Floor safes offer great protection from fire and theft. Some are designed to be mounted between floor joists, others are placed in the floor before the concrete is poured, permanently encasing the safe in concrete.
Floor Safes are Very Fire Resistant
A fire-resistant safe is a type of safe that is designed to protect its contents from high temperatures or actual fire. Fire resistant safes are usually rated by the amount of time they can withstand the extreme temperatures a fire produces, while not exceeding a set internal temperature, e.g., less than 350 °F (177 °C) over 30 minutes. Models are typically available between half-hour and four-hour durations. An in-floor safe installed in a concrete floor is very resistant to fire.