Rack storage with and without fire protection

This is a video of two test fires, one with sprinklers one without. The storage is exactly the same in both about 9 ft. in an approximately 13 ft building. Use K8 sprinkler with a class 3 commodity.

[hangchung]

May I ask the pressure per sprinkler head in the test?

[pattycarljackson]

In rack sprinklers would have been better.