Stairs will not directly attach (using the Attach Top/Base command) or join (using the Join geometry command) with wall elements. If you are working with straight stairs, you can use a reference plane aligned with the bottom of the stairs, and attach the stairs to the reference plane. Alternatively, you can directly modify the profile of walls to fit with the stairs.
When looking online for the topic of joining walls to stairs, I found the following pages with additional information:
http://forums.autodesk.com/t5/Autodesk-Revit-Architecture/Can-t-join-stairs-with-walls-and-floors/td...
http://forums.autodesk.com/t5/Autodesk-Revit-Architecture/monolithic-stairs-joining-to-walls-and-sla...
http://www.revitcity.com/forums.php?action=viewthread&thread_id=1420
http://www.revitcity.com/forums.php?action=viewthread&thread_id=1074
thks for the information...
actually i'm build modeling for paint area calculation.....
i need to joint stair with wall because... i need to deduct area from side of wall....
if not ... the area calculation will calculate all the wall surface...
u have any method???
p/s: sorry for my bad english language....
(from malaysia)
You could try editing the profile of the wall to exclude the area of the stairs (from an elevation or section view).
Editing a profile of a curved wall was not an option so I created a "roof" component in place with a blend sweep and was able to attache the wall to this. I'm just learning revit so I'm sure there are even better ways that won't screw with take-offs. I could have hidden this element afteward but decided to turn it into a stone cap.
If anyone wants to know how to do it... This helped me a lot to understand that tip and the Reference Plan function: