In that case, if the playership collides with the bridge, it should get destroyed, shouldn’t it?
Otherwise, the ‘correct’ behaviour (in respect to the real world) would be that the spaceship, which is ‘less powerful’ than the bridge, gets moved along the outer side of the bridge collider. If the bridge was ‘less powerful’, the spaceship would push the bridge away.
If you have another solution in mind for this case, please let me know. 
See also:
- Forum User Guides : How to mark a topic as solved