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  1. Danefre

    I have an older warehouse being converted to an public assembly arena. Does anything need to be done with the sprinkler system?

    It's probably fine. The only way to really know is to survey and calc. How big of an arena? Over 1,000 occupants?
  2. Danefre

    Help with Fire Sprinkler Design Area

    I would say that's pretty close to correct. A reviewer might ask you to include the head in the Service Counter (right next to the room label) Maybe do 1 more calculation that includes the southmost branchline. It's pretty obvious that it's not going to be most demanding (only 3 heads on it)...
  3. Danefre

    Help with Fire Sprinkler Design Area

    EDIT: The areas are not correct. Multiple reasons why but basically start with the basic steps as outlined in NFPA 13 and below. The drawing on the right is a bit more correct, but i would include the 2nd and 3rd southmost branchlines, starting from the most remote head (plan right). You're...
  4. Danefre

    Calculating K Factor (odd oriface size)

    My understanding is that a K-factor is just the nominal factor that relates flow and pressure, based on the famous formula. It's derived as shown: (from the Viking Technical Article) Q = av Q= flow in cubic feet per second a= the cross sectional area in square feet v= velocity in feet per...
  5. Danefre

    Domestic meter sizing for combined domestic/fire sprinkler system

    Agreed with Travis. TYCO makes an automatic Residential shut-off valve if it helps your case. RSV-1.
  6. Danefre

    Celling obstructions to sprinklers discharge

    Are you the engineer of record? I dont see a black and white compliant solution to this. Hard to justify sidewalls... need smooth flat ceiling. The ceiling pocket allowance might not apply because you're probably exceeding 1000cuft. Protect on the perimeter soffit and ask for a variance. Or ask...
  7. Danefre

    Just thought some would get a kick out of this one... the worst installation I have ever seen!

    That's amazing - thanks for sharing. It's honestly impressive that someone would put this much effort into doing everything wrong.
  8. Danefre

    Vehicle garage - sprinkler selection

    Just my opinion, but if you do label it OH2 and the contractor bids it that way, goes through design and submittals and the AHJ kicks it back saying it needs to be Extra Hazard, then all the fingers will be pointed at you. Owner will not be happy with a change order due to engineering...
  9. Danefre

    Vehicle garage - sprinkler selection

    Sorry to say this but this needs to be a deferred submittal. State on the drawings: "Design per NFPA 13 and all local codes and amendments" and leave it up to the contractor. The work you are trying to perform is done by registered FPEs that carry liability and E&O insurance. Since you're not...
  10. Danefre

    Hanging Issues in Attic

    That's odd that the AHJ is questioning this. Every wood construction building we've done, we've used SAMMYS as you describe, and as permitted by the listing. SAMMYS are UL listed and FM approved for those loads (4" pipe). Check out the GST30 The section you're looking for is 17.1.6.4. Other...
  11. Danefre

    Single floor Fire Protection system

    You need to start by determining what is required based on the building code, local amendments and AHJs direction. For Class I standpipe hose connections on horizontal exits refer to NFPA 14-2019 7.3.2.2.1 and IFC-2018 905.4. There's a lot more to it but that will get you started. Where is the...
  12. Danefre

    Warehouse Sprinkler Main Sizing

    Is this in the US? What state? FM Global requirements? Sorry to be a downer and not providing much help but have you consulted with a FPE licensed in your state? An FPE can gather all the info, make an educated determination of the hazard and provide design criteria so you can size the...
  13. Danefre

    Surveying Advice

    Some stuff off the top of my head: Strategies really depend on the condition of the site. ACT throughout would be a different approach than wide open demo'd shell space. 1. If you have the existing plans - identify which plan to draw on depending on the progress of the project. Some projects...
  14. Danefre

    NFPA 13 - Residential fire sprinklers in bedrooms

    Thanks, Travis - great explanation. The 2016 edition does make it crystal clear.
  15. Danefre

    NFPA 13 - Residential fire sprinklers in bedrooms

    Sorry to derail the thread but I wanted to clarify something Travis Mack mentioned. I was under the impression that NFPA 13 (2013) 8.6.2.1.2.1 only applies to Standard Spray heads - so most commonly in LH applications - QR heads. I'm not sure why but the NFSA article agrees with that. NFSA...

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