Fire Proofing

I Would Like To Buy A Medium Size Fireproof Floor Safe (like Those At Office Depot), But All I Have Available To Place It On Is A Carpeted Concrete Slab. My Fear Is That If It Is Not Firmly Secured, Someone With A Hand Dolly Could Remove It In Minutes.

Is There A Way To Secure A Safe To A Concrete Floor Or To Wood Studs On The Wall Where It Sits So It Can't Be Easily Removed?