Tieing stone portico to house (2T weight)

[bmj1]

Hi all, 

 

Looking to tie a portico to my house. 

 

Foundations are done for the portico and tied to the house foundations.

 

I guess my only option at this late stage is chemical fixing the stone portico to the brickwork. 

 

How do I calculate the requested frequency and thickness of the fixings? 

 

Thank you in advance

[Mr Punter]

Surely the portico manufacturer has some typical connection details?