N Scale Tank Car loading Bridge 4x Down

4 access bridges with safety cages for accessing the tops of tank cars from a platform. These bridges are in the down-position to appear to be in the loading process when a tank car is spotted below the bridge.
These are designed for the platforms found in my Loading/Unloading section. They can be mounted on other structures as well, as long as the walkway is 30mm above the track.

Please note: in this position the bridge are inside the clearance profile, and it is not safe to run trains under the bridges without risking damage to the bridge, platform or train. If you would like to run trains and park them below the bridges please have a look at the bridges in the "medium" position. 
Keep in mind that not all tank cars are the same, so the bridge might not fit all cars in this "down" position.