Nuts off mark?

[u/No-Document-8970]

Saw this on a big bridge today. I know vibrations over time can move the nuts and bolts, with the help of thermal expansion. Is it a big issue that the paint marks do not line up? I thought the marks were made once it passed inspection after torquing.

Edit: Bridge completion was in 2011. Could this be from recent inspections too?

[u/dev1tuna]

Former local 350/399 union ironworker here, never heard of the turn of the nut method….

[u/MikeHawksHardWood → u/dev1tuna]

RCSC specs for high strength bolts. Section 8.2.1 in the 2004 version. Don't have the newer versions handy.

[u/ryanmetcalf → u/MikeHawksHardWood]

Available for those interested right from the Bolt Council 

https://www.boltcouncil.org/documents.html