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