I use the HASS software to design, now I've a criterion of design of 20 ESFR K-25.2 @ 75 PSI, but I'm questioning if the density requirement and area of demand that I'm considering are correct. The values are 2.18gpm/ 2000 sqft. Is this correct? Additionally, the pump that I should be considering is approximately 4500 gpm and when I try to run the program it says that the source is incapable of feeding the grid. Thank you for help.
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5 Comments
Anthony
7/31/2023 07:50:33 am
You're going to need to go deeper into HASS to get its full usefulness out of it. Auto generate your gird if you'd like but then go into the system editor and assign the K factor and minimum flow/pressure to the heads and then calculate. The rest of the system should be 'headless' and just the sprinkler nodes should be flowing.
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Dan Wilder
7/31/2023 07:52:12 am
Based on 20 sprinklers discharging roughly 218 GPM, yes the density works out to ~2.18 GPM/FT² but what is the design criteria (for clarification..that critiria sounds FM but your Multiplier is showing 1.2 not the typical 1.4)?
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Jesse
7/31/2023 08:07:17 am
Probably. Coverage per sprinkler is a critical component of finding density.
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Pete H
7/31/2023 10:16:12 am
Has this been auto peaked? Does HASS auto peak? I'm used to HydraCAD.
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Mark Harris
8/1/2023 03:12:24 pm
Is it a booster pump from city supply or fire pump with storage tank? If booster pump error may be low suction supply. Usually need to stay above 20 PSI. Guessing a tank as that would be a challenge for most public water supplies. Especially for the pump at 150% flow test.
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