It is possible to change the Frame and Leaf Thickness property labels to read Frame Width and Leaf Width in the Place Door dialog.
Download the DisplayNames_Architectural.xml file (download from here) and save the file into this location :
C:\ProgramData\Bentley\AECOsimBuildingDesigner V8i Ss5\WorkSpace\Projects\BuildingExamples\BuildingSample_US\support\dataset\datagroupsystem\
Saving the file to this location will allow the new property labels to be seen by anyone working in the BuildingSample_US project. If you wish to see the labels in any project then copy the file into any datagroupsystem folders in a project. The file can be modified in order to change any property labels, though care should be take to follow the format of the file.