The National Fire Protection Association (NFPA) provides free access to its codes and standards via its website and now offers them in formats that have been optimized for tablets and mobile devices.  The free access is available in read-only format and can be a great user resource to become more familiar with a code or check a requirement.

To access NFPA's codes and standards, go to http://www.nfpa.org/codes-and-standards/free-access.