IMM wrote:

You still won't be notching a flitch beam or a RSJ though will you?


You are quoting the exception.

Aha, realisation dawns...

If you think about it there are plenty of other "only exceptions" as
well. Cases where flexible pipe is going to be a better solution:

The pipe run is near a wall, but the wall itself is supported on the
middle of the span of the joists.

The building was constructed with those composite light weight joists
that you are such a fan of, you can't notch them either.

Also situations where there is insufficent joist height evailable.

Or where there are multiple height joists in sequence - alternately
supporting a floor and a non connected ceiling in the room below (as
would be typical in a loft conversion for example).

You would have to assemble
a pipe run from lots of short segments
joined together - very time
consuming with lots of under floor joints.


No one does what you said.

Other than you is seems...


And all other sane mortals too.

Unless faced with one of the many exceptions off course....

So given the task of sticking a 22mm run of pipe across a series of
(un-notchable) joists at 400mm spacing, how are *you* going to install
it without using lots of short sections of pipe?


--
Cheers,

John.

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