1. Codes and standards governing smoke and heat vents: "Standards Mandate the Use of Smoke and Heat Vents" lists the various standards, and their sources, used for smoke and heat vents in the US. The article is from 2010 and is available on the website of the American Architectural Manufacturers Association.
3. Technical: See this product data page for the technical characteristics of "melt-out" smoke vents at the Plasteco website (click on a specific model for more details). This is only an example and other products and brands may be different.