Re:  my previous post about a dry standpipe
installation, I believe that the large pipe was all
standard-type underground pipe:  ductile iron as I
recall.  The much smaller connection for the drain may
have been handled with some specially lined 2" pipe
for the drain.  There is a company in southern
California somewhere (Santa Fe Springs?) which will
cement-line steel pipe for you on a custom basis. I
have used their services on government-only jobs in
the past where function was more important than
listing.  This job I am referring to was for the
county in which the airport is located.  Since we
needed only about 5' of small pipe, we may have done
something else.  I don't remember.  (Guess I'd make a
good politician....)

Margaret Zabel

--- Roland Huggins <[EMAIL PROTECTED]> wrote:

> the use of underground steel pipe is restricted, see
> 10.1.2.  One can  
> argue about whether it applies just to supply mains
> (since it came  
> out of NFPA 24) since 8.16.4.2.4 addresses it. 
> Transitioning WITHIN  
> a sprinkler system (ie after the system riser), has
> never been well  
> defined.  Skate on out there on that thin (unknown)
> ice.
> 
> Roland
> 
> On Apr 17, 2007, at 2:05 PM, Reed Roisum wrote:
> 
> > I've got a outdoor amphitheatre that needs
> sprinkler protection.  The
> > only option allowed to get from the controls
> (adjacent heated  
> > building)
> > to the arch on the amphitheatre is to go
> underground.  We will be  
> > using
> > galvanized pipe for the dry system for the
> amphitheatre.
> >
> > The question is what pipe should I spec for the
> dry underground?  Can
> > (should) I use galvanized?  Do you sleeve it?  Any
> other suggestions?
> >
> > Thanks,
> >
> >
> > Reed Roisum
> > Fire Protection Technician
> >
> > Ulteig Engineers, Inc.
> > 3350 38th Avenue South
> > Fargo, ND 58104-7079
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