You know you can NOT look at just ONE section of the standard. Since
it is a high-rise, 14:5.4.1.1 is the criteria that drives this boat.
The issue on 5.4.1.3 attempts (and badly I might add) to address
using a combined standpipe. The way it is written here IMPLIES that
you can have a combined sprinkler/standpipe with an automatic
sprinkler supply but a manual standpipe supply ONLY in a retro-fit.
It applies to new buildings too as clearly indicated in the latest
edition.
Roland
On Jan 31, 2007, at 6:43 AM, art wrote:
We have a 100 ft high rise residential bldg. with major
renovations. There
are two existing 4" standpipes. The building will be retrofitted
with a
sprinkler system per NFPA 13. From NFPA 14 2003,can 5.4.1.3 be used
to not
require a fire pump to supply the standpipe 100 psi pressure since
this
existing 80 year old bldg is being sprinklered? Is the fire pump
required to
supply 750 gpm with 500 gpm at 100psi at the most remote standpipe?
Art Tiroly
ATCO Fire Protection
Roland Huggins wrote
excellent question. I put my money on Steve's answer. The NFPA
committees that I am on (or familiar with) are aggressively moving
away from encouraging occupants to use a hose (which correlates
nicely with OSHA requirements).
Roland
On Jan 30, 2007, at 1:02 PM, Steve Leyton wrote:
I think that the sections I referenced are quite clear:
"For Class III systems installed without hose, the water supply
requirements shall be as specified for Class I systems."
That would be ALL of the water supply design criteria, including
both maximum and minimum pressures.
Steve Leyton
Protection Design & Consulting
The foregoing is the opinion of the writer alone, and does not
necessarily represent the intent of the NFPA 14 Technical
Committee, nor constitute a formal or informal interpretation of
the standard.
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