{HEAD ~ longitudinally oriented non metallic stringers} having a lower flange joined to {TAIL ~ the skins} and an upper flange joined to an upper part of the frame members 
joined to
{ HEAD ~ longitudinally oriented non metallic stringers } having a lower flange joined to { TAIL ~ the skins } and an upper flange joined to an upper part of the frame members
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH