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