{HEAD ~ Each L shaped leg} 34 includes {TAIL ~ a transversely extending lip} 38 with a keying arrangement in the form of a plurality of slots 40 formed therein 
includes
{ HEAD ~ Each L shaped leg } 34 includes { TAIL ~ a transversely extending lip } 38 with a keying arrangement in the form of a plurality of slots 40 formed therein
HEAD HEAD 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