60-acre water supply system design criteria
60-acre water supply system design criteria
(OP)
Designing a domestic & fire water supply system for 60-ac mixed commercial/retail.
Very small municipal water dep't. will only supply static pressure test at an existing fire plug. We have survey of existing water system, length, pipe type, elevations, surface features (fire hydrants). No flow test, existing pump, reservoir or fitting information. Local fire marshal unresponsive.
No staff admits responsibility for supplying the fire flow requirement and duration, or existing domestic water system information & supply reqm'ts. I need information to analyse the existing, and proposed looped pipe, network to at least meet fire protection/max demand.
I get the impression that the municipality is short on professional engineering staff, and is between consulting engineering companies.
What basic questions should I ask city staff & fire marshal? Lacking answers and required design information, what simplifying assumptions can I make protecting life safety and domestic water quality to proceed with design?
If you have time for a short answer, what uniform codes are relevant?
Thanks!
Very small municipal water dep't. will only supply static pressure test at an existing fire plug. We have survey of existing water system, length, pipe type, elevations, surface features (fire hydrants). No flow test, existing pump, reservoir or fitting information. Local fire marshal unresponsive.
No staff admits responsibility for supplying the fire flow requirement and duration, or existing domestic water system information & supply reqm'ts. I need information to analyse the existing, and proposed looped pipe, network to at least meet fire protection/max demand.
I get the impression that the municipality is short on professional engineering staff, and is between consulting engineering companies.
What basic questions should I ask city staff & fire marshal? Lacking answers and required design information, what simplifying assumptions can I make protecting life safety and domestic water quality to proceed with design?
If you have time for a short answer, what uniform codes are relevant?
Thanks!





RE: 60-acre water supply system design criteria
RE: 60-acre water supply system design criteria
In terms of sources for fire protection design guidelines you could use the National Fire Protection Agency Pamphlet #24 and/or #13, look up on internet. In California we have our own local fire code that I would use for getting the minimum requirements for fire hydrant numbers & distances between hydrants, gpm out of those hydrants at a residual of no less than 20 psi, and other design criteria. We also have our own local plumbing code that helps in sizing domestic water lines for buildings. There are so many different requirements you will have to try very hard to work with your local municipalities. You will have your work cut out for you sizing pipes, meters, backflow devices, etc. Keep velocities in domestic pipes under 10 fps and in fire systems (outside the buildings) under 12 fps.
Good Luck!
Canman
RE: 60-acre water supply system design criteria
http://www.firehydrant.org/info/ftest1.html
This website has many interesting facts and humor for hydrants.