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I could have sworn I've seen something in a code that says light and ordinary but it must have been one of those many nights I'm having nightmares about work! Don't lie, it's happened to you too ;) Thanks for all the input!

It turned out that the EPO couldn't even do what they wanted to do. NFPA 2001 says equipment should be shut down but if it can't be then gives another option (forget off the top of my bald head). The end result was the hvac shuts down before the time delay. The time delay is 20 seconds. Crac...

Isn't it strange that they only have a requirement for light hazard? I must be thinking of something else but I thought there was something stating it other than 8.3.3.1. This is for a preaction system if that helps any?

Can someone PLEASE help me out here. I know in the past I've seen a clear ruling in NFPA 13 showing that quick response sprinklers are required for new construction but I can't seem to find it. The only thing I can find is under thermal sensitivity but that states for light hazard. My...

yes, they want to add a delay basically for the discharge but they are not wording it that way. Smoke and mirrors basically. As far as I know, delays are for evacuation, not shutdowns.

I have a situation where the owner wants to change the sequence of operation so that the hvac shuts down via EPO upon discharge. I do not feel like this is possible due to the time sapphire is discharged within (10 seconds I believe). The crac units could potentially recirculate air as the...

That's what I figured. Thanks to the both of you. Travis, where can I find that in some literature or maybe NFPA?

Is there a way to tell the difference between standard response sprinklers and quick response sprinklers by looking at the them? My guess is by looking at the fusible link. From what I notice, standard response seems to have a thicker glass bulb. However, I'm only looking at 2 sprinklers so...

I'm confused. Have I been reading this wrong the entire time? The chart I refer to is for floor/suspended obstructions which would be the light fixture I am refering to. If the light is hung 15" from the ceiling and a sprinkler is 32" away (on a horizontal plane) according to the book the spray...

The lights are not a solid obstruction. They hang from the ceiling by a very think wire. As I said, they are suspended.

I'm not sure I understand your question fully but if you see section 14.4.4.3, Design Densitites, that may help you out. In my understanding of your question, it sounds like if you calculate the highest demanding sprinklers, you can omit the sprinklers above or below the ceiling. Whichever is...

I have a situation where there is suspended lighting 15" below ceiling. The lights are 1'-0" wide. By following the chart in NFPA for floor mounted/suspended obstructions I need to be 24 inches up to 30 inches away from the light in order for spray pattern to clear the fixture. Is there any...