High-rises circa 1980 in Phoenix met a similar requirement by having a fire pump that took suction from a tank that was automatically filled from the public supply. Lose the public underground supply, you still had a tank full of water to supply the building fire protection system.
Dwightr ________________________________ From: "Johnson, Duane (NIH/OD/ORS) [C]" <[email protected]> To: "[email protected]" <[email protected]> Sent: Tuesday, August 13, 2013 10:11 AM Subject: RE: High rise- non seismic zone - 2 water supplies? Then the IBC requires a connection to two water mains or two connections to one water main so that interruption to service can be isolated so that the water supply will not be interrupted. Section 104.10 can be used by the owner. This gives the building official a provision to grant a modification do due practical difficulties. By lessening compliance with the section above, the modification will not lessen fire protection or life safety, it only lessens reliability. After all, there is an FDC... Duane Johnson, PE Program Manager Division of the Fire Marshal (Contractor) Office of Research Services National Institutes of Health 301-496-0487 "Protecting Science - One Sprinkler at a Time" -----Original Message----- From: Martinez, Dewayne [mailto:[email protected]] Sent: Tuesday, August 13, 2013 10:02 AM To: [email protected] Subject: RE: High rise- non seismic zone - 2 water supplies? Complete remodel of the building forcing them to bring it up to current code. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Johnson, Duane (NIH/OD/ORS) [C] Sent: Tuesday, August 13, 2013 7:56 AM To: [email protected] Subject: RE: High rise- non seismic zone - 2 water supplies? What has caused the need to go back and sprinkler?? Duane Johnson, PE Program Manager Division of the Fire Marshal (Contractor) Office of Research Services National Institutes of Health 301-496-0487 "Protecting Science - One Sprinkler at a Time" -----Original Message----- From: Johnson, Duane (NIH/OD/ORS) [C] Sent: Tuesday, August 13, 2013 8:55 AM To: [email protected] Subject: RE: High rise- non seismic zone - 2 water supplies? Section 403.3.2 requires a high rise with a fire pump to be connected to a minimum of two water mains. There is a performance based exception however. Section 903.3.5.2 requires an additional "on-site" water supply for new high rise buildings in seismic zones C, D, E or F. The "on-site" water supply is different from the water supply that is brought "to the site" (ie underground water main). There is an exception for existing buildings. The requirement is to increase reliability in the event of a seismic activity. Over to you Steve... Duane Johnson, PE Program Manager Division of the Fire Marshal (Contractor) Office of Research Services National Institutes of Health 301-496-0487 "Protecting Science - One Sprinkler at a Time" -----Original Message----- From: Martinez, Dewayne [mailto:[email protected]] Sent: Monday, August 12, 2013 5:57 PM To: [email protected] Subject: High rise- non seismic zone - 2 water supplies? IBC (09ed) sections 403 and 903 I have an existing un-sprinkled high rise building that now needs to be fully sprinkled per NFPA 13 (07ed) and will require a fire pump. I think it will require two sources of water supply but I just want to confirm. Section 403.3 requires a secondary water supply where required by 903.3.5.2. 903.3.5.2 requires 2 sources if I am in a seismic zone, which I am not, but 403.3.2 seems to trump this by requiring a second supply when a fire pump is installed. Am I interpreting this correctly? Thanks, Dewayne _______________________________________________ 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 _______________________________________________ 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
