Irregular trapezoidal building unit and wall structure including same

A partial structure comprising:

• a plurality of irregular trapezoidal structural units arranged side to side along a line to form at least a first course, each structural unit comprising:
• an upper surface and a lower surface, the lower surface being opposed to the upper surface;
• a front face and an opposed rear face disposed between the upper surface and the lower surface, the front face being longer than the rear face;
• a first side face and an opposed second side face disposed between the upper surface and the lower surface, wherein both the first side face and the second side face generally extend from the front face to the rear face;
• wherein the first side face and the second side face include a general S-shape section;
• wherein the structural units are arranged such that the S-shape sections of adjacent units mate and interlock.

A partial wall structure comprising:

• a plurality of irregular trapezoidal structural wall units arranged side to side along a line to form at least a first course, each structural wall unit comprising:
• an upper surface and a lower surface, the lower surface being opposed to the upper surface;
• a front face and an opposed rear face disposed between the upper surface and the lower surface, the front face being longer than the rear face;
• a first side face and an opposed second side face disposed between the upper surface and the lower surface, wherein both the first side face and the second side face generally extend from the front face to the rear face;
• wherein the first side face and the second side face include a general S-shape sections that are translated images of one another;
• wherein the S-shape sections on the sides of adjacent structural wall units mate and interlock with each other;
• and
• wherein the front face and the rear faces each unit include general S-shape sections and that are translated images of each other.