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NC-2009 SSc6.1:Stormwater Design—Quantity Control

unit (cf/storm)

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Ameet AA
LEEDuser Basic Member
27 thumbs up

My project is using Option 1: Design stroms,Case 2 :Site with existing imperviousness mote than 50% LEED online template V 5.0 Table 6.1-3 Site runoff: Two year,24 hour Design storm quantity is requested to fill in cf/storm Just wish to re-confirm that the cf/storm stand for cubic feet per storm? Civil engineer had provided me a value in cubic meter 8900m3 per storm. Am I correct to fill that in form as 314300 cf/storm (using 1 cubic foot = 0.02831685 cubic meter) Thank you

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Michael DeVuono
Regional Stormwater Leader
Arcadis North America
LEEDuser Expert
144 thumbs up

Tue, 06/18/2013 - 14:57

Cubic feet/second
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Ameet AA
LEEDuser Basic Member
27 thumbs up

Wed, 06/19/2013 - 09:27

Thank you Michael . LEED 2009 NC online template version 5 mentions cf/storm and not cfs. am i missing something? How to convert m3 into cubic feet/sec now?
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Michael DeVuono
Regional Stormwater Leader
Arcadis North America
LEEDuser Expert
144 thumbs up

Wed, 06/19/2013 - 12:06

It appears they are looking for total volume (quantity), not the rate, if that is the case the units are simply CF, convert your m^3 to f^3. I would put the total volume in this block and move on. CF/sec measures the rate, the volume that runs off per second. I am working on cleaning up a lot of this language for v4, so it is in actual engineering terminology.

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