Open Gates?

Do the gate doodads actually open up or do they just exist for demolishing.

And if they did open up, what would be the trigger to get them to open?

Thanks.

event:an unit enters region
action Destructible: open gate

Thanks man. I appreciate the help.

on this site it is normal to give positive rep if you helped somebody:\

It's still bad form to expect reputation.

I don't expect people to want to help me out though and I will always give a thanks to the development community. So again, Sandro, thanks for the help.