Structural Bolt Tightening: Torque or Tension, which is Correct?

A325 and A490 are high-yield structural bolts used mostly in applications for bridges and steel-framed buildings.

These bolts have specific load/tension requirements per their ASTM specifications. But what about torque?

That’s a question we get quite often here are Maxpro: What is the torque required for the bolts?

This always leads to a discussion with the customer on the difference between required bolt load (tension) and torque (applied force).

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