Hi All,

I'm writing a PQR for AWS D9.1, 2006.  One of the variables under Visual Inspection is the Effective Throat. 

The code describes the variable as, "the minimum effective throat shall be as specified for the application with maximum convexity not to exceed 1/8 inch."

I looked up Effective Throat in AWS A3.0.  The figure describes the Actual Throat, Effective Throat, and Leg and Size.  Is there a formula to determine the actual value of the Effective Throat?

I'm welding a 0.88 x 0.22t boss to a 2"x .065t tube.  The minimum weld size is 0.061.  Normally I would just scribe lines on the cross section specimen and measure the Effective Throat with calipers. 

But, since reading this Forum, I'm wondering if this is the best way to answer the question.

Thank You,

Keith