I agree with Mark. Some folks (including the TC at the ROP meeting)
seem to think it is acceptable based on 13:A.10.6.5 showing part of
the underground pipe extending above the floor. They seem to have
ignored that the Figure is ductile so doesn't address plastic and seem
to have forgotten that the listing for underground plastic pipe
applies to it being underground. As soon as it is exposed (whether in
a trench or as a transition piece above the floor) it has to be
acceptable as an above ground pipe. Needless to say, this issue will
be addressed again at the ROC meeting.
Roland
On Jul 12, 2011, at 7:16 AM, Mark Sornsin wrote:
Bill - I'm going to go on a limb a bit and suggest there is no
maximum height.
There's underground pipe (CH. 10), above-ground pipe (CH. 6) and the
transition piece (23.1.6.1.1). It is implied that underground pipe
is only underground. An aggressive AHJ or EOR may argue that the
flange must be located at the floor level - so no underground pipe
is above-ground and vice versa. I would suggest that it really only
matters when dealing with plastic underground transitioning to above-
ground pipe. No plastic pipe should be allowed above ground, so the
transition should start below grade. I always spec' ductile iron
into the building. This meets the intent of 23.1.6.1.1 as a
transition. We normally shoot for the transition to the above-
ground pipe to occur at 6 to 12 inches above the floor, but there is
nothing in 13 that mandates any particular height.
Mark A. Sornsin, PE| Fire Protection Engineer
Ulteig Engineers, Inc.| Fargo, ND
[email protected]
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