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