[image: image.png] 18 risers , 40,000 sqft (cherry picked the dimensions)
On Tue, Dec 19, 2023 at 12:05 PM Prahl, Craig <craig.pr...@jacobs.com> 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 | > craig.pr...@jacobs.com | 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, 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. If you have received this > message in error, please notify us immediately by replying to the message > and deleting it from your computer. > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > sprinklerforum-le...@lists.firesprinkler.org >
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