• Does NFPA 101 permit the use of quarter landings in escape stairs.

    Does NFPA 101 permit the use of quarter landings (landings in L shaped stairs) in escape stairways?   I'm reviewing an architectural layout which needs to comply with NFPA 101 and the architect has done someth...
    ben_oregan
    last modified by ben_oregan
  • Fire alarm system replacement, conduit size?

    We have a 35 year old fire alarm system in a dept store that needs replaced. The system is currently installed in 1/2" emt conduit. Is it permitted (code wise) to re use the existing 1/2" conduits with new wire, or do...
    dsherer
    last modified by dsherer
  • Changes to NFPA 1582

    Are there any proposed changes to NFPA 1582 that address the findings of recent cancer studies that indicate firefighters are at a higher risk for cancer.  I am specifically interested in changes to the sections ...
    jgrasham747
    last modified by jgrasham747
  • Illuminated EXIT signs and Live Theatre

    Greetings, I was recently at a live theatre production outside my jurisdiction and noticed the EXIT signs went out with the house lights when the show started. Being a prevention officer, I always assess my exit route...
    d_rydall
    last modified by d_rydall
  • Change in occupancy (Mercantile to Assembly)

    I am trying to get to the bottom of an construction issue and was hoping to get some help.  Background This is occurring in a jurisdiction that has adopted NFPA 1 and 101. Significant construction project in whic...
    ffz290
    last modified by ffz290
  • Combine Exit Stair Enclosure and Lift Shaft Pressurization System

    Is it acceptable to combine exit stair enclosure and lift shaft pressurization system in one pressurization system? The pressurization system will consist of one duty fan and one standby fan. There is a li...
    hamad.koroni
    last modified by hamad.koroni
  • NFPA 31 Vent Screen Mesh

    NFPA 31 Section 8.6.4 states vent screen must be #4 (0.187") or coarser. This does not align with UL180:2019 which states the screen must be 2.0 mm (0.787") to 4.0 mm (0.157") - Section 8.4. These need to be aligned. ...
    crbutler
    created by crbutler
  • Cellular Communications and towers

    Single Source Cellular communication may be allowed by the AHJ.   I have been told that in order to meet the intent of NFPA -72 the cell tower must have 24 hour back up as well?  Has anyone head of this...
    wmturner
    last modified by wmturner
  • Nozzle placement and limitations in NFPA 2001 for clean agent fire suppression system

    I need advice on the following two questions:   1. Recently we concluded an installation on the Novec1230 fire suppression system. However, once our installation has finished, the other contractor namely the Ele...
    niranjan.boteju
    last modified by niranjan.boteju
  • When do you have to have voice messaging in audible alarm notifications (Assembly Occupancy)?

    I have been scouring NFPA 101 and NFPA 72 and have not been able to determine when an assembly occupancy must add voice to their fire alarm system. Any help in pointing me towards the right portion of the code I would...
    jzour
    last modified by jzour
  • Dissecting the Details: NFPA 99 2015 and 2018 Editions Categories

    A wonderful discussion with my friend michael.civitello inspired this conversation.   Michael pointed out that moderate sedation is permitted in both NFPA 99 2015 and 2018 Category 2 and 3 medical gas systems.&#...
    quikag82
    last modified by quikag82
  • Evacuation Holding Areas Healthcare

    I was wondering the standard in a health care occupancy in regards to evaucation/holding areas. In a inpatient unit, we have staff and patients in the event of a fire emergency to be directed to an unaffected smoke ba...
    mikeboodry
    last modified by mikeboodry
  • ¿PIRÓMANOS O INCENDIARIOS?

    hmc
    created by hmc
  • elevator maintenance / inspections

    Which standards deal with elevator maintenance/inspections?
    g5alva
    last modified by g5alva
  • Classroom door barricades: Life safety hazard, or necessary precaution?

    Shaken by gun violence, more schools around the country are purchasing after market classroom door barricades that attach to the inside of the door, making it next to impossible to enter from the outside during an act...
    jesseroman
    last modified by jesseroman
  • Polyethylene plants

    Hi there, i am very new to the Xchange forums and this is my first question. does anyone out there have any experience with relevant test methods for artificial polyethylene foliage? i am based in the UK and manufac...
    riclumb
    last modified by riclumb
  • Separation distance for fuel tank

    What is the minimum distance between diesel fuel tank and Diesel generator, also between that tank and transformer? As I have a situation where fuel tank will be between two diesel generators and transformer "6....
    ehab.mechanical
    last modified by ehab.mechanical
  • Wet Pipes in Exposed Area

    can we install fire protection [wet] pipes in exposed area/ or any restrictions [Temperature] 
    sjmaharaja
    last modified by sjmaharaja
  • Foam Suppression Systems for Diesel Generator

    I have been trying to get the experts at NFPA to answer a few simple questions, but keep getting referred back to standards which offer little beneficial information.  Please can someone with any knowledge of die...
    msamadhin
    last modified by msamadhin
  • Outside Stairs as Exit from the Mezzanine

    Our case is an existing business occupancy, enclosed mezzanine (1 story building) with an interior stair and an open outside stair (unenclosed) serving as the 2 means of egress from the mezzanine. NFPA 101 Section 8.6...
    jackl
    last modified by jackl