I was looking for a heavily wind loaded area that had a slab sitting above the facetd snow. The area I dug in was 188cm ( 74in) deep with 13cm of new snow sitting above two distinct wind slabs. (The depth of this snow is not the norm out there right now. I would say twenty feet awat the snow was more like 70-90cm deep.) The top wind slab was chocolate colored and the bottom slab was cleaner snow. There was no distinguishable weak layer between the two slabs. The 1f hardness wind slab was sitting above small fist hardness facets. It took a lot of strength for the wind slab to fracture on the facets but when it did fracture it was a clean shear. I did not do an extended column test and would expect that it would fracture and propagate.