This unusual conversion was very precisely designed and built to be located on the back of a train, that in transit will release and spray weedkiller onto the side of the tracks.
In order for the container to safely fit and be transported on the train, we had to modify the height of the container, from the standard 8ft 6in, down to 7ft 2in. These factors meant the design and build had to be tested and approved, in order to be certified to ISO668.