[MrForbes]

When it's on the bridge, it's in a transitory state...but when it is lifting up and is not yet on the bridge, it might be violating the rule?

We don't know if ours works yet, we have to put some weight on the bridge and try it. Or at least draw a Free Body Diagram, so we can figure out if it should work. It's just an arm that pops down in front of the robot at an angle, and we drive the robot into the bridge, and hopefully push the end of the bridge down as we move forward. It's pneumatically actuated.