At the point of two floors I’d encourage chat with FM office. Are they going to require separate water flow switch for each floor. This requires pipe and valve configuration to match.
Best. Bruce Verhei > On 12/19/2023 1:33 PM PST Prahl, Craig <[email protected]> wrote: > > > > The interstitial space has to be physically separated from the clean room > below so that no air flow migrates into the clean room space. So very, very > little chance of heat or smoke from the clean room migrating into the > interstitial space. > > > > The catwalk is above 2-feet above the clean room ceiling and the building > roof is about 15 ft overhead. > > > > The interstitial space covers the same area as the 700,000 sq. ft. clean room. > > > > 4.5.2.2 and 4.5.2.3 don’t match the conditions. > > > > Cliff, these microelectronic Fabrication facilities can and often exceed a > million sq. ft. of open area and can be multiple stories high. > > > > I’m going to declare it the same as two individual stories serving 52K SF > above and 52K SF below from one system and run with it. > > > > Craig Prahl | Jacobs | Fire Protection SME – Special Hazards | > [email protected] mailto:[email protected] | www.jacobs.com > https://urldefense.com/v3/__http:/www.jacobs.com/__;!!KZTdOCjhgt4hgw!-_khxU8gU0_6jc895I7kRbnU8JghRDsWgqOblZ4jr7Qp2IVbR30VYw_hWvNFtphnl0uWpB9KIvbYi1pvZz4$ > > 1041 East Butler Road Greenville, South Carolina 29606 > > CONTACT BY: Phone 1-864-676-5252 tel:1-864-676-5252, Email or MS TEAMS > > > > > > From: [email protected] <[email protected]> > Sent: Tuesday, December 19, 2023 3:49 PM > To: 'Discussion list on issues relating to automatic fire sprinklers' > <[email protected]> > Subject: [EXTERNAL] [Sprinklerforum] Re: Sprinkler system area determination > > > > Craig, > > > > I agree with Todd. Even if you considered the space as ‘another floor’, you > can sprinkler up to 52,000 sf per floor and you can do a “2-story” bldg. with > only one control assembly. > > > > BTW – 700,000 sf is a nice sized clean room 😊 > > > > Cliff Whitfield, SET > > President > > > > Fire Design, Inc. > > 940 Summerbrooke Dr > > Tallahassee, FL 32312 > > Ph: 828-284-4772 tel:828-284-4772 > > [Description: New FDI Logo-4.jpg] > > > > From: Fpdcdesign <[email protected] mailto:[email protected]> > Sent: Tuesday, December 19, 2023 3:13 PM > To: Discussion list on issues relating to automatic fire sprinklers > <[email protected] > mailto:[email protected]> > Subject: [Sprinklerforum] Re: Sprinkler system area determination > > > > What size are the equipment platforms? You might also need to look at 4.5.2.2 > and 4.5.2.3. > > > > Todd G Williams, PE > > Fire Protection Design/Consulting > > Stonington, CT > > 860-535-2080 tel:860-535-2080 (ofc) > > 860-554-7054 tel:860-554-7054 (fax) > > 860-608-4559 tel:860-608-4559 (cell) > > > > > > > On Dec 19, 2023 at 3:05 PM, <Craig Prahl mailto:[email protected]> > > wrote: > > > > I need a sanity check. > > > > > > > > I have a micro-electronics clean room area. H-5 occupancy. The > > interstitial space above is above 15 ft high and has catwalks which are > > above the cleanroom ceiling. Architects have deemed the interstitial space > > as “Equipment Platforms”, unoccupied space. > > > > > > > > Referencing IBC/IFC 2021, NFPA 13, 2019 > > > > > > > > Both the clean room and the interstitial space require full sprinkler > > protection per the building code, typically OH-2. > > > > > > > > Based on NFPA 13, the maximum area for the OH system is 52,000 sq. ft. > > > > > > > > Per 2019 NFPA 13, 4.5.2 if the area is considered a mezzanine there is no > > requirement to include the sq. footage of the interstitial space as part of > > the system area. However, the interstitial space has a substantial ceiling > > assembly between it and the occupied clean room below so it’s closer in > > definition to an attic space or non-combustible concealed space with no > > provision for storage. Access is restricted and limited. > > > > > > > > Overall the clean room is around 700,000 sq. ft. total so I’ve got a LOT of > > systems and am trying to determine size and quantity of riser rooms. > > > > > > > > So, does it make sense to not include the area of the interstitial space in > > determining the number of risers. Basically one OH system can cover 52,000 > > sf of clean room and 52,000 sq. ft. of interstitial space? > > > > > > > > > > > > Craig Prahl | Jacobs | Fire Protection SME – Special Hazards | > > [email protected] mailto:[email protected] | www.jacobs.com > > https://urldefense.com/v3/__http:/www.jacobs.com/__;!!KZTdOCjhgt4hgw!-_khxU8gU0_6jc895I7kRbnU8JghRDsWgqOblZ4jr7Qp2IVbR30VYw_hWvNFtphnl0uWpB9KIvbYi1pvZz4$ > > > > 1041 East Butler Road Greenville, South Carolina 29606 > > > > CONTACT BY: Phone 1-864-676-5252 tel:1-864-676-5252, Email or MS TEAMS > > > > > > > > > > --------------------------------------------- > > > > > > NOTICE - This communication may contain confidential and privileged > > information that is for the sole use of the intended recipient. Any > > viewing, copying or distribution of, or reliance on this message by > > unintended recipients is strictly prohibited. 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