Should you not be using the Mexican building code?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
I found this some years ago. I cannot vouch for it. It looks like a US government agency that made this and it is old. Maybe this will give you a lead to find a more updated document. Good luck.
The document that @weab linked to is a UFC design guide, produced by USACE. It is a guide for military design usage around the world. There is a much newer version of this document, and it can be downloaded freely from the USACE website. However, you will notice that there are no values shown for Mexico proper, since the US Armed Forces have no bases located in Mexico.
Dave
