Thanks. That is what I needed confirmed. Tony ----- Original Message ----- From: "Craig Prahl" <[email protected]> To: [email protected] Sent: Wednesday, June 18, 2014 9:58:37 AM Subject: RE: 2 hour fire water supply
There is no magic to the 2-hour duration. Duration is hazard dependent. If someone uses 2-hours for everything, they are in error. Craig L. Prahl Fire Protection Group Lead CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29303 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Tony Silva Sent: Wednesday, June 18, 2014 11:55 AM To: [email protected] Subject: Re: 2 hour fire water supply Referring to 13, 2002 15.1.2 states "Water supplies shall be capable of providing the required flow and pressure for the required duration as specified in Chapter 11, Chapter 12, and Chapter 13." Then these chapters give various durations, starting from 30 minutes (light hazard) to as much as 3 hours (higher hazard). However, I have seen the two hour requirement being used for all types of occupancies and was wondering if this was a requirement in 13. Tony ----- Original Message ----- From: "Todd - Work" <[email protected]> To: [email protected] Sent: Wednesday, June 18, 2014 9:24:19 AM Subject: Re: 2 hour fire water supply Look up water supply duration in 13 Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT www.fpdc.com 860-535-2080 (ofc) > On Jun 18, 2014, at 11:08 AM, Tony Silva <[email protected]> wrote: > > Can anyone tell me from where the requirement for the two hour supply comes > from? Is it a code requirement? If so, which? > > Thanks, > > Tony > > ----- Original Message ----- > From: "Karen Lesko" <[email protected]> > To: [email protected] > Sent: Thursday, June 12, 2014 7:40:10 PM > Subject: 2 hour fire water supply > > When evaluating fire water supply to ensure there is a 2 hour supply, > do I have to take the head pressure loss of the fire water tank level > drop into account over the 2 hours? The tank has makeup from wells > that have normal and back-up power, and the well makeup into the fire > water tank equals the output of the fire pump. > > Thank you in advance, > > Karen Lesko > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
