Dear Matthew/Huang/Chuan,
As my understanding, there is no friction bolt to be used in OG3, only shear bolts (non-friction).
Chuan/Huang, please comfirm this to client.
Matthew,
As my understanding to item 8.3 from the Chinese translation revision EN 1090 , the requirements to non-friction bolt tightening can be explained as following:
1) step 1, tighten the bolt to "snug-tight" condition;
2) step 2, preload the bolt till the bolt shall protrude from the face of the nut after tightening not less than one full thread pitch.
Maybe my understanding is wrong?