The combination 2 in which {TAIL ~ the central portion} of each tongue is substantially parallel to {HEAD ~ the web} of the associated cross beam 
The combination 2 in which { TAIL ~ the central portion } of each tongue is substantially parallel to { HEAD ~ the web } of the associated cross beam
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH