Weld symbol question - PMB

[KimBellingrath]

I am looking at a drawing that calls for a RSEW (resistance seam weld) and above the symbol in the 'size/strength' area it has 'PMB'. What does that mean?

 

[unclesyd]

i don't have that particular set of letters. The letter used on welding symbols are called out in AWS 2.4-79.71.

If we used an unusual call we usually spelled it out in the notes.

Good luck