66.16.6.6 Fire Protection System Design Scheme "F."

In-rack sprinklers shall meet the following requirements:

1. In-rack sprinklers shall be ordinary temperature-rated, quick-response sprinklers.
2. In-rack sprinklers shall have a K-factor of 8.0 (115) or 11.2 (160).
3. In-rack sprinklers shall be installed on 20 ft (6 m) vertical increments in accordance with Figure 66.16.6.6.1(a) and Figure 66.16.6.6.1(b) with the in-rack pattern shown in Figure 66.16.6.6.1 (b) repeated from rack face to rack face for multiple-row racks.
4. In-rack sprinklers shall provide a minimum discharge flow of 30 gpm (110 L/min) out of the hydraulically most remote sprinkler as follows:
   1. Six in-rack sprinklers on one level if one level of in-racks (6 total)
   2. Six in-rack sprinklers on two levels if two levels of in-racks (12 total)
   3. Six in-rack sprinklers on three levels if three or more levels of in-racks (18 total)

[30:16.6.6.1]

If there are adjacent bays of rack storage that are not dedicated to ignitible (flammable or combustible) liquid storage, the in-rack sprinkler protection shall be extended at least 8 ft (2.4 m) beyond the area devoted to ignitible (flammable or combustible) liquid storage. [30:16.6.6.2]

The ceiling and in-rack sprinkler demands shall be balanced at the point of connection to the water supply. [30:16.6.6.3]

A 500 gpm (1890L/min) hose stream allowance shall be provided. [30:16.6.6.4]

A 1-hour duration shall be provided for the fire protection water demand. [30:16.6.6.5]