{HEAD ~ A first flange} extends perpendicularly from the first side of the upper surface of the longitudinal plate and an end wall extends perpendicularly from each one of two ends of {TAIL ~ the bottom surface} 
{ HEAD ~ A first flange } extends perpendicularly from the first side of the upper surface of the longitudinal plate and an end wall extends perpendicularly from each one of two ends of { TAIL ~ the bottom surface }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL