Is 60 minutes fire-rating enough?

Yes, in general, this is always enough! A fire can burn for many hours, but it cannot maintain the same temperature in the one and same place for 60 minutes, unless it is supplied with new energy or if there are extreme conditions prevailing at the site. Normally, it can be as hot as 1000° for a few minutes (10-15) in a room, because the combustion of the available energy is then very fast. The seat of the fire them moves on, allowing the temperature in the room where the cabinet is placed to fall.