Greg,
Has he given you any code or standard reference for such a decision on
his part?
Has he developed some information on a problem that results in doing
what you're after?? 7.2.2 (2) ('02 ed) seems to suggest to me that if
you're using dry-pendent sprinklers it's irrelevant what the temperature
of the space below the ceiling is for a dry-pipe system, particularly in
light of the criteria in (3) for using return bends only in areas
maintained above 40 deg.
Right off the top of my head I can't think of any reason you couldn't,
particularly if you're using dry pendents, or even standard pendents on
return bends.
PARSLEY CONSULTING
Ken Wagoner, SET
760.745.6181 voice
760.745.0537 fax
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> e-mail
www.ParsleyConsulting.com <http://www.ParsleyConsulting.com> website
Greg McGahan wrote:
We have an AHJ telling us that we can not use a dry system to feed an
unheated attic and the heated space below the ceiling. He is insisting that
we use a wet system for the lower area with insulation on top of the piping.
We have done this many times in the past but on this project it is very
difficult to accomplish this due to the construction.
I am having a hard time refuting him with concrete proof that there is
nothing wrong with using the dry system with dry pendents.
Thanks for any input from the forum.
Greg
Living Water Fire Protection, LLC
1160 McKenzie Road
Cantonment, FL 32533
850-937-1850
Fax: 850-937-1852
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