The title kind of says it all.
I'm in the process of updating our title blocks to give them a slightly larger binding strip due to complaints from PAs and PMs that on half size sets the binding strip covers up some of the drawing area.
Currently we use a standard of 1 1/2" for the binding strip.
Question
Is there any industry standard for dimension of the binding strip that we should be using?

I looked at a piece of standard binding and where the creases are it would appear to be 1" of cover. So I think I'm going to use 2" so at half size, I still have an inch.
Any advice would be helpful.
Thanks.