Here is a little gift to all my readers. The link below allows you to download a 2012 version RVT project that contains In-place and Component versions of families that are of the Category 'Stairs' and 'Railings'.
Download link

Revit does not allow this to happen out-of-the-box, so you can be sure that this hack is not best practice, and it won't be supported by Autodesk. Use at your own risk!

Having said that, if you know what you are doing, these families could be quite useful to you.

Revit Family Stair Category
RFA Railing Category

Click here to view the entire blog post.