Since the system consisted of small-scale molds, it was possible to incorporate gradual shifts by displacing the units to produce an irregular layout. This offered the possibility of constructing relatively complex bearing walls with articulated surfaces. In the macro-articulated prototype, the actual displacement of each piece was limited by the thickness of the wall (Figs. 2B & 3E). The thicker the wall, the larger the potential displacement. Urethane rubber inserts were used to cast this prototype. An intrinsic characteristic of the system is that the size of the molds and the width of the structure determine the degree of articulation of the wall.