Revit Arch 2010 Structural Slab Span Symbol

The Revit Architecture 2010 Help files describe how a Structural Slab can be added along with a Span Direction Symbol. Autodesk has confirmed that this is an error in both the Help file and Structural Slab tool. Some Revit Structure files got into the Revit Arch Help files. They said that this will be addressed in the 2011 version. Although they didn't elaborate they will probably remove the reference out of the help files and removing the Structural Slab tool altogether from RAC.