During repairs it is necessary to replace existing vessel bulkhead. Drawings indicate the bulkhead is A60. "A" indicates which of the following? |
A) "A" class bulkheads must not allow flame or smoke passage for 30 minutes when subjected to a fire test |
B) "A" class bulkheads must not allow flame or smoke passage for 15 minutes when subjected to a fire test |
C) "A" class bulkheads must not allow flame or smoke passage for 120 minutes when subjected to a fire test |
D) "A" class bulkheads must not allow flame or smoke passage for 60 minutes when subjected to a fire test |