A coil is round. The container is not.

A coil wants to roll, and every mode of transport gives it a different reason: rough seas, braking, shunting impact. So in the container it is blocked and braced — timber cut, wedged, nailed, new for every trip.

On rail and road, the answer is special equipment: coil trough, special coil wagon, trough truck. Built for one load, in short supply, empty on the way back.

wellDun holds the coil by geometry instead of friction. Modules of heavy-duty corrugated board take it in a form fit and go into the standard container without tools. The container stays what it is. The securing travels with it.

One hour. Per container.

That is how long it takes to brace a coil container with timber: cutting, wedging, nailing, with chop saw and air nailer in a tight space. And the crane waits.

Special equipment returns empty.

Coil troughs and special wagons are built for one load in one direction. On the way back they carry nothing. The trip is paid for all the same.

No one readjusts at sea.

Between plant and port of destination lie weeks, stacking pressure and condensation on the inner wall. What arrives is decided in the minutes spent stowing.

Six shells, a few spacers, fifteen minutes.

At most six quarter shells per container, plus spacers matched to the number and diameter of the coils. The modules arrive ready to use and are placed by hand, without tools and without special skills. Fifteen minutes instead of sixty - demonstrated at the customer, not calculated.

The container is spared as well. The shell is recessed in the middle and directs the load to where the container floor carries it. In the expert inspection, that was exactly the question.

Give us diameter, weight and route. We will calculate your container.

Sea containers, 20 and 40 foot.

Quarter shells, stowed eye-to-the-door, up to 30 tonnes. In live operation since summer 2024.

Rail: m² wagon, MOBILER.

Half shells for eye-to-the-door and eye-to-the-side. The container changes mode of transport, the load stays secured. It is the container that is transhipped, not the coil.

Road: semi-trailer.

Half shells, plus one strap. Instead of waiting for scarce special equipment, the coil travels on the trailer that is already there.

Coils out, scrap back.

With wellDun, a coil may travel in a scrap container. Braced with timber, that is not permitted. So the same container travels loaded in both directions instead of full one way and empty the other.

Where a return trip does not pay off, there is a second product line: lighter in design, up to 16 tonnes, for by far the largest share of all coils. It replaces timber dunnage too and goes into paper recycling at the destination.

Tell us what you load.

Coil diameter, weight, container, route. From this we design the system, provide the proof for your route and support the first loading at the plant. What runs after that runs without us.

Martin Promberger
Managing Director wellDun GmbH
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