I've been on a bit of a tool creation kick lately. Sorry, I just get excited sometimes.
This week I'm introducing a small portion of a much larger programming effort - this tool helps determine an adjusted fire sprinkler remote area based on the system type and density/area curves of NFPA 13. It can factor in the quick-response area reduction, sloped ceiling adjustment, double-interlock pre-action or dry increase, and high-temperature sprinkler decrease. I'll probably only have this up as a free version for a month or so before adding to it and incorporating the full tool in the Toolkit.
At the bottom of the tool you'll see a schematic remote area drawn with the parameters input. I'm using it when mocking up hydraulic calculations for estimation or when I'm first setting up a hydraulic calculation. Give it a shot and let me know what you think!
12/23/2019 01:31:19 pm
I'm a little bit confused as I always thought i should first reduce area by 25% for high temp sprk heads but not less than 2000 sf and then multiply by 1.3 for dry system. I would then end up with 2600 sf. 2500x0.75 = 1875 = 2000; 2000x1.3 = 2600.
12/24/2019 08:07:53 am
Great input Artur! This is a good discussion point so I've opened it up here: https://www.meyerfire.com/daily/when-to-apply-minimum-area-for-high-temp
12/24/2019 08:50:50 am
Yeah when I look at this again you're right. Because high temp area reduction mixes probably only with dry area addition. So they could just say reduction is not 25% but less. So we should check if the area is more than 2000 after all factors are applied. The same with concealed unsprinklered - I check at the end if it's above 3000 and not at before I multiply let's say by 1.3.
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Joe Meyer, PE, is a Fire Protection Engineer out of St. Louis, Missouri who writes & develops resources for Fire Protection Professionals. See bio here: About