16.1.2* Sprinkler Protection Criteria
- The barrier shall be constructed of minimum 22 gauge (0.7 mm) sheet metal or of minimum 3/8 in. (10 mm) plywood.
- The barrier shall extend to both aisle faces of the racks, covering up both the longitudinal and the transverse flue spaces of the rack bays in which they are installed.
- The barrier shall be fitted to within 3 in. (75 mm) of any vertical rack member or other equipment that would create an opening, such as vertical in-rack sprinkler pipe drops.
(A) For double-row racks, sprinklers shall be installed at each rack upright within the longitudinal flue space and at the face of the rack and at the mid-bay face of each rack bay as shown in Figure 188.8.131.52.4.2(A).
(A) For multiple-row racks, an alternating sprinkler arrangement shall be installed within adjacent transverse flue spaces as shown in Figure 184.108.40.206.4.3(A), with sprinklers at the face of each flue space.
(B) The maximum linear spacing between sprinklers at the face and at each alternating bay shall not exceed 5 ft (1.5 m) and shall not exceed 10 ft (3.0 m) between sprinklers at every other bay.