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