CountryByNet.com Forums :: Project Barn Q3, width and depth of footings

hi!
I am planning a Pole Barn, part of which will be with a heated concrete floor. I will be asking questions to get the consensus expertise. Please stick to the topic, I will be asking several, and could easily miss your pearl of wisdom if you start crossing threads!
thanks!
Project Barn Q3, width and depth of footings
I am in North Texas, i doubt that the freeze line was ever more than 6 inches. Inside the Barn, about 1/2 of the floor space will be unheated compressed gravel, and 1/2 with the heated slab (separated by walls, of course).
Should i put footings on the outside perimeter (where the poles will be)?
If I do not put in a footing, how do I handle the gap between the exterior siding and the dirt?

Indian Paintbrush Prairie Farm
Working toward Carbon-negative self sustaining farm

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