I cut a U shaped notch 22mm deep in the top of each 4" joist, 12" from
the support, without seriously weakening the joist?

Thanks

AndyM
It depends on the joist length, all the info is here in simple form (or
look in bldg regs):
http://www.iee.org/Publish/WireRegs/...lding_Regs.pdf
--
Dave S
(The return email address is a dummy)