Creating Standard Work Breakdown Structures by Copying 
You can use an existing standard WBS to create other standard or operative WBSs. The data from this standard WBS is copied into the new standard WBS, where you can overwrite it if you wish. Any subsequent changes to the original will not be copied to the new standard WBS.
Read
Work Breakdown Structure (WBS) for detailed information before creating a standard WBS.You do not have to enter a project profile.
The system displays the Create Standard WBS: Project Definition Basic Data screen. Note that the organizational data cannot be changed. You must first include the structure before you can change this data.
The system displays the Create Standard WBS: Include Standard WBS Element screen. Note that the WBS elements of the standard WBS you copied are displayed.
The Create Standard WBS: Project Definition Basic Data screen is displayed. Note that you can now change the organizational data.