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abircuet2010
Hi guys, I am confused regarding the battery calculation of fire alarm & detection system. Few UL listed panel manufacturers provide a sample calculation in which in alarm condition they recommend to consider only 5% or 20% of the detector to count. Because only the detectors have detected the smoke will lead the LED at ON state which will… (Show more)
in Fire Protection Systems
chong
According to NFPA 11 testing of Balanced Pressure Proportional System (BPPS) is possible with water instead of actual foam concentrate.   What are the requirements and criteria for the testing of BPPS System with Foam Pump and Water?   Is there and conditions that we should take into account that :- 1) Testing with water only possible for… (Show more)
in Fire Protection Systems
ferozkhanmech17
Dears, Kindly Help me to get Proper settings Based on my Below values I want to Know the Jockey Pump start and Stop Setting, Electric Pump start, diesel Pump start.   1500GPM Electric and Desiel Pump 50 GPM Jockey Pump Churn Pressure for diesel Pump 250psi with Suction 90psi City suction 66psi Minimum max 90psi what are the settings Start… (Show more)
in Fire Protection Systems
kkunze333
I am working in a setting where industry wants to utilize clean-up hose for firefighting.  If it meets the size and flow requirements of a Class 2 standpipe and hose system, I advise that fire hose must be inspected, tested, and maintained but I have not found any restrictions from utilizing the hose for other purposes.  
in Fire Protection Systems
abdulrafay80
I am designing sprinkler system. In the ceiling there are lots of beams creating obstruction for normal upright sprinkler. Beam depths are large enough that we cannot install the sprinklers below the beams.  Beams are arranged in a way that they are creating rectangular pockets like rooms with 7.4 m x 4.03 m dimensions. Only difference is in room… (Show more)
in Fire Protection Systems
thanomsak.c
This is information for warehouse and goods storage as follow. -  The warehouse have sizing as 20 m x 160 m.   -  Ceiling storage high as 18 m. -  Storage high as not most than 6.5 m. ( Palletized and Solid-Piled Storage ) -  The goods is class group plastic A. -  Ceiling storage slope as 3 degree.   How should I design the sprinkler… (Show more)
in Fire Protection Systems
abdulrafay80
In one of my project we have a requirement of 2500 gpm fire water flow. Instead of providing one 2500 gpm electrical pump and one 2500 gpm diesel pump we have provided 2 x 1250 gpm electrical pump and 2 x 1250 gpm diesel pumps. Now the problem is what will be the sequence of operation pumps. For example, normally if electrical pump does not… (Show more)
in Fire Protection Systems
gkiouzellis
the section states sprinkler shall be positioned minimum 3x max column dimension and at the same time max of 24". if the column dimension is 2-ft, A dimension is over 24". can anyone please clarify this statement
in Fire Protection Systems
nfpa.notifications@msratingbureau.com
Standard 13 2019 edition paragraph 3.3.64 gives the definition for encapsulation for combustible commodities. The question is does this definition apply to all commodity classes or is there another definition? Section 21.2.3 gives design for commodity classes 1-4. 
in Fire Protection Systems
minhyeong1.kim
Hi. I wonder large fire pumps, 4500 gpm or 5000 gpm split case horizontal, are commonly provided in real world projects. I am not sure there are demands for such high capacity pumps in the industry. In my experience, never used single large pump, instead used multiple small or medium size pumps, e.g. 2 x 2500 gpm.   I am working on a project… (Show more)
in Fire Protection Systems
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