Structural assembly for producing interconnected structures

A structural assembly comprising:

• a plurality of contiguous vertical facets arranged to form a closed perimeter having a vertical recess therethrough, each facet having an inner vertical wall facing said recess, and an outer vertical wall opposite said inner wall;
• interlocking means disposed on each outer wall, said interlocking means being substantially parallel to said recess;
• and
• shoulder means on each inner vertical wall for supporting a shelf member horizontally.

A structural assembly comprising:

• a first member including a first and second pair of vertical side walls arranged substantially parallel and opposed to define an internal cavity, a lateral external surface of each side wall of said first pair having an external vertical groove, and a lateral internal surface of each of said side walls having a shoulder portion protruding into said cavity;
• a second member including at least one vertical tongue member dimensioned to fit into one of said vertical grooves;
• and
• a base element dimensioned to be supportable horizontally in said cavity by at least three of said shoulder portions.

A structural assembly comprising:

• a first member including a first and second pair of substantially parallel and opposed vertical side walls, a lateral external surface of each side wall of said first pair having an external vertical groove, and an upper surface of each side wall of said first pair having a horizontal continuous groove adjacent said vertical groove, and a pair of recesses disposed one to either side of said continuous groove, each of said recesses being at least partially obstructed by a stop member;
• and
• a second member including at least one vertical tongue member dimensioned to fit into one of said vertical grooves;
• and
• wherein the height of said second member exceeds the height of said first member by twice the depth of said continuous groove or of said recess, said second member further including an upper, longitudinally extending side;
• and
• wherein said side walls of said first member each have internal and external surfaces and upper and lower edges connecting said internal and external surfaces, each of said side walls including a shoulder portion disposed in the region of said lower edge on said internal surface for receiving base elements, said side of said second member including a stepped end region, said stepped end region having a height corresponding to the thickness of said shoulder portion in said first member.