Abstract: A method of protecting commodities stored in a plurality of adjoining racks, having a vertical flue space provided between a set of racks of the plurality of adjoining racks, includes covering a rack, of the plurality of adjoining racks, and the vertical flue space with one or more solid horizontal barriers provided at a predetermined height. Each solid horizontal barrier has a width that is at least equal to a width of the rack and a depth that is at least equal to a sum of a depth of the rack and a depth of the vertical flue space. The method also includes providing one or more rack-level fire protection sprinklers in the vertical flue space below a solid horizontal barrier, of the one or more solid horizontal barriers, each rack-level sprinkler being vertically spaced from the commodities stored on the rack that is covered by the solid horizontal barrier.

Abstract: A fire protection sprinkler system includes one or more solid horizontal barriers that cover a rack, of a plurality of adjoining racks, and a vertical flue space between adjacent racks. Each barrier is provided at a predetermined height, and has a width that is at least equal to a width of the rack and a depth that is at least equal to a sum of a depth of the rack and a depth of the vertical flue space. In addition, one or more rack-level fire protection sprinklers are connected to a fluid supply conduit, and are disposed in the vertical flue space above or below a solid horizontal barrier. Each of the one or more rack-level sprinklers is vertically spaced from the commodities stored on a rack, of the plurality of adjoining racks, that is covered by the solid horizontal barrier.

Abstract: A fire protection sprinkler system is provided for the protection of commodities including Class I-IV hazards, Group A cartoned and exposed plastics (expanded and unexpanded), flammable liquids, tires, roll paper, and aerosols, stored in a plurality of adjoining racks having a longitudinal flue space between the racks. The system includes at least one fluid supply conduit in fluid communication with a source of a fire protection fluid. The system also includes at least one solid horizontal barrier covering each rack and the longitudinal flue space at a predetermined vertical spacing. The system further includes one or more rack-level fire protection sprinklers in fluid communication with the fluid supply. The sprinklers are disposed in the vertical flue space between adjacent horizontal barriers, and each sprinkler is spaced vertically from the commodities stored between adjacent horizontal barriers.

Abstract: A fire protection sprinkler includes a body having an input end and an output end, the body having an output orifice at the output end. The sprinkler includes a frame extending from the body in the output direction and a deflector supported by the frame positioned opposite the output orifice. Also, the sprinkler includes a seal assembly which seals the output orifice. The seal assembly has a first side and a second side, the first side bearing identifying indicia associated with the orientation of the seal assembly. When the first side is oriented in the input direction, a portion of the indicia is visible from the input end, to indicate a correct assembly. However, when the first side is oriented in the output direction, none of the indicia is visible from the input end, indicating incorrect assembly. The identifying indicia can take the form of one or more of the following: a color, a character, a symbol, and a mark.

Abstract: A fire protection sprinkler system is provided for the protection of commodities including Class I-IV hazards, Group A cartoned and exposed plastics (expanded and unexpanded), flammable liquids, tires, roll paper, and aerosols, stored in a plurality of adjoining racks having a longitudinal flue space between the racks. The system includes at least one fluid supply conduit in fluid communication with a source of a fire protection fluid. The system also includes at least one solid horizontal barrier covering each rack and the longitudinal flue space at a predetermined vertical spacing. The system further includes one or more rack-level fire protection sprinklers in fluid communication with the fluid supply. The sprinklers are disposed in the vertical flue space between adjacent horizontal barriers, and each sprinkler is spaced vertically from the commodities stored between adjacent horizontal barriers.

Abstract: An enhanced protection extended coverage pendent fire protection sprinkler has a body including a fluid passage and an output orifice sealed with a seal cap, two arms extending from the body and meeting at a hub, a release mechanism with a thermally-responsive element positioned between the seal cap and the hub, and a deflector positioned on the hub and facing the output orifice. The deflector includes a pair of aligned slots, aligned with a plane of the arms, and a pair of perpendicular slots, perpendicular to the aligned slots and having a width that is less than that of the aligned slots. The deflector further includes a pair of corner slots, positioned between the aligned slots and the perpendicular slots. Angled slots are positioned between the aligned slots and the corner slots and between the perpendicular slots and the corner slots.

Abstract: A pendent fire protection sprinkler for storage applications, having a body including a fluid passage and an output orifice sealed with a seal cap, two arms extending from the body and meeting at a hub, a release mechanism with a thermally-responsive element positioned between the seal cap and the hub, and a deflector positioned on the hub and facing the output orifice. The deflector has aligned slots at about 90° from each other, corner slots located between the aligned slots, and angled slots located between the aligned slots and the corner slots.

Abstract: A sidewall fire protection sprinkler including a deflector having a central portion curved about a transverse axis from an output direction of the sprinkler. End portions extend along the transverse axis outwardly from the central portion. The end portions have an upper part and a lower part separated by a gap. Planar portions extend in the output direction from a top edge of the end portions.

Abstract: A horizontal sidewall fire protection sprinkler is provided, including a deflector having a vertical face, transverse to the fluid flow from the output orifice, and a horizontal shelf positioned above and perpendicular to the vertical face. A portion of the horizontal shelf extends in the fluid flow direction by a first length, with respect to the vertical face, and this first length is less than about half of a total length of the horizontal shelf in the fluid flow direction. The sprinkler is installed in a support cup having a raised mounting platform configured to receive the sprinkler body and a cylindrical outer surface, with a front edge in a fluid flow direction, and a back edge. The mounting platform of the support cup is closer to the front edge of the support cup in an axial direction thereof than to the back edge.

Abstract: A horizontal sidewall fire protection sprinkler is provided, including a deflector having a vertical face, transverse to the fluid flow from the output orifice, and a horizontal shelf positioned above and perpendicular to the vertical face. A portion of the horizontal shelf extends in the fluid flow direction by a first length, with respect to the vertical face, and this first length is less than about half of a total length of the horizontal shelf in the fluid flow direction. The sprinkler is installed in a support cup having a raised mounting platform configured to receive the sprinkler body and a cylindrical outer surface, with a front edge in a fluid flow direction, and a back edge. The mounting platform of the support cup is closer to the front edge of the support cup in an axial direction thereof than to the back edge.