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  1. 964

    Grooved vs Threaded Fittings

    All, My experience in fire protection has been limited to the contractor side, and I was always taught to use grooved fittings whenever possible. The benefits as explained to me always made sense, prefabrication, less labor for installation, lower overall cost, etc. I continually see project...
  2. 964

    Fire Pump Sizing from Fireflow

    I agree with fel3 that 20psi is probably a minimum requirement. Pump manufacturers typically specify NPSHr (Net Positive Suction Head required) to ensure that you don't damage the pump due to an insufficient supply. Don't have any experience with fire flow or mobile fire pump standards, but I...
  3. 964

    Two Parallel Pressure Reducing Valves in System Supply per FM Global.

    Hello, Per the title I am working on a job that has two parallel pressure reducing valves in the system supply which is a first for me, and I specifically have some questions on the FM Global pressure relief valve requirements. Some job info: -Building is on a college campus supplied by a...
  4. 964

    FM Global Test Certs

    Stookey Thanks for the suggestion, I will give that a try next week.
  5. 964

    FM Global Test Certs

    Hi All, I am wrapping up my first job that had to comply with both NFPA 13 and FM Global, and I need to fill out FM Global test certs for the field inspection. I have found FM85A and FM999C in Appendix C of FM DS 2-0, but they appear to be shrunken image captures of excel tables or something...
  6. 964

    Using Domestic Water Booster Pumps in Sprinkler Calculations

    Spoke with the EoR and now I have a good understanding of the design philosophy. What the two AHJs and insurance company agreed on is that everything from the discharge manifold upstream could be thought of as an offsite municipal pumping station where the FP and domestic water would...
  7. 964

    Using Domestic Water Booster Pumps in Sprinkler Calculations

    I don't know if this is something the forum can help with, or if I need the EoR to weigh in. Between writing my third RFI and playing phone tag with the EoR and GC I am now behind schedule on my permit drawings, and if I cant figure something out soon it could impact the project schedule. So I...
  8. 964

    NFPA 13 Temperature Ratings

    I am starting to provide intermediate temperature heads throughout even if the customer doesn't ask for it. That way I don't have to worry when supply diffusers start moving around. Most of my work is in CT and the CT State Building Code recently went from 2005 to 2016, so until last year I was...
  9. 964

    NFPA 13 Temperature Ratings

    sk That is the way I was leaning, I guess it just irked me that items which appear in both tables have different requirements based on the setting. In my mind if a 1' radius from a diffuser defines the need for intermediate temperature in an office, why would the requirements change in a condo...
  10. 964

    NFPA 13 Temperature Ratings

    Hi For the purpose of this post I am using NFPA 13 2010 Edition as it was the one on my desk and within reach. I was wondering if anyone could clarify for me when Table 8.3.2.5(c) "Ratings of Sprinklers in Specified Residential Areas" applys. My confusion stems from the fact that some items...

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