When I built my sugarhouse I ran out of time. I then built a wooden floor (I have a sawmill) and I laid 8x8x16 concrete blocks to go under the firebox, under the rear legs and a hearth that stuck out about 30" in front. I covered that with 20 ga sheet metal to make sure sparks would not fall between the cracks and set the floor on fire. That worked but it was not good. I didn't get a floor poured until 3 years later. Much better for sure.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.