The lock assembly selectively cooperates with {HEAD ~ the ground member} to secure the clamp body and {TAIL ~ structure} engaged therewith relative to the ground member 
The lock assembly selectively cooperates with { HEAD ~ the ground member } to secure the clamp body and { TAIL ~ structure } engaged therewith relative to the ground member
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH