Safety, Fire & Survival · Fire — Structural Fire Protection
On SOLAS vessels, what does an 'A-60' class division denote?
- AA door that automatically opens after 60 minutes
- BA combustible partition rated to burn for 60 minutes
- CA steel bulkhead/deck insulated so the unexposed side does not exceed set temperature limits for 60 minutes of a standard fire test✓ Correct
- DA 60-millimeter-thick aluminum panel
Explanation
'A' class divisions are of steel/equivalent, prevent passage of smoke and flame for one hour, and are insulated; the suffix (e.g., A-60, A-30, A-15, A-0) is the minutes the average unexposed-side temperature rise stays within limits in the standard fire test. A-60 is the highest insulation standard.
Authority: SOLAS II-2; FSS Code, structural fire protection
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