from NFPA 13, 2013
> 8.7.4.2 Deflector Orientation. > 8.7.4.2.1 Deflectors of sprinklers shall be aligned parallel to > ceilings or roofs. > 8.7.4.2.2 Sidewall sprinklers, where installed under a sloped > ceiling with a slope exceeding 2 in 12, shall be located at the > high point of the slope and positioned to discharge downward > along the slope. > This section has been in NFPA 13, for a long time and has continued onto the current edition. As per this section, there is only one option for locating sidewall sprinklers under a steeply sloped roof. At the peak. to discharge downward along the slope. I have a situation where the sloped piping is along a wall with the floor area being covered with two sidewall sprinklers. The deflectors of both sprinklers are installed parallel with the roof slope, positioned to discharge across the slope.The uppermost sidewall is located within 3 feet of the peak. I have been told that this configuration is incorrect as it is not permitted in NFPA 13. Although it is not covered in NFPA, this orientation of sidewall sprinklers is shown in the residential sprinkler installation guides of all major manufacturers. Further, complying with 8.7.4.2 is problematic if the roof slopes both ways with the peak at the high point. Any thoughts / comments? Tony
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