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Measurement of the root gap in a Butt-Joint weld 

Root gap - the minimum distance between the ends of the elements to be welded which is measured during the assembly of the butt joint for welding



  • Lower the fillet arm 2 or the taper gauge 5 into the groove until they come into contact with the ends of the elements to be welded . 
  • Take the value of the parameter b on the appropriate scale.