AWS D1.1 plug and slot welds

[WeldUK]

I have found information in AWS D1.1 (various paragraphs, see 'plug welds' in the index) that defines hole sizes, shapes and spacing as well as weld size but I do not know the background.

Can anyone help?

 

[holdpt]

Could you be more specific with your question?

 

[WeldUK]

I wish, but I have been asked an even more generic one. I will investigate further. Thanks