{HEAD ~ The mattress supporting structure} 1, wherein said {TAIL ~ corner guard} is attached to said base by stapling, such that said guard is deformed when said grid is deflected downwardly 
wherein
{ HEAD ~ The mattress supporting structure } 1 , wherein said { TAIL ~ corner guard } is attached to said base by stapling , such that said guard is deformed when said grid is deflected downwardly
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH