Geometry is critical in determining the behavior of thermobimetal.  To put it simply, when cut long and thin, the piece of material curls in one direction; When cut in an equilateral shape, the resulting action is a twist.   This control can be applied to self-assembly systems and useful at micro-scales (too small for human hands or tools), in hard-to-reach situations (inside corners), in inhospital climates (underwater or outerspace), and in cases where skill is absent (disaster relief construction).  These ongoing studies test various shapes, patterns and assembly sequences in hopes to find new, easy and cost-effective methods of construction.