I don’t have the answer to your question, but when I build my next more permanent sugar shack, I will also have wood floors, but I will pour a concrete pad for the evaporator to sit on, with the concrete pad extending out 3 or 4 feet from the front door of the evaporator to catch any sparks. I then would build the wood floor around the pad. That would be about 20 bags of concrete depending on your evaporator size and thickness of the pad.
2022 - 5 pan block arch - 109 taps, 73 on 3/16 lines, 36 on drops into 5 gallon pails.
930 gallons boiled, 109 L (28.8 gals) of delicious syrup made.
DYI Vacuum Filter
2023 - 170 taps, mostly on lines, 1153 gallons boiled, 130 L (34.34 gals) of delicious syrup made, on a 2x4 divided pan and base stack, 8” pipe, on a block arch that boiled at a rate of 13 gallons per hour.