Here is a very easy to understand visual guide to the code issues (newer IRC) of building a stair. (This is a 16 page PDF, it will take a bit to load).
http://www.stairways.org/pdf/2003%20Stair%20IRC%20SCREEN.pdf
For: John Raabe,
Many thanks for posting the Stair building booklet. Incredibly helpful!
Dave Urry
Gulgong NSW, Australia.
Say hello to our mate, Jonesy down there, Dave. :)
For the young at heart...Or just plain lazy!
(http://i1.tinypic.com/o92yhx.jpg)
2006 Update
http://www.stairways.org/Resources/Documents/2006%20Stair%20IRC%20SCREEN%20web%20download.pdf