What Can Go Wrong With Weld Root Examination in Machinery Base Plates-

https://welding-inspection-notes.northstarcolumn.com/posts/ultrasonic-weld-testing-for-bridge-steelwork-common-pitfalls-and-fixes

What Can Go Wrong With Weld Root Examination in Machinery Base Plates? Machine bases use thick plates and support ribs to hold alignment. The weld root is a key area because access and fusion conditions can be difficult there