glass99
again, late... Been much too busy to check the site lately.
The Canadian code really has almost nothing - for the matter of deflection, it does defer the matter to judgement. Our entire code for use of glass in structures is about 20 pages, including figures, as well as covering content in both English and French, written in the 80's before FEA was a thing. I hardly pick it up; it has a couple nice tidbits about tolerance ranges for fabrication sizes (I'll analyze a 6mm sheet at a size of 5.56mm).
If I need to look at holes, I reference American; glass fin walls, i reference Australian, etc. I could forward you some of the Canadian stuff if you would like. L/30 is pretty reasonable in a lot of situations. Usually I'll shoot for less than 1" as my own rule. Handrails are usually where deflection can be a pain.
I'm not sure if there is a PM feature in this site but I wouldn't mind getting in touch via email to discuss technical topics more in depth without loss of anonymity. let me know... take a look at my last post in the finite element forum, I'm having some troubles these days.