Step 3 - Hand tighten the sprinkler into fitting. RFII-MRI Non-Magnetic Model Concealed Pendent Sprinkler Quick & Standard Response, Standard Coverage, K-factor=5.6 ILLUSION Extra Large Orifice Concealed Pendent Sprinklers Quick Response, Standard Coverage, K-factor=11.2 Model RFII Model RFII 5.6 K-factor Horizontal Sidewall Flat Plate Concealed Sprinklers Quick Response, Standard Coverage NFPA’s technical advisory program, which gives NFPA members an opportunity to ask questions relating to code requirements, receives multiple questions each week on how to locate sprinklers when cloud ceilings are present. Distance from walls: half the distance between sprinkler heads (i.e. The residential code says pendant sprinklers must be at least 3 ft from obstructions such as ceiling fans and lights (as measured from their centers), or you can use this table which relates A) the distance from the sprinkler to the near edge of the obstruction and B) height of the sprinkler's deflector above the bottom of the obstruction. Ceiling Distance 18 x 18 (5.5 x 5.5) 21 (80) 7.6 (0.52) 1 to 4 inches (25 to 100 mm) 20 x 20 (6.1 x 6.1) 23 (87) 9.2 (0.63) Model F1Res76 Residential Pendent Sprinkler Hydraulic Design Criteria Table E Notes: 1. 15’ between sprinkler heads, 7.5’ from walls) Minimum distance between sprinkler heads: usually 6’ Distance from ceilings: minimum 1”, maximum 12”. Step 2 - Use only a non-hardening pipe joint compound or tape seal. Apply only to the male threads. the Upright Sprinklers, and in the Pendent position for the Pendent Sprinkler, Pendent Recessed Sprinkler. A cloud ceiling is simply a suspended ceiling that covers only a portion of a room or space below, typically to hide mechanical equipment. Sprinkler placement is scientific as well as strategic. Model JL14 Sprinkler Components and Dimensions Figure 1 ... Sprinkler Distance to Ceiling See NFPA 13 See FM Global 2-0 Open Frame, Single, Double, Multiple Row, or Portable Rack Storage of Class I … Section 8.2.5.1.3 where the sprinkler cannot be located 3 ft away from the obstruction, an additional sprinkler … The Concealed Pendent Sprinklers all produce a hemispherical water distribution pattern below the deflector. Pendent Sprinklers 175 psi (12 bar) rated Bulletin 019 December 2020. Step 4 - For Upright and Pendent Sprinklers, use a standard wrench. Placing the sprinkler too low from the ceiling puts the sprinkler head out of the range of the accumulating heat and lessens its ability to sense danger. Sprinkler heads are referred to simply as sprinklers ... for example minimum distance between sprinklers on slopped ceilings ... (pressure and flow must satisfy the relation flow rate = k factor X square root of the pressure • Pendent sprinklers within 1” to 4” below ceiling (unless different in listing) That is an urban legend according to a few sprinkler inspectors I've spoken to. There is no hard and fast rule on the distance. Find the listing on the sprinkler head, and it should have the distance requirements available. 8.2.5.2 Pendent Sprinklers. * * Most sprinkler heads will be installed 1″ from the ceiling. NFPA13 D Section 8.2.5.1.1 Pendent sprinklers shall be located at least 3 ft away from obstructions such as ceiling fans and light fixtures. 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