Page 9 - Maximizing installation flexibility and storage capacity using ESFR Storage Sprinklers
P. 9

 Figure 2 - Plan view of a full scale fire test arrangement
While the increased aisle width can improve the chances of
a successful fire test, it can have a negative impact on the amount of commodity a warehouse can store. Warehouse capacity is estimated by calculating the number of double row racks that can be placed in a given area of the warehouse and subsequently calculating the number of pallet loads that can be stored in the double row racks. Figure 3 depicts a theoretical warehouse that has a floor space used to house double row racks. For the purpose of simplicity, the space used for the calculation is a 200 feet (61m) by 200 feet (61m) area. Dimension B is the dimension available for the length
of the racks and Dimension A is the dimension used to determine the number of racks that can be placed in the area.
     Target –
Single Row Rack
Target –
Single Row Rack
Main Array – Double Row Rack
   Commodity ignition in the target array significantly increases the fire’s heat release rate and increases the challenge to sprinklers’ distribution patterns. The high intensity fire can redirect the water spray upwards and towards surrounding sprinklers, cooling them and delaying or preventing their operation – a phenomenon called “skipping.” The combination of aisle jump and sprinkler skipping typically leads to an unsuccessful fire test. Increased aisle width mitigates the risk of a fire test failure by making aisle jump more difficult.
Figure 3 - Plan view of placing double row racks separated by aisles
 4’ clearance to wall on both ends
               Building Dimension A - Perpendicular to Racks
Building Dimension B - Parallel to Racks
Aisle
Aisle



















































































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