Class 3 Vault: The Two-Hour Attack Standard That Protects Your Gold

A Class 3 vault must withstand more than two continuous hours of sustained attack by professional burglars using power tools and cutting torches. It is the highest commercial vault rating under UL Standard 608 — and a mandatory condition of NYMEX/COMEX licensure, not a marketing claim. Here is exactly what that standard requires, and what it means for the gold you store.
