It's amusing that an exception provides more clear guidance than the
IBC of every day systems. The LSC is nice and explicit but it is not
adopted in about 20% of the states. Anything just in the IBC or 13
for all systems in a hi-rise?
Roland
On Jan 14, 2011, at 7:59 AM, Jim Davidson wrote:
Roland,
NFPA 101 paragraph 11.8.3.1 states "High-rise buildings shall be
protected throughout by an approved, supervised automatic sprinkler
system in accordance with NFPA 101, Section 9.7. A sprinkler control
valve and a waterflow device shall be provided for each floor.
As per the 2006 IBC paragraph 403.3 "Reduction in fire resistance
rating" states "The fire-resistance-rating reductions listed in
Sections 403.3.1 and 403.3.2 shall be allowed in buildings that have
sprinkler control valves equipped with supervisory initiating
devices and water-flow initiating devices for each floor". Most
architects and building owners use this section of the IBC to reduce
the thickness of fire proofing material applied to the structural
steel members of the thickness of concrete between the exterior of a
concrete structural member and the steel bar reinforcement.
We all need to pay attention to what are the legal codes being
enforced in a jurisdiction, especially when the Fire Marshall is
enforcing the NFPA codes and the building department is using the IBC.
Have a fire safe day.
Regards
Jim
Jim Davidson
Davidson Associates
Fire Protection * Medical Gas * Code Consulting
302-994-9500 Fax:302-234-1781
-----Original Message-----
From: [email protected] [mailto:[email protected]
] On Behalf Of Roland Huggins
Sent: Thursday, January 13, 2011 3:46 PM
To: [email protected]
Subject: Re: Hydraulic Calcs
I concur with everything you said and the alarm requirements are very
explicit regarding on supervision IF a component is present. Where
does the IBC say you have to have a water flow switch on EVERY floor
of a hi-rise?
Roland
On Jan 13, 2011, at 12:28 PM, Jim Davidson wrote:
In the IBC (2006 Edition) paragraph 903.4 "Sprinkler system
monitoring and alarms", states;
All valves controlling the water supply for automatic sprinkler
systems, pumps, tanks, water levels and temperatures, critical air
pressures and water-flow switches on all sprinkler systems shall be
electrically supervised. And paragraph 903.4.1 Signals, requires
that;
Alarm, supervisory and trouble signals shall be distinctly different
and automatically transmitted to an approved central station, remote
supervising station or proprietary supervising station as defined in
NFPA 72 or, when approved by the fire code official, shall sound an
audible signal at a constantly attended location.
Paragraph 903.4.3 "Floor control valves" states that;
Approved supervised indicating control valves shall be provided at
the point of connection to the riser on each floor in high-rise
buildings.
The IBC does require the supervision of fire sprinkler systems
especially where IBC sprinkler trade off are used in the design of
the building.
Have a fire safe day.
Jim Davidson
Davidson Associates
Fire Protection * Medical Gas * Code Consulting
302-994-9500 Fax:302-234-1781
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