§ 27-959 Siamese connections required.
AC § 27-959
(a)Where required.
(1)Siamese connections shall be provided in accordance with section 27-940 of article three of this subchapter, except as modified hereinafter.
(2)In below grade sprinkler systems for garage occupancies involving the storage or repair of motor vehicles, a siamese connection shall be provided within fifty feet of every exit or entrance used by motor vehicles.
(3)Where partial sprinkler protection is required for storage spaces, one siamese connection shall be provided when more than thirty-six heads are installed in one fire section. Areas subdivided, when the subdivisions are totally enclosed by noncombustible construction having at least a two hour fire-resistance rating, shall be considered separate fire sections and the number of heads in the largest section shall determine the necessity for siamese connections. When partial sprinkler systems are installed to protect entire floor areas, siamese connections shall be provided in accordance with section 27-940 of article three of this subchapter. In all cases where partial sprinkler protection is provided and siamese connections installed, metal signs shall be securely fastened to, or above, the siamese connection indicating the area protected. Where the building has two or more frontages, additional metal signs shall be installed indicating the location of the siamese connection.
(4)When a sprinkler system supplies a group of buildings, siamese connections shall be provided for each building as required by paragraphs one, two and three of this subdivision.
(5)A single three-inch (seventy-six millimeter) inlet fire department connection acceptable to the fire commissioner may be provided for the sprinkler system in lieu of each required siamese connection in buildings classified in occupancy group J-2 not exceeding six stories or seventy-five feet in height and in spaces classified in occupancy group J-2 in buildings not exceeding six stories or seventy-five feet in height.
(b)Installation and construction. The installation and construction of siamese connections shall be the same as required for fire standpipe systems, except that the caps of each automatic sprinkler siamese connection shall be painted green and the entire siamese connection of a nonautomatic sprinkler system shall be painted with aluminum paint, and except that caps of each siamese connection used for combination standpipe and sprinkler systems shall be painted yellow and signs provided as required in subdivision (b) of section two of reference standard RS17-1.
(c)A siamese connection need not be provided for a sprinkler system in one and two family dwellings. Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 1999/010.
