• FDC Pipe Size

    Hello,    I am looking for an official interpretation regarding NFPA 13's FDC Pipe Sizing Guidelines. gives contradictory and unclear guidance for this matter and I am in need of NFPA's interpretat...
    last modified by aten

    As per NFPA 14 clause "For Class II systems, the minimum flow rate for the hydraulically most remote hose connection shall be 100 gpm (379 L/min)."   My question is whether we have to provide 100...
    last modified by abdulrafay80
  • Automatic detector Requirment

    Hi guys, Consider a shed having only roof is using for dining. All sides are open to enter and exit. Is it mandatory to have both automatic detector and Manual Call point or only manual call point is enough???
    last modified by abircuet2010
  • EC sprinklers and concrete tee

    I would really appreciate someone answering this query.   Example Sprinkler - Tyco DS-2 11.2K dry barrel pendent   Could you please confirm or reject the following for compliance with the NFPA.   Baffle...
    last modified by torben.guldbaek.jensen
  • The design sprinkler for warehouse.

    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. (...
    last modified by thanomsak.c
  • Extending Unrequired Sprinkler System into Addition

    We are adding some work bays onto a repair garage that is classified as Special Purposes Industrial.  The existing garage has a sprinkler system installed during a rehab about 5 years ago, but I cannot find ...
    last modified by catherine.tp.tillberg
  • Regarding Battery Calculation as NFPA 72

    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 onl...
    created by abircuet2010
  • NFPA 11

    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 wit...
    created by chong
  • Fire Pump Pressure Settings

    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 Jo...
    last modified by ferozkhanmech17
  • Can Class 2 standpipes and fire hose be utilized for clean-up and other industrial functions or must they be maintained exclusively for firefighting?

    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 inspec...
    last modified by kkunze333

    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.  Bea...
    last modified by abdulrafay80
  • Fire Pump Sequence Of Operations for Multiple Pumps

    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 die...
    last modified by abdulrafay80
  • Are large fire pumps, 4500 gpm or 5000 gpm split case horizontal, really provided?

    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 experi...
    last modified by minhyeong1.kim
  • figure clarification

    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
    last modified by gkiouzellis
  • Encapsulated commodities

    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...
  • When will someone read the question I asked 2 weeks ago?

    Is there a timeline when someone responds to these questions? 
    last modified by rudygomez
  • Reduced Pressure in Bucket Elevator

    I have been asked for the Pred (reduced pressure) value for a bucket elevator, whether it is single leg or twin leg. How would i go about acquiring this value?
    created by rcooksley
  • Fire Protection Engineer, US Army Corps, Poland

    Hello Folks,   We’re working on a US Army Corps project over in Poland and have been installing fire protection systems through another subcontractor but we’re having some logistical issues with ...
    created by james.karadagli

    We have a water spray system on an oil rig supplied from a fire pump. The fire pump takes water from the sea. We have installed a main pipeline strainer between the pump and the water spray system as th...
  • NFPA 22 Tank Refilling and Duration

    NFPA 22, Edition 2018, Section states that "The water supply shall be capable of filling the minimum required fire protection volume within the tank in a maximum of 8 hours" and at the same time Section 14.4.3...