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Fire command center could be another name for security office. If you're going to have a security office, it makes sense to put the fire alarm and other safety related panels in there also, even if regulations don't specifically require a fire command center. And to reinforce what other's...

It makes sense not to require column protection as the design goal of ESFR is to stop the fire dead rather than just slow it down. FM Global have done a lot of full scale tests. If the sprinkler is listed for your particular hazard, you can be confident that the sprinklers will put the fire...

It seems you need something weather proof, but most fire rated products aren't designed for outdoor use. Maybe you could use intumescent paint.

The best way to stop a CNG jet fire would be to turn off the flow. If you were to extinguish it some other way, there would still be a jet of CNG which would create an explosion hazard.

1. Yes 2. Use pipe made from non-corroding material. 3. Not a safety issue, but an environmental issue. 4. No (see number 2).

Reliability isn't normally an issue for listed equipment.

I'm interested in the answer to this myself as I live in Dubai and work on project around the Middle East. There has been some interest from the authorites recently on getting seismic design right. It seems Qatar has a low seismic hazard and office buildings are low priority - the answer to...

As other posters have suggested, it's possible the sprinkler system still complies due to the coverage overhead - but this isn't necessarily the case because they may be obstructed. Why do you suppose there are sprinklers above the ceiling? Is it combustible construction?

I agree with you that it will slow down the sprinklers. If you remove some ceiling tiles and there is a fire under the place where the ceiling tiles were, then the hot air will rise up past the ceiling line without setting off any ceiling level sprinklers. The arragement you describe is...

I think the system will need to be filled with water so it can be pressure tested. If that's the case, there should be a way of getting the water out after testing.

It would be a good idea to get as much of the water out as possible to avoid corrosion. Even if the pipe is galvanised, I think it would be a good idea to get the water out.

'So, the required flow is 12x158=1896 gpm' The required flow is different to this. The minimum gpm is 158 but some sprinklers will be discharging more than others depending on the hydraulics. If you are doing a preliminary design for estimating purposes, you should add a 'wastage' allowance...

NFPA 15 will tell you how to build a water spray system for exposure protection, but it won't tell you whether or not you need one for your application. That will be covered by some other code, or alternatively, by a project specific engineering assessment.

Seems clear enough to me. Horizontal exits don't necessarily require standpipes but fire escape stairways do. Are you familiar with the difference between horizontal exits and fire escape stairways?

This begs the question, are you getting a building permit to build this? If so, what building code does the AHJ (authority having juristiction) require? Do they require you to engage an architect? If so, talk to him about what codes are applicable. If you weren't planning on getting a...

I'm inclined to agree that there doesn't seem to be a problem with using a butterfly valve per se. I think either the valve was defective (loose spindle perhaps) or there was some other problem that was fixed at the same time and the contractor didn't draw attention to it. The manufacturers...

Interesting - thanks for the update. I wouldn't have guessed that would fix it.

That's interesting Stookeyfpe. What do you mean by governmental jurisdiction? Is that a development funded by the federal government? Presumably every public utility is under some kind of government juristiction, probably the city or the county. When I was working in the US as a sprinkler...

If you want to use a code to give you hydrant flows, you can use NFPA 1 or the IFC but the numbers in these standards are huge (like 2500 GPM as you've found). Not many people use these standards for urban design. Usually in a case like this you would take your drawings to the local fire...

I've seen similar flow meter arrangements work fine - I don't think there is a fundamental problem with the idea of using a butterfly valve to throttle that pressure and flow. The pulsing of the flow could be caused by air leaking into the pump. Is there a pressure gauge on the pump inlet...