NickyJ

I don't mean to hijack this year old thread, but... rather than start a new one for almost the same scenario in need of advise, I figured I'd ask here. I'm also in Massachusetts and planning on building a shed, also under 200 sq ft. I have a coal forge and plan on making a side draft hood with a 12" flue straight up through the ceiling. I want a dirt floor but New England winters bring frost. I plan on installing concrete footers/sonotubes for 4, maybe 6 points all 4' deep (below the frost line). I also plan on insulating the walls. My question is, how could I reduce the risk and damage from frost heaves inside the shed? I am specifically concerned with frost heaves lifting the coal forge thereby damaging my side draft hood &/or chimney. I'm hoping to start hammering this out in the next few weeks but time is running out since winter is coming so any suggestions are appreciated. Thanks in advance!