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  1. MatthewJWillis

    Calculating ESFR sprinklers in same compartment as QR Sprinklers

    As stated above, You are dealing with TWO different calc areas and TWO different calc methods. Calc the ESFR, per their criteria. Then do a Density/Area calc for the mezz. The Only time you would have combined flow is if rack sprinklers were required as a compliment to the overhead. R/ Matt
  2. MatthewJWillis

    Clevis Hanger

    You will not find it, because it does not exist. Our hangers are based strictly on listing. R/ Matt
  3. MatthewJWillis

    When did this pipe, which I seem to remember was UL Listed, lose the listing?

    Based on the melted joint fusion, and color.., Polybutylene. Was under a big recall/class action lawsuit. Wen out early to mid 90's. R/ Matt
  4. MatthewJWillis

    Tips to determine if a system is Pipe scheduled or Hydrualically Calc'd

    3.5" or 5" pipe were pretty good indicators. Date of system installation is the biggest. Back in the day, hydraulics were cost prohibitive. So no one did them. R/ Matt
  5. MatthewJWillis

    NFPA 13 8.8.5.3.2 - sprinkler under obstructions over 4ft wide

    I believe it was added in the 13 edition.. R/ Matt
  6. MatthewJWillis

    Is it allowed for a pipeline of fire water and electrical conduits to pass through the same opening?

    Nothing really in NFPA. Might be a issue with Fire Stopping depending on assembly. One potential I do see, is that the conduit appears to be touching the sprinkler piping. NFPA 13 requires nothing be supported from the sprinkler piping. It is a foreign item touching the sprinkler piping per...
  7. MatthewJWillis

    NFPA 13r 2013 Edition design areas outside the dwelling units when using quick response sprinklers

    Really enjoying this thread... I agree with Tmack. I tend to go with the more stringent as well. I do feel however, that the Fire Load is a "loaded" description. R/ Matt
  8. MatthewJWillis

    Electric Fire pump ; soft starter

    Be very specific as the range can go from $1000 to $60,000.
  9. MatthewJWillis

    Water curtain - Pipe sizing

    We've drifted pretty far from the question.., Please understand, the way you asked the question, tells me that you need a professional contractor's assistance. That is a question that cannot be answered on a Tips forum IMHO. There are many ways to find one in your area.. R/ Matt
  10. MatthewJWillis

    Water curtain - Pipe sizing

    I agree with NewtonFP. Really big pipe costs a lot of money....
  11. MatthewJWillis

    supporting fire pipes from z purlin.

    I am not sure what a "gripple" wire is, but it does not sound like a listed attachment? Any items touching the structure, or the pipe, in Fire Sprinkler applications must be listed. Normally, if permitted by the Steel Manufacturer, some sort of "Sammy Screw", or other approved means is to be...
  12. MatthewJWillis

    Error in city conducted flow tests. How have you handled it?

    You already know the answer.. Unfortunately, it places us in the bad for having to tell the owner, the city messed up, we need another $250k for a tank.. I feel we do need to hold them accountable. The question truly is how. R/ Matt
  13. MatthewJWillis

    Department store more than 52000 sqft area

    Not quite sure of the extent of the questions you are asking. 80,000/52,000 = 1.53, or 2 System Risers minimum. Pump for each System Riser- I am not sure of what you are asking. Normally there is one pump for building if needed. Ring type main- Presumably looped? Really not enough info here...
  14. MatthewJWillis

    Congratulations - NFSA Top Tech 2019

    Well Done Steve! That's a pretty big deal. Congrats again sir! R/ Matt
  15. MatthewJWillis

    Application Area Definition - Centered btw Sprinklers or not?

    What that guy said. It states a MINIMUM of 1.2 times.. So you cannot just draw 37 feet, or whichever the area works out to. R/ Matt
  16. MatthewJWillis

    Heat Tracing / Insulating Seismic Separation Assembly

    Raytheon is about the only one I know of. It shows standpipes. Not sure why it would not work on Seismic Loop.. R/ Matt
  17. MatthewJWillis

    Area reduction using quick response sprinklers NFPA 13 Section 11.2.3.2.3.1

    Looks like a pretty big volume brother. When in doubt....
  18. MatthewJWillis

    Fire Suppression Requires in Fire Command Center

    AS has been stated, the room will be sprinklered. However, just for conversation, what other Fire Suppression were you thinking?
  19. MatthewJWillis

    CVPC Tenting

    13D shows Batt Insulation and blown insulation. R value I think is determined HVAC engineer? R/ Matt
  20. MatthewJWillis

    Decision to evacuate the workforce in case of fire

    Your post indicates fire tend to develop rapidly... How long does it take to go "verify" it is an actual fire. If the alarm goes off, evac the building. Figure the rest out later. R/ Matt

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