SYSTEM TYPES AND REQUIREMENTS 13-67
8- 10-8-1 The horizontal distance between pilot line detectors 8.10.9.2 Pilot line detectors located under open gratings shall
installed outdoors on a given level shall be permitted to be be spaced in accordance with the outdoor rules.
increased to 10 ft (3.0 m) when all of the following conditions 8.10.9.3 Where two or more adjacent water spray systems in
are met: one fire area are controlled by separate pilot line detector
( 1) The elevation of the first level does not exceed 15 ft systems, the detectors on each system shall be spaced inde
(4.6 m). pendently as if the dividing line between the systems were a
(2) The distance between additional levels does not exceed wall or draft curtain.
12 ft (3.7 m). 8.10.9.4 Where pilot line detectors are installed in water cool
(3) The pilot line actuators are staggered vertically. ing tower applications, they shall be in accordance with
8. 10.8.2 Alternate vertical spacing of pilot line detectors Section 27.26.
differing from those required in 8.10.8.1 shall be permitted 8.10.10 Pipe supplying pilot line detectors shall be permitted
where installed in accordance with their listing. to be supported from the same points of hanger attachment as
8.10.9 Pilot line detectors located in open-sided buildings the piping system it serves.
shall follow the indoor spacing rules. 8.10.10.1 Pipe supplying pilot line detectors shall not be
8.10.9.1 A row of pilot line detectors spaced in accordance required to meet the requirements of Section 18.5.
with the outdoor pilot line detector spacing rules shall be loca
ted along the open sides of open-sided buildings.
Shaded text = Revisions. .0. = Text deletions and figure/table revisions. • = Section deletions. N = New material. 2022 Edition
