How long can a bank vault stay fire proof?

A bank vault's fireproof capabilities can vary based on its construction materials and design, but most vaults are engineered to withstand high temperatures for several hours, typically ranging from 1 to 4 hours. This is achieved through the use of fire-resistant materials, insulation, and advanced locking mechanisms. However, prolonged exposure to extreme heat beyond its rated duration can compromise the integrity of the vault. Regular assessments and upgrades are essential to maintain its fireproof effectiveness over time.