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