This might be more for future games, but I think it would be very cool and also would expand the gameplay. It is bridge building like in bridge builder games. I bet most of us have played some version of it. So yeah, you would have to bring the materials like it is now, but after that you would have to build the bridge yourself (could be optional) and then it would be up to you to build the bridge that will hold all the loads and you would know what kind of bridge you built and if it is worth risking with very large load. I understand that this would be a huge task to implement, but that would be something very unique.