I've been assembling pieces of a future forge in a 14' x 22' shed that at present has a gravel floor. This week presents the opportunity to get a couple yards of fresh concrete at no cost, so I am thinking of pouring a foundation block for one or two hammers. One is a 70 lb Kinyon air hammer, with a base about 20" x 40". The other I don't know, maybe larger or smaller.
So what is a useful size block to pour? How close to the walls and in what orientation to have useful clearance while not wasting space?
I was thinking of two blocks about 40" square by 18" thick, buried so the top is about 3" below floor level. The hammers would sit on 4x6's to raise the base to grade and provide some shock isolation. Burying the blocks would also avoid interfering with a future slab or other use of the area. I was figuring the forge floor would stay gravel. It's already a cat hangout so a dirt floor is not a great choice.
thanks
Bob