Re: Combination Dial File Cabinet
The used a "hand pallet truck" like this one: http://www.xilin.com/wp-content/uploads/2013/08/DB.jpg
They had two beams with magnets under the safe thick enough for that pallet truck. They lowered it at the final destination and removed the truck. Then they had a pair of thinner beams and a pair of steel rods (maybe 1" diam.). One lifted the safe with a crowbar on one side, while the other exchanged the beam with the smaller beam. Then the same on the other size and then again both sides to go down to the rods. They pushed the safe on the rods a bit better into the corner and lifted again both sides separately to remove the rods. A bit more shifting with the crowbar and the safe was there.
PS: If you want to exchange the lock (which I personally would not do) you will need one with a tapped bolt for a bolt extension.
Martin Hewitt, Investigator Chronicles of Martin Hewitt