I have a mass building and I want to trim mass floors

[ayaksize18]

I need to trim the floor parts which are going outside building but theres too many floors and they all have different rotation, how can I trim them easily?

[barthbradley]

I've dealt with this issue before.  Post the File. Lets take a look and see. 

[ayaksize18]

Here

[barthbradley · Accepted solution]

You need to first create a Mass Floor for each Level and then create Floors from the Mass Floors via Floor By Face on the Massing and Site Tab.  

Works fine and dandy, as you can see here: 

[ayaksize18]

Actually, I did the same before but I think I should've update the floors according to surface, it worked when I delete them all and create floors again as u said, thanks