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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...

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

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...

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...

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...

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...

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...

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...

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

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...