I went through the monotonous process here: How to combine data
I really wish this was built into the LB analysis functions. Everything else is so easy to grab zones, etc., but for the whole building (read: DF) it is a real pain. Can this be on the wish list please? Also please still respond with better ways to extract the load profiles per structure. The above link is ridiculous - and it is also completely wrong if you are using floor multipliers (BE CAREFUL!).