Mike, the steel banding in the image will help but I think is sitll inadequate, the fasteners look thick and in line and the band doesn't extend far enough... but this is all seat of the pants conjecture. My confidence in Trillium far exceeds my capacity to analyze a frame visually from a couple of photographs. I am curious however what it is you feel the metal roof does to alleviate matters? I have tried that argument with engineers claiming snow loads are minimal because the snow slides off. But a little voice in my head knows its all BS, what if in the future the roof is shingled, what about those very heave snows that pile up before the roof warms the underside enough to allow the snow to slide off. After all we frequently claim a metal roof is the preferred way to go because it is a cold roof. Hmmm, actually this is a barn so perhaps it is cold below anyway, low pitch, no heat, snow could pile up...