• Double interlock preaction system - full building coverage

    Are there any occupancy restrictions where a double interlock preaction system may be used?  For example, could an entire hospital (Institutional) provide sprinkler coverage with a preaction system?  It appe...
    rerickson
    last modified by rerickson
  • Dry System Delivery Times

    We have designed three dry systems for an nursing home in Tenn..  The building is divided into (3) riser systems. Each Riser covers Attic Area and Living Area in it section. Upon plan review, the S...
    gforleeg
    last modified by gforleeg
  • AWWA vs ISO/EN Ductile iron pipes

    Good Evening all, What is the difference between AWWA compliant ductile iron pipes and ISO/EN compliant ductile iron pipes? What may go wrong if I replaced them?   Regards,
    waelio
    last modified by waelio
  • Air Compressors

    I'm looking for some information regarding UL listings and air compressors for dry sprinkler systems.  Is there a requirement for the air compressor to be UL listed for this use? I know the air maintenance devic...
    dmastro
    last modified by dmastro
  • 13 D System

    Has anyone been asked/required to provide a sprinkler system for a prefabricated mobile unit approximately 499 S/F. It would  be classified in the Residential  Group R-1 and the units will be used for transi...
    larryhoodmail
    last modified by larryhoodmail
  • Method of Battery Calculation for Fire Alarm System as per NFPA 72

    Hello all, I am looking for a clear method to complete battery calculation for a Fire Alarm System. As per NFPA 72 [2013], "The secondary power supply shall have sufficient capacity to operate the system under qu...
    md.sadidrahman
    last modified by md.sadidrahman
  • Fire risk advisor for Oregon forest land

    This is a homeowner question: My adult son wants to buy 50+ acres in Oregon forest land. He wants to live there. Can he hire an advisor (e.g., a certified fire mitigation specialist) to advise him before he buys a sit...
    d2alvarado
    last modified by d2alvarado
  • High Pressure Standpipe Main

    My scenario is below: 50 story condo-all concrete and steel 2 fire pumps in parallel on ground level 2 stairwells-both have floor control assemblies, 1 stairwell is for redundancy with all the valves and such. the...
    jpotvin
    last modified by jpotvin
  • Elevator Heat Detector placement

    We recently upgraded an elevator in our detention center.  The elevator inspector has cited us for having the heat detectors too far away from the fire sprinklers in the shaft and the mechanical room.  ...
    cshelton
    last modified by cshelton
  • LPG- Fire

    LPG Fire can be emulsified with water? how you can justify using a firewater system for LPG handling industries.
    nav822nav
    last modified by nav822nav
  • Flushing Flow Rate

    What are the NFPA flushing rates for external (unburied or underground) pipes? I believe that they should be the same flushing flows proposed for underground pipes as contemplated in NFPA 24   Than you,#Flushin...
    dabenitez
    last modified by dabenitez
  • HOSE ALLOWANCE PRESSURE IN HYDRAULIC CALCULATIONS

    In hydraulic calculations (using software) we normally find the fire pump pressure requirement using farthest sprinkler as the reference point and than add hose stream allowance as per hazard requirement. I need some ...
    abdulrafay80
    last modified by abdulrafay80
  • C1D1 Taping Threads

    In a C1D1 environment do you have to tape threads?  Or no?  A company I called, Appleton, said no.  They said to use Kwiko A or Chico A, sealing compound, but the threads can still cause a leak right?
    1502smith
    created by 1502smith
  • Does zone control assembly is mandatory?

    In a project detection system is installed along with sprinkler system. So at that can is zone control is mandatory? Can anyone suggest as per codes?  Advance thanks.
    istiaque.emcs
    last modified by istiaque.emcs
  • Installation Requirements for CMDA Sprinklers

    where can i found Installation Requirements for CMDA Sprinklers ?
    ahmedelshahaba
    last modified by ahmedelshahaba
  • Can smoke detectors be installed as supervisory in a hotel room?

    Hello,   We have a hotel and we continue to receive several nuisance alarms in some of the rooms. The rooms have smoke detectors and are currently installed to alarm. I know duct detectors can be set to supervis...
    stephenpaulotero
    last modified by stephenpaulotero
  • 13 or 13R

    Constantly get multi family / Hotels etc and architects calling for NFPA 13 instead of 13R often finding out that it only needed 13R and it seems the architects are applying 13 as a ways to cover their selves. I reali...
    jcouch@vfptx.com
    last modified by jcouch@vfptx.com
  • Hydraulic Calculation for Private Network, Tank Size

    Hi,   I have a private fire network with fire tank, which has set of buildings not exceeding 2 floors (21 meters), we have combined fire network with manual hose cabinets and automatic sprinkler system in buildi...
  • Tank Capacity - Sprinkler + Standpipe Hoses

    Good afternoon,   If I have a building with sprinkler system for the storages areas and a standpipe with hoses sistem for the rest. and the building have a external conexion for firefighters, do i need to consi...
    marcosmirrac
    last modified by marcosmirrac
  • Releasing panel signal reporting (Alarm, trouble, supervisory)

    A releasing panel (pre-action, clean agent, etc) is located in a building with a required fire alarm system.    Does NFPA 72 permit this releasing panel to only be monitored by the main fire alarm control pa...
    brian.lukus
    last modified by brian.lukus