What are the rules or code for stair risers both indoor and outdoor.
Specifically, this home has stairs going to the second floor with open risers, obviousally a safety concern. There are aslo similar stairs to the basement and the basement is semi-finished.
Input please.
Thanks.
I believe the maximum allowable opening between risers is 4".
An excellent document that I have stored at About Homes:
[Visual interpretation of the 2006 IRC stair building code.](http://www.abouthomes.info/files/0311 9734.pdf)
See photo 17.
My memory is not so bad after all 
In every report I identify any discrepancies in accordance with current stair construction standards as I do not know the dynamics of the family going to live in the house.
The only stair system that should be rebuilt to standard is new construction. I have had this done several times (one time myself and the selling agent fell down the stairs during inspection). Make a note of any deficient season and indicate in my report that remanufacturing/upgrade is not the responsibility of the seller and if this is a concern , they should consider buying another house.
Does anyone know the minimum distance required by code at the top of a flight of stairs just inside an exterior door? I.E. floor space at the top.
Aulden
36" minimum landing or floor on both sides of the door.
On both sides or total? I thought it was total. As in a hallway.