What might cause this many cracks?

[klott]

Glad to be of service. BTW Bobby, please warn the owners about the dangers of the gas in the auto's tanks, or gas cans expanding from the heat, causing an explosion! Some will say it is O.K. if the stove is 18" above the floor, but I say Bull!...the stove will draft and pull the fumes right into the firebox, even if it gets it's combustion air from outside, the box still has to be loaded. Not a wise place to have a wood stove. IMHO