{HEAD ~ The roof} 12 includes {TAIL ~ a metal roof panel} 14 which is connected with longitudinally extending metal structural members or purlins 16 by suitable fasteners 18 
includes
{ HEAD ~ The roof } 12 includes { TAIL ~ a metal roof panel } 14 which is connected with longitudinally extending metal structural members or purlins 16 by suitable fasteners 18
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL 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