Step 2 - Use only a non-hardening pipe joint compound or tape seal. Apply only to the male threads. 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. 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 ⦠8.2.5.2 Pendent Sprinklers. Distance from walls: half the distance between sprinkler heads (i.e. the Upright Sprinklers, and in the Pendent position for the Pendent Sprinkler, Pendent Recessed Sprinkler. SPRINKLER HEAD CONCEALED PENDENT TYPE NV007 / NV008 ... ceiling or application of the finish coating to a fixed ceiling. 8.2.5.2.1 Pendent sprinklers shall be located at least 3 ft (914 mm) away from obstructions such as ceiling fans and light fixtures unless the requirements of 8.2.5.4 are met. Find the listing on the sprinkler head, and it should have the distance requirements available. A cloud ceiling is simply a suspended ceiling that covers only a portion of a room or space below, typically to hide mechanical equipment. * * Most sprinkler heads will be installed 1â³ from the ceiling. NFPAâs 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. 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. There is no hard and fast rule on the distance. The simple scientific fact that heat rises is the basic component of fire safety. 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 placement is scientific as well as strategic. Step 4 - For Upright and Pendent Sprinklers, use a standard wrench. 8.2.5.2.2 The distance shall be measured from the center of the sprinkler to the center of the obstruction. 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 1â to 4â below ceiling (unless different in listing) 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. That is an urban legend according to a few sprinkler inspectors I've spoken to. Section 8.2.5.1.3 where the sprinkler cannot be located 3 ft away from the obstruction, an additional sprinkler ⦠It depends on the type sprinkler head. The Concealed Pendent Sprinklers all produce a hemispherical water distribution pattern below the deflector. 15â between sprinkler heads, 7.5â from walls) Minimum distance between sprinkler heads: usually 6â Distance from ceilings: minimum 1â, maximum 12â. Pendent Sprinklers 175 psi (12 bar) rated Bulletin 019 December 2020. 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