I'm a little confused on how it is more stringent
IBC 2009 905.4.5
"Where the roof has a slope less than four unit is vertical in 12
units horizontal (33.3 percent slope), each standpipe shall be provided with
a hose connection located either on the roof or at the highest landing of a
stairway with stair access to the roof. An additional hose connection shall
be provided at the top of the most hydraulically remote standpipe for
testing purposes"
NFPA 14 2010
"7.3.2 Class I systems shall be provided with 2½" hose connections
in the following locations.....
(5) At the highest landing of stairways with stairway access to a
roof, or on roofs with a slope of less than 4/12 where stairways do not
access the
roof. "
"7.10.1.1.1 For class I & III systems, the minimum flow rate for the
hydraulically most remote standpipe shall be 500 gpm......"
"7.10.3.1 The maximum flow required from a 2½" hose connection shall
be 250 gpm"
IBC is just mirroring 7.3.2 as well as telling you to put a second fhv on
the hydraulically remote standpipe which goes along with NFPA 14. If
anything its less stringent because with IBC if you have a roof with a slope
over 4/12 with roof access you do not need to put the fire hose valve at the
top landing, NFPA 14 tells you to put the valve at the top landing
regardless of roof slope (as long as there is access to the roof).
If you have a roof that is under 4/12, you need to either put a fhv on the
highest landing if it has roof access, if it doesnt then put the fire hose
valve on the roof.
-----Original Message-----
From: Sprinklerforum [mailto:[email protected]]
On Behalf Of Steve Leyton
Sent: Wednesday, March 25, 2015 3:47 PM
To: [email protected]
Subject: RE: Roof Hydrant Valves - Multi-Story Building
Thanks for posting Peter.
Norman has correctly pointed out that the building code contains language
that can be interpreted as more strict than the NFPA standard. It says
"... a connection at the roof or at ...", which I've seen interpreted as
meaning "... at the top of each standpipe." But what it literally says is
"... a connection ..." as in one single connection. The TC's intent was
that there be fire hose connections at locations where fire-fighter access
to the roof is likely during a fire, so the language is in harmony with the
building code otherwise, i.e. at the top landing of stairs accessing the
roof and at the roof level where access is provided by way of stairs and a
hatch, presuming that the roof isn't sloped, which makes fire fighting ops
(and testing of standpipes) not-so-viable.
Reference also §A7.3.2, which helps to articulate the technical committee's
intent: "Only one standpipe is necessary to serve the roof regardless of the
travel distances in 7.3.2.2; it is not the intent to extend each standpipe
to the roof level."
Even though I run smack like a committee member, the foregoing is my opinion
only and does not necessarily represent the opinion or intent of the NFPA 14
Technical Committee on Standpipe and Hose Systems.
Steve Leyton
Protection Design & Consulting
San Diego, CA
-----Original Message-----
From: Sprinklerforum [mailto:[email protected]]
On Behalf Of Jeremy Frazier
Sent: Wednesday, March 25, 2015 11:31 AM
To: [email protected]
Subject: RE: Roof Hydrant Valves - Multi-Story Building
Is this in the 2013 Ed? I'm not seeing it in 2010. So it looks like no
matter which way you interpret it you do not need a roof hydrant valve, you
would only need a FHV at the highest landing near the roof access.
-----Original Message-----
From: Sprinklerforum [mailto:[email protected]]
On Behalf Of Pete Schwab
Sent: Wednesday, March 25, 2015 12:45 PM
To: [email protected]
Subject: RE: Roof Hydrant Valves - Multi-Story Building
Jeremy
The 200 ft travel distance does not apply to the roof if it is not intended
for occupancy Pete
7.3.2.2* Where the most remote portion of a nonsprinklered floor or story is
located in excess of 150 ft (45.7 m) of travel distance from a hose
connection in or adjacent to a required exit or the most remote portion of a
sprinklered floor or story is located in excess of 200 ft (61 m) of travel
distance from a hose connection in or adjacent to a required exit,
additional hose connections shall be provided, in approved locations, where
required by the local fire department or the AHJ.
7.3.2.2.1 The distance requirements in 7.3.2.2 shall not apply to the roof
if it is not intended for occupancy.
Peter Schwab
VP of Purchasing and Engineering technologies
Wayne Automatic Fire Sprinklers Inc.
222 Capitol Court
Ocoee, Fl 34761
Mobile: (407) 468-8248
Direct: (407) 877-5570
Fax: (407) 656-8026
www.waynefire.com
Please check out our website for the details!
-----Original Message-----
From: Sprinklerforum [mailto:[email protected]]
On Behalf Of Jeremy Frazier
Sent: Wednesday, March 25, 2015 11:36 AM
To: [email protected]
Subject: RE: Roof Hydrant Valves - Multi-Story Building
You shouldn't need a roof hydrant if you are under 200' from your last fire
hose valve to the furthest point on the roof, but you do need to put the
fire hose valve at the highest landing to the roof hatch.
NFPA 14 2010
7.3.2 Class I systems shall be provided with 2½" hose connections in the
following locations.....
(5) At the highest landing of stairways with stairway access to a roof, or
on roofs with a slope of less than 4/12 where stairways do not access the
roof.
-----Original Message-----
From: Sprinklerforum [mailto:[email protected]]
On Behalf Of [email protected]
Sent: Tuesday, March 24, 2015 12:06 PM
To: [email protected]
Subject: Roof Hydrant Valves - Multi-Story Building
We are having some differences of opinion with a local fire marshall
requesting the installation of roof hydrant valve. We are protecting a
4-story building that will be fully sprinklered utilizing a Class 1 -
combination standpipe in the north stairwell and south stairwells. Two
standpipe stacks were provided to get the 200' travel distance across the
building. Hose valves are located on intermediate landings.
Near the center of the building on the top floor there is a permanent ladder
leading to a roof hatch. The owner does not intend to utilize the roof for
any type of occupancy, only service for MEP. Since the owner does not intend
to use the roof for occupancy, our travel distance from our standpipe
through the roof hatch is approx. 180'-0", and our roof slope is less than
4/12 we were not planning on installing any additional hose valves / roof
hydrant valves in the small room where the roof hatch is located.
Were we right by leaving out the hose valve in this roof on the original
design?
Thank you
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