{HEAD ~ a truck} having {TAIL ~ a main frame}, said main frame having a right frame channel spaced from and generally parallel to a left frame channel, each said channel having a rearward open end, said channels connected to one another by a plurality of spaced frame cross members including a rearmost frame cross member, said rearmost frame cross member spaced forward away from said rearward open ends, 
having
{ HEAD ~ a truck } having { TAIL ~ a main frame } , said main frame having a right frame channel spaced from and generally parallel to a left frame channel , each said channel having a rearward open end , said channels connected to one another by a plurality of spaced frame cross members including a rearmost frame cross member , said rearmost frame cross member spaced forward away from said rearward open ends ,
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH