Y 034309201607258   1        #Y means header
Q     02751VACANT / CLOSE    #comment
G   ....            # inner head
...
...
...                          
T RCRC   0810010
T RDRD   0810010
A 22OP
A 13O 
A 12O 
P 3472CHSK00010014 #P means inner trailer
Z 034309201607258  #Z means trailer