After setting of the resin the bolt is rotated in {TAIL ~ a second sense} so that the bolt penetrates into the anchor to tension {HEAD ~ the bolt} 
After setting of the resin the bolt is rotated in { TAIL ~ a second sense } so that the bolt penetrates into the anchor to tension { HEAD ~ the bolt }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD