Slab foundation for room addition projects.

[capitaldesigns]

I'm working on a room addition project with a slab foundation.

 

After inputting the field measurements into Chief for a room addition project, I would like to lock the existing foundation plan so it does not change when I build
the foundation for the new room addition. Is there way to do this ?

 

When I use the build foundation plan after inputting the new addition floor plan, the existing footings between the existing exterior wall and the new addition are removed.

 

Thanks, Mike