So where is the cut-off between repair and new installation? If you
replace all of the existing pipe, fittings, sprinklers and hangers,
etc. with exact new duplicates in an existing 30,000 building, is
that a repair? If you replace some black steel pipe with galvanized,
does that now become a new installation?
At 11:32 AM 1/12/2011, you wrote:
NFPA 25 does not require verification for repair work (provided you
are replacing like with like). Verification of adequacy per
specification is a different story that may have nothing to do with
what is required by the standards. Some reasons can be less than
honorable.
Roland
On Jan 12, 2011, at 8:14 AM, Doug Hicks wrote:
The dry pipe protects the overhang of a walkway, no attic. the
original install is about 20 years old. About 6 years ago, 2 more
low hazard buildings were built and the dry pipe system was
extended. The 2 new buildings are each protected by a separate wet
system. All the fire water comes from the original street
connection. The extension increased the protected area about 35-40
%. I assume hydraulic Calcs were done by a licensed person. I tried
to type that with a straight face. No increase in pipe sizes were
done. I do not know what edition of 13 was used for any of the
sprinkler work. I doubt that any water supply information is on
file anyplace. So if Calcs are needed, I will have to have a
qualified person do that for me. My local AHJ allows do whatever I
want. So the decision will be up to the client and his engineer.
I will print this out, we have a meeting at 9:00 AM. After the
meeting I am sure I will have more questions.
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, CT
860.535.2080
www.fpdc.com
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