James, I think you have a legitimate question but not one that is going to be answered on the Forum. The pure NFPA 13 technical answer would be they need to be replaced because the sprinklers are not listed for rack storage. However, can the existing system be modified to provide adequate protection? Maybe. There are a lot of specifics that are not included here. You would probably need to get an engineer involved and discuss with the FM to come to a conclusion. 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 Jun 5, 2025 at 1:51 PM, <James Crawford (mailto:[email protected])> > wrote: > > > > > > We have a building with a 5’-0” overhang protected with high temperature dry > sidewall sprinkler heads. The owner would like to put some rack storage in > this location. > > > > > > > > Products stored are metal parts (Class 1 commodities) to be stored on a > single row rack, they would like to store to 16’-0”. > > > > > > > > The design works hydraulically (0.198gpm) > > > > > > > > NFPA defines Extra Hazard Occupancy as storage over 12’-0” and sidewall heads > are approved for extra hazard occupancies. > > > > > > > > So I guess my question is can we use the existing dry sidewall or do we need > to change to a dry system? Seems like a waste. > > > > > > > > Thank You > > > > > > > > James Crawford > > > > Phaser Fire Protection Ltd. > > > > Phone 604-888-0318 > > > > Cel: 604-790-0938 > > > > Email [email protected] (mailto:[email protected]) > > > > Web: www.phaserfire.ca (http://www.phaserfire.ca) > > > > > > > _________________________________________________________ SprinklerForum > mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to [email protected] >
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