A predetermined number of pilot holes 164 may be drilled into {TAIL ~ the side edge} 48 of the inactive door 24 at {HEAD ~ several predetermined locations} 
A predetermined number of pilot holes 164 may be drilled into { TAIL ~ the side edge } 48 of the inactive door 24 at { HEAD ~ several predetermined locations }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD