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