Glossary Term
A-60 Rating
An A-60 rating identifies an A-class fire division that has been tested to maintain fire integrity and insulation performance for 60 minutes under the standard fire test. SOLAS-based fire definitions describe A-class divisions as steel or equivalent bulkheads and decks that prevent the passage of smoke and flame to the end of the one-hour standard fire test, with temperature rise on the unexposed side limited within set values; the A-60 class corresponds to 60 minutes. The FTP Code is the fire-test framework used to verify those properties.
On yachts and superyachts, A-60 appears wherever fire boundaries separate higher-risk spaces from accommodation, escape routes, control spaces, or adjacent technical zones. Large-yacht code tables use A-60 repeatedly around machinery spaces of category A, certain service spaces, stairways, and other boundary conditions. The rating therefore belongs to a tested boundary system, not just to an insulation blanket or a panel sold in isolation.
The term affects design, penetration details, and refit decisions. Ducts, cable transits, pipes, doors, glazing, and fire dampers passing through an A-60 boundary need arrangements that preserve the approved fire performance of the division. That is why A-60 work usually sits inside a wider technical design package and survey path rather than as a late insulation choice once outfitting is already underway.