I want to copy a large DB schema to make changes for testing, but do not want any data.

script the database as create to by right clicking the database

https://msdn.microsoft.com/en-us/library/ms178078.aspx

https://msdn.microsoft.com/en-us/library/ms188664.aspx ==>Copy database

Hi Citrus,

you should generate script as follows:

1. Right click on Database, go to Tasks-> Generate Scripts
2. Select your table and click next
3. On next screen, click on "Advanced" button, here you find all configuration to generate scripts with Data, Fks, constraints etc..

OR 

SELECT *
INTO     NewEmptyTable
FROM     YourTable
WHERE    0 = 1 ;