25.1.3.2* In-Rack Sprinkler System Control Valves. A.25.1.3.2 In-rack sprinklers and ceiling sprinklers selected for protection should be controlled by at least two separate indicating valves and drains. In higher rack arrangements, consideration should be given to providing more than one in-rack control valve to limit the extent of any single impairment.
*The control valves addressed in 25.1.3.2 are intended to allow isolation of the in-rack system from the ceilingsystem, as indicated in Exhibit 25.1. In-rack sprinklers are susceptible to damage due to their location.Control valves are required to allow the ceiling system to remain in service while an in-rack sprinkler isreplaced. Additionally, when the ceiling system is out of service, the valves are to be arranged so that thein-rack system remains operational.* 25.1.3.2.1 Unless the requirements of 25.1.3.2.2 or 25.1.3.2.3 are met, separate indicating control valves and drains shall be provided and arranged so that ceiling and in-rack sprinkler systems can be controlled independently. *Sprinklers and sprinkler piping installed in pallet racks are more likely to experience damage from forkliftsor other material-handling equipment. Providing a separate control valve allows the piping to be shutdown quickly without impairing ceiling-level protection for the entire area of the building.* I will be away from the office on Friday August 16th and will have limited access to phone and email. Thanks Brett Peters General Manager Installation & Design Proudline Fire Protection Services Ltd. [email protected] 780 490 7602 office ext 202 780 490 7605 fax 780 777 0568 cell 780 718 2676 24h Visit us at www.proudline.ca Proudline now offers ULc listed monitoring services, please contact [email protected] for more information On Mon, Aug 12, 2024 at 5:25 PM Hinson, Ryan <[email protected]> wrote: > Not exactly what you are looking for but take a peak at NFPA 13 (2022) > Section 19.3.3.3 regarding water curtains. As long as you include, *and > balance*, the additional demand in your calculations, it is my opinion > that you should be fine. > > > > I recall back in the day we used to do this. I looked in NFPA 13 (*2007*) > Section 22.8 and found the following: > > > > *22.8 In-Rack Sprinklers.* > > > > *22.8.1* > > * Pipes to in-rack sprinklers shall be sized by hydraulic calculations. * > > *22.8.2** Water demand of sprinklers installed in racks shall be added to > ceiling sprinkler water demand over the same protected area at the point of > connection.* > > > > *22.8.3** The demand shall be balanced to the higher pressure.* > > > > *22.8.4** Water demand of sprinklers installed in racks or water curtains > shall be added to the ceiling sprinkler water demand at the point of > connection. Demands shall be balanced to the higher pressure. (See Chapter > 8.)* > > > > I believe the reference to Chapter 8 was incorrect and should have instead > been to Chapter 11. > > > > Hope this helps, > > > > *Ryan L. Hinson**, PE*, SET*** \ Burns & McDonnell > > Associate Fire Protection Engineer \ Upper Midwest Region > > *O* 612-900-3755 \ *M* 763-688-4045 \ *F* 952-229-2923 > > *[email protected] <[email protected]>* \ burnsmcd.com > <http://www.burnsmcd.com/> > > 8201 Norman Center Drive, Suite 500 \ Bloomington, MN 55437 > > *Registered in: AK, LA, MD, MN, PA, TX, & UT > > **NICET IV - Water-Based Systems Layout > > > > *From:* James Crawford <[email protected]> > *Sent:* Monday, August 12, 2024 5:26 PM > *To:* [email protected] > *Subject:* [Sprinklerforum] In-Rack system connected to an adjacent system > > > > A question has been asked in our office regarding connecting an in-rack > system into an adjacent roof system. > > > > It is in a multi-tenant building that has multiple roof zones, the system > only has 11 heads but does not work when connected into the roof system in > that tenant space. > > > > Option is to run 500 feet back to the valve room or connect into an > adjacent roof system. > > > > We can not find anything that says you can’t but cannot find anything that > says you can. > > > > My concern would be monitoring of the zones, so you would have multiple > zones going off if there was a fire. > > > > Comments: > > > > Thank You > > > > James Crawford > > Phaser Fire Protection Ltd. > > Phone 604-888-0318 > > Cel: 604-790-0938 > > Email [email protected] > > Web: 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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