Hi Ken;
To me an Alaskan slab is a poured concrete slab with thickened edges. This "monolithic pour" is the entire foundation and does not need footings underneath. We use these slabs some here in the frozen north so I am sure they would be even more reliable there the ground does not freeze four feet deep as long as the soil is stable. High quality anchors embedded in the concrete are important to keep the frame tied down. Your local building code enforcement officer may be friendly and would answer detailed questions.
Good luck;
Jim
