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When determining the most hydraulically remote area in a building, what takes precedent - the flow, or the pressure required?
In other words, when comparing two remote areas which are very similar, which would actually be considered the "true" remote area - an area with high volume and low pressure, or an area with low volume and high pressure? I am inclined to say that flow supersedes pressure, but since "hydraulic" deals with the relationship between the two, I'm not 100% confident. Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
8 Comments
Glenn Berger
6/21/2021 08:08:15 am
Both take precedent. The available water supply must meet all pressure and flow requirements of the sprinkler system. Plot the system demands vs. system supply on N185 paper to verify adequacy of system.
Shawn G
6/21/2021 08:23:00 am
Agree with Glenn. I compare it as percentage under the curve.
James Phifer
6/21/2021 08:33:49 am
I've always developed a K-factor for each of the areas and whichever had the largest K factor, would be considered my most demanding area.
Jesse Cecil
6/21/2021 08:39:34 am
They are both important. Make sure that the volume and pressure fall within the envelop of the supply. You can do it manually using N1.85 graph paper if you want.
Brian Cockburn
6/21/2021 09:00:15 am
In cases like this I calculate both areas and include each on the BP submission; better to over-calculate than the alternative.
Franck
6/21/2021 10:08:39 am
As already indicated above, both demands need to be under the water supply curve.
Casey Milhorn
6/21/2021 04:20:08 pm
What Glenn said. It really depends on your water supply curve. Look at it as a percentage of safety margin you have. Whichever has the least amount of safety margin is your more demanding system vs the water supply curve.
Craig Sider
6/25/2021 11:51:57 am
If I understand your question correctly, you are asking if you have two remote areas that are both acceptable under the water supply curve. One has a low flow and an high pressure demand, and one has a high flow and a low pressure demand. For sake of argument, I'll assume that they both have the same safety factor. Leave a Reply. |
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