Here are the links to A360 for the Autodesk Inventor and STEP format files for the FRC field 2016.
FRC Field 2016
http://a360.co/1Rs6VPs
FRC Field STEP 2016
http://a360.co/1UF7R0t
Autodesk Inventor
1. All the parts are grounded in the main assembly. The game allows for the field to be changed, so remove the grounded status from any structures and then move to a new location adding constraints or grounding as required.
STEP
1. The parts will not be grounded when you open the file. When I open a STEP file I ground the parts to get started.
Please let me know if the download works OK. I have tested it and worked for me.
All the best for 2016.