Our design is dealing with sprinkler protection for rack storage of cartoned group A plastics. Due to a height of over 25 ft (7,6m) the arrangement drawn in Figure 220.127.116.11 (b) has been chosen for single and double row racks. What is the maximum vertical distance between in-rack sprinklers for this arrangement? My question is: Is it 10ft (3,0m) as it is defined in note nr.6?
Furthermore, in Chapter 16, and in other case, Figure 18.104.22.168.1.1 (A) (i), has been chosen. There is also a note nr.6 which defines the maximum vertical distance of in-rack sprinklers to 10ft (3,0m), but table 22.214.171.124 says vertical spacing is 20ft (6,1m).
Could you correct my understanding for both cases, please? Thank you in advance.