Check out this informative Code Resource Guide for Door Openings by ASSA ABLOY.

 "Doorways are a critical component to any building. They facilitate safe passage in and out—especially in emergency situations—and contribute to the overall health and well-being of the building’s occupants. Building codes are constantly evolving, and the volume of updates and revisions may at times seem daunting. This code resource guide provides you the latest information on current building codes and how they impact the application of total opening solutions."

This PDF guide covers:

Codes and Compliance: Demystifying the Door Opening