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  1. mattyd723

    NFPA 13 with Residential Sprinklers

    Thanks for the input, TravisMack. I suppose that is the safe way to go, but is it the required way? The question I'm really looking to address here is: What do they mean by adjacent in 11.3.1.1? Adjacent with respect to the piping or adjacent with respect to compartments, walls & openings?
  2. mattyd723

    NFPA 13 with Residential Sprinklers

    NFPA 13 (2013) Figure 11.3.1.1(a) has always seemed ambiguous to me because it does not consider how the sprinkler heads are fed. What do they mean by adjacent in 11.3.1.1? Adjacent with respect to fire areas or adjacent on a branch line? I wrestle with this one frequently. Please have a...
  3. mattyd723

    Advice on locations of drum drip for a dry-loop system

    Here's a pictorial answer, in case my language wasn't clear: Link
  4. mattyd723

    Advice on locations of drum drip for a dry-loop system

    I just designed a very similar-looking dry loop system. There's really not enough info given but if my back was against the wall, I would recommend installing 2 drum drips: one on each of the mains that run east-west, at the half-way point between the mains that run north-south. Are they...
  5. mattyd723

    NFPA 13D & Nonresidential Sprinkler Heads

    That's a great point, majesticphil and that's how I try to design basements 99% of the time on 13D projects. However there are those unique situations where someone wants permanent exposed steel pipe and it would be nice to have an upright sprinkler that we could legally use in this scenario...
  6. mattyd723

    NFPA 13D & Nonresidential Sprinkler Heads

    I tend to think that if I were the only company with a listing on a residential upright, I could make a few dollars off it. You're probably right right though. Money is the reason. Shocking.
  7. mattyd723

    NFPA 13D & Nonresidential Sprinkler Heads

    That doesn't answer my question, it raises more. Those excerpts from the 2013 NFPA 13D are exactly what I was alluding to in my first post. This is still a grey area. "Unheated areas not intended for living purposes", like a garage. Sprinklers aren't required in 13D garages. So whats the...
  8. mattyd723

    NFPA 13D & Nonresidential Sprinkler Heads

    Yes, I see what they are saying in this document. It still evades my issue. While it is true that there are no residential sprinklers listed without specific discharge criteria, quick response spray sprinklers are all listed without specific discharge criteria. I can't find where it says all...
  9. mattyd723

    NFPA 13D & Nonresidential Sprinkler Heads

    8.1.1.1 from the 2010 edition has mysteriously vanished from the 2013 edition's new Chapter 10, causing me to wonder about sprinklers that are not listed with specific discharge criteria. I could ask the AHJ about it, or I could ignore the 2013 edition until they start enforcing it and worry...
  10. mattyd723

    NFPA 13D & Nonresidential Sprinkler Heads

    In some situations it is better to run exposed steel pipe with upright sprinklers than with pendent sprinklers because the uprights are less susceptible to damage. This has always challenged me because in 15 years of designing sprinkler systems, I have not yet seen or heard of a residential...

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