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