Building unit with mating sides

A building unit comprising:

• an upper surface;
• a lower surface;
• and
• a plurality of side surfaces at least partially extending between the upper surface and the lower surface defining a generally trapezoidal shape in plan view,
• wherein a first pair of said side surfaces, located on opposite sides of said building unit extend generally obliquely with respect to each other when considered in plan view, each of the first pair of side surfaces having an S-shaped section that are images of one another, such that each of said first pair of side surfaces are configured and arranged to interlock with either of the first pair of side surfaces of another like building unit;
• a second pair of side surfaces, located on opposite sides of said building unit, wherein each of said second pair of side surfaces extends between the side surfaces of said first pair of side surfaces, and wherein one of the second pair of side surfaces is longer than the other;
• wherein each of the second pair of side surfaces includes a first sub-side surface and a second sub-side surface, and further wherein said first sub-side surface of the longer of said second pair of side surfaces is a mirror image of the first sub-side surface of the other, shorter of said second pair of side surfaces, such that the first sub-side surface of the longer side surface of one building unit is configured and arranged to mate and interlock with the first sub-side surface of the shorter side surface of another like building unit;
• and
• wherein a longer one of the first pair of side surfaces is oblique to the second pair of side surfaces.

A structure comprising:

• a plurality of building units arranged adjacent to each other, wherein each of said building units comprises:
• an upper surface;
• a lower surface;
• and
• four side surfaces at least partially extending between the upper surface and the lower surface,
• wherein said four side surfaces includes a first pair of said side surfaces, located on opposite sides of said building unit and defined as a first side surface and a third side surface, and a second pair of said side surfaces, located on opposite sides of said building unit and defined as a second side surface and a fourth side surface,
• wherein said four side surfaces of each building unit define a generally trapezoidal shape when considered in plan view, wherein each of said four side surfaces is non-linear and has a plurality of segments, wherein said first pair of side surfaces extend generally obliquely from each other and said second pair of side surfaces extend generally parallel to each other, wherein said second pair of said side surfaces have different lengths, herein said first and third side surfaces each include an S-shaped section, and wherein said first and third side surfaces each have a midpoint bisecting each side surface such that each side surface comprises two portions, said portions on each side of said midpoint being a 180 degree rotational image of said other portion about said midpoint,
• and
• wherein said plurality of building units are arranged in a course in which adjacent building units are positioned with the first side surface of one building either mating with the first side surface of an adjacent building unit, or with the first side surface of one building unit mating with the third side surface of an adjacent building unit.

A structure comprising:

• a plurality of building units arranged adjacent to each other, wherein each of said building units comprises:
• an upper surface;
• a lower surface;
• and
• a plurality of side surfaces at least partially extending between the upper surface and the lower surface defining a generally trapezoidal shape in plan view,
• wherein the plurality of said side surfaces includes a first pair of said side surfaces, located on opposite sides of said building unit and defined as a first side surface and a third side surface, and a second pair of said side surfaces, located on opposite sides of said building unit and defined as a second side surface and a fourth side surface,
• wherein the first side surface and the third side surface are non-linear and extend generally obliquely with respect to each other, when considered in plan view, and further wherein the first and third side surfaces each include an S-shaped section, the S-shaped sections of the first and third side surfaces being images of one another,
• wherein the third side surface is oblique to the second and fourth side surfaces, and wherein said plurality of building units are arranged in a pattern in which adjacent building units such that:
• the first side surface of one building unit mates with the first side surface of an adjacent building unit,
• the second side surface of one building unit mates with portions of the second and fourth side surfaces of two adjacent building units,
• the third side surface of one building unit mates with the third side surface of an adjacent building unit, and
• the fourth side surface of one building unit mates with portions of the second and fourth side surfaces of two adjacent building units.