I don't think any of these codes would apply to this situation as a water curtain as described above is within a sprinklered area, I think in this situation you would not be installing a water curtain, this would be more of a fire separation, IMO this is a bit outside of NFPA 13 and someone needs to determine an amount of water required to create the fire separation. The water curtain requires 3gpm per lineal foot but as a fire separation this may need to be increased.
Thanks Brett Peters General Manager Installation & Design Proudline Fire Protection Services Ltd. br...@proudline.ca 780 490 7602 office ext 202 780 490 7605 fax 780 777 0568 cell 780 718 2676 24h Visit us at www.proudline.ca On Mon, Mar 21, 2022 at 3:09 PM Sergio Braga <sergioweling...@gmail.com> wrote: > We have a small restaurant project where we are designing a water curtain > for fire separation of open kitchen and dining area. The building is not > required to be fully sprinklered. > > Regarding the hydraulic calculations for the water curtain, I will mention > the applicable code sections: > > NFPA13-2007: 11.2.3 Water Demand Requirements - Hydraulic Calculation > Methods. > 11.2.3.1.1 The water supply for sprinklers shall be determined only from > one of the following: > (1) Density/area curves of Figure 11.2.3.1.1 in accordance with the method > of 11.2.3.2 > (2) On the basis of the room design method in accordance with 11.2.3.3 > (3) Special design areas in accordance with 11.2.3.4, at the discretion of > the designer > > NFPA13-2007: 11.3 Special Design Approaches. > NFPA13-2007: 11.3.3 Water Curtains. > 11.3.3.1 Sprinklers in a water curtain such as described in 8.15.4 or > 8.15.16.2 shall be hydraulically designed to provide a discharge of 3 gpm > per lineal foot (37 L/min per lineal meter) of water curtain, with no > sprinklers discharging less than 15 gpm (56.8 L/min) . > 11.3.3.2 For water curtains employing automatic sprinklers, the number of > sprinklers calculated in this water curtain shall be the number in the > length corresponding to the length parallel to the branch lines in the area > determined by 22.4.4.1.1. > 11.3.3.3 If a single fire can be expected to operate sprinklers within the > water curtain and within the design area of a hydraulically calculated > system, the water supply to the water curtain shall be added to the water > demand of the hydraulic calculations and shall be balanced to the > calculated area demand. > 11.3.3.4 Hydraulic design calculations shall include a design area > selected to include ceiling sprinklers adjacent to the water curtain. > > If I perform the hydraulic calculation per density/area method the > existing water supply system will not be capable of meeting the demand. > However, I believe I am going to the wrong direction since this is only a > water curtain system, and I think the density and area of sprinkler > operation from FIGURE 11.2.3.1.1 is not applicable. > > What do you guys think? > > _________________________________________________________ > 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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