When installing high-strength structural bolts by the turn-of-nut method, what is the correct sequence?

1. Apply the specified additional nut rotation from a snug-tight condition after the joint is drawn up
2. Tighten each bolt independently to the specified rotation before the plies are even in contact
3. Leave all bolts finger-tight because pretension is not used on highway bridges
4. Heat the bolt red-hot and snug it with a spud wrench only