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16.1.2.4.3 Horizontal Barriers
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Horizontal barriers shall be installed at every tier level of the dedicated storage rack where the rack is equipped with solid shelves.
Where the dedicated storage rack is open-frame, horizontal barriers shall be installed at vertical increments not exceeding 12 ft (3.6 m).
The barriers shall span horizontally so that all flue spaces within the rack bay are covered.
A maximum 3 in. (75 mm) wide gap shall be permitted at rack uprights.
The solid barrier shall be installed on a horizontal plane within a rack, beneath which in-rack sprinklers shall be installed, as follows:
- 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.
Related Code Sections
16.1.2.4.3 Protection of Rack Storage of Class I Through Class IV Commodities, Horizontal Barriers
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Standard for the Installation of Sprinkler Systems 2016 of New York State > 16 Protection of Rack Storage of Class I Through Class IV Commodities > 16.1 General > 16.1.2* Sprinkler Protection Criteria > 16.1.2.4 Alternative Protection > 16.1.2.4.3 Horizontal Barriers
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2806.5.6 Aerosols, Horizontal Barriers
Horizontal barriers constructed of minimum 3 / 8 -inch-thick (10 mm) plywood or minimum 0.034-inch (0.086 mm) (No. 22 gage) sheet metal shall ...
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3.9.3.5 Definitions, Horizontal Barrier.
A solid barrier in the horizontal position covering the entire rack, including all flue spaces at certain height increments, to prevent vertical fire ...
Standard for the Installation of Sprinkler Systems 2013 of New York State > 3 Definitions > 3.9 Storage Definitions > 3.9.3 Rack Storage > 3.9.3.5 Horizontal Barrier.
3.9.3.5 Definitions, Horizontal Barrier.
A solid barrier in the horizontal position covering the entire rack, including all flue spaces at certain height increments, to prevent vertical fire ...
Standard for the Installation of Sprinkler Systems 2016 of New York State > 3 Definitions > 3.9 Storage Definitions > 3.9.3 Rack Storage > 3.9.3.5 Horizontal Barrier.