Assessing glass surfaces is very complex. For this reason, our boss, Mr. Andreas Mayer—a reputed expert in such assessments—will be personally available to you to provide his expert opinions or free quotations.
As far as standards and guidelines are concerned, the SIA refers to the Swiss and Euro glass standards.
You can find more information about this here:
Swiss Association for Standardization (SNV)
(available in German, English and French)