Yes the heads in the .17 are 5.6K and those in the .40 area are 11.2 K. Also have an issue with several heads in the .40 area not flowing minimum required. The heads in the .17 area are flowing over 50% more than they need to.
I thought I had read somewhere about not using heads with different k-factors on the same system, Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Morey, Mike Sent: Tuesday, April 03, 2012 11:36 AM To: [email protected] Subject: RE: mixing densities in same calculated area Wouldn't the most hydraulically remote head (clearly one of the .40s) drive the end head pressure and more than likely drive up the density of the other sprinklers to .40 also, unless of course they used differing K factors? Mike Morey, SET, CFPS Sprinkler Designer BMW Constructors, Inc. O: 317.651.0596 | C: 317.586.8111 www.bmwc.com ________________________________ From: [email protected] on behalf of [email protected] Sent: Tue 4/3/2012 11:25 AM To: [email protected] Subject: RE: mixing densities in same calculated area The sprinks in the .17 area are adjacent to the main so they are the least remote by either definition. There are sprinks within the .40 area that would be more remote, hydraulically. Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Todd Williams Sent: Tuesday, April 03, 2012 11:23 AM To: [email protected] Subject: Re: mixing densities in same calculated area Would it be an issue of hydraulically most remote vs physically most remote? At 11:17 AM 4/3/2012, you wrote: >Got a submittal package where the contractor has two divided rooms. One is >0.40/3000 and adjacent room is .17/2000. He is calculating the .40 area and >has extended his hyd remote area beyond the wall of the room into the adjacent >.17 area and calced about 8 heads. >The .40 room is plenty large enough to allow the additional sprinklers to be >calced from within the room. > >Off the top of your head does anyone know where this type of thing is >addressed within NFPA 13? > >Craig L. Prahl, CET >Fire Protection >CH2MHILL >Lockwood Greene >1500 International Drive >Spartanburg, SC 29304-0491 >Direct - 864.599.4102 >Fax - 864.599.8439 >CH2MHILL Extension 74102 >[email protected] > >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum -------------- next part -------------- A non-text attachment was scrubbed... Name: winmail.dat Type: application/ms-tnef Size: 5761 bytes Desc: not available URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20120403/77412885/attachment.bin> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
