Some useful definitions:
A set of standards established and enforced by local government for the structural safety of buildings. (WordNet Search)
Laws, usually but not always enacted by local government units, that set safety and fire protection standards. These codes affect the materials and methods used in the construction of buildings. For example, a code provision might require sprinkler systems in motel rooms.
(American Banker: Banker's Glossary)
The California Building Standards Commission has a helpful website for navigating this complex publication. It includes links to all 12 parts of the code along with links to supplements and errata.
Part 1: California Building Standards Administrative Code
Part 2: California Buliding Code
Part 2.5: California Residential Building Code
Part 3: California Electrical Code.
Part 4: California Mechanical Code
Part 5: California Plumbing Code
Part 6: California Energy Code
Part 7: California Elevator Safety Construction Code
No longer part of Title 24. See Title 8
Part 8: California Historical Buliding Code Online only, no print edition in Library.
Part 10: California Existing Building Code
Part 11: California Green Building Standards Code (CALGreen Code)
Many local (city and county) codes are based on these codes and the California Building Standards Code (see box below). If you are working on a project in a specific area, be sure to find out what codes apply to that jurisdiction.