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, 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 [email protected] >
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