{HEAD ~ A column structure} in accordance 7 wherein the polygonal perimeter of the column is {TAIL ~ a regular equiangular and equilateral polygon} 
{ HEAD ~ A column structure } in accordance 7 wherein the polygonal perimeter of the column is { TAIL ~ a regular equiangular and equilateral polygon }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL