I'm required to have 30" of clearance between all obstacles by law. I have a waste oil boiler to the left of the bin, which you don't see. The bin shown is the absolute largest footprint it can be and in the only position it can be. Some raking of coal will be necessary.
The floor is laid on top of treated planks, which lay directly on top of the gravel below them. 1920's construction. There is no "give" in the floor whatsoever, regardless of weight.