11/22/02 Stewart to Brodehl/Fire FlowJim Stewart
Assistant Chief / Fire Marshal
Kalispell Fire Department
312 1 st Avenue East
Kalispell, MT 59901
Phone (406) 758-7763
Fax (406) 758-7952
j stewart@kalispell. com
From: Jim Stewart Ustewart@kalispell.com]
Sent: Friday, November 22, 2002. 5: -PM g
To: Randy Brodehi
Subject: Mountain View plaza flow
Randy,
I researched our records for information related to our fire flow
requirement at Home Depot but didn't find any information that we put out
during plan review.
Regarding required fire flows from Appdx III -A of the UFC, this building is
a 115,000 sq ft, Type V-N. Fire flow for this is 8,000 rpm. As you know,
if an AFES is providing, we can give up to a 75% reduction in flow.
(Historically I have been comfortable with a 5010 reduction.)
The building is fully sprinklered which would reduce the flow requirement to
2000 - 4000 gpm depending on how much reduction we allowed.
I did find documentation from the fire protection consultant that indicated
TD&H conducting modeling which indicated a flow of 3136 gpm available at 20
psi. With this info, the consultant indicated a fire pump was not required.
(this was based on a static pressure of 86.8 psi). I also found a letter
from Stan Beard that stated "we expect the line and hydrants will meet the
city and fire department standards for supply and flow".
We conducted a fire flow test on July 24th. Results were: Static 92,
Residual 70, flow 2041, which calcs out to 3870 available at 20 psi. That
flow puts us close to the 50% reduction figure. It should be noted that
these pressures will be impacted by future construction and system demand,
will lower the flow available 20 psi. It is possible that this was
projected by the FP consultant, or TD&H, seeing how they used a static
pressure of 86.8.
Hope this information is useful. Sony if I went into too much
detail....... but as a bona fide codehead..... I can't help it!
igs
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