The new HDL 400 SA with a bearing load of 400 kg and a working width of only 155 mm makes it possible to transport several light window parts in combination. With an additional guide rod e.g. a grab pole with a protective handle, window parts can be pushed or pulled over kerb sides. This rod can also be used for safe placement. In addition to this, each wagon is equipped with a protective covering and a handle for one-man operation after the work has been completed!