A hook is slidably mounted on {TAIL ~ the frame} to engage a slat fixed to {HEAD ~ the floor} adjacent a wall edge 
A hook is slidably mounted on { TAIL ~ the frame } to engage a slat fixed to { HEAD ~ the floor } adjacent a wall edge
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH