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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

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

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

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

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

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...

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

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

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

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

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...

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

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...

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

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

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

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

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

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

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