Setting setfacl

Looking for guidance on setting setfacl

I need to setfacl on a directory so that any file that is created within that directory (including sub-directories) gets rw permissions for the secondary group "coggroup".

Ex:
directory name : targetdir
permissions on targetdir: drwxrws---. 11 root coggroup
umask: 0022

I need to have any file created in targetdir/ to automatically gain permission rw for for coggroup, including sub-folders

Any help would be appreciated.

Thanks.