Spanish translation: calificación de resistencia al fuego
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English to Spanish translations [PRO] Tech/Engineering - Other / Safety equipment
English term or phrase:burn rating
In the following sentence:
"Oxygen and fuel gas cylinders or other flammable materials must be stored separately at a distance of at least 20 feet (6.1 m) or behind a wall 5 feet high (1.5 m) with at least a 1/2-hour burn rating (Figure 2-29)."
the burn rating means the standard to which a wall is built - it will withstand a certain sized fire for 0.5 hours - but how would you say the "1/2 hour burn rating" part in Spanish?