Trucking Turner:
… the Bossman has finally agreed that the load restraining bars that clip onto Euroliner side boards would be a good idea.
Hi again Peter,
I’ve checked my earlier post and did a little research, which you might pass to your boss.

Securing freight according to German standards…
It seems that folks who deliver/collect in Germany might not be entirely sure of the German legal requirements for the securing of loads, so to sort the myths from reality, I’ve had a little read of the German equivalent of our Road Traffic Act so that I can offer something definitive and at least inform you of where the goalposts are.
This is a personal translation, so it’s a ‘Google’ free zone. 
The blue writing below is straight from the German Road Traffic Act and NOT from a handbook. 
Straßenverkehrs-Ordnung § 22(1)
(1) Die Ladung einschließlich Geräte zur Ladungssicherung sowie Ladeeinrichtungen sind so zu verstauen und zu sichern, dass sie selbst bei Vollbremsung oder plötzlicher Ausweichbewegung nicht verrutschen, umfallen, hin- und herrollen, herabfallen oder vermeidbaren Lärm erzeugen können. Dabei sind die anerkannten Regeln der Technik zu beachten.
Straßenverkehrs-Ordnung § 22(1)
Road Traffic Act Section 22 para 1
(1) Die Ladung einschließlich Geräte zur Ladungssicherung sowie Ladeeinrichtungen sind so zu verstauen und zu sichern, dass sie selbst bei Vollbremsung oder plötzlicher Ausweichbewegung nicht verrutschen, umfallen, hin- und herrollen, herabfallen oder vermeidbaren Lärm erzeugen können.
The load, including securing devices and equipment, shall be so stowed and secured that they cannot slide, fall over, roll about, fall off or make avoidable noise during full braking or sudden swerving.
Dabei sind die anerkannten Regeln der Technik zu beachten.
In doing so [securing the load] recognised techinical standards shall be observed.
FROM WIKIPEDIA (But still a Google-free zone.
)
Possible outcomes of breaches of StVO § 22:
Those with responsibility under StVO § 22 are: The driver, the vehicle owner and the loader.
The possible penalties are a fine of €50 - €150 and 1-3 driving licence points.
(The German driving licence points system is different to the UK.)
If the load makes “avoidable noise,” the fine is €10.
If a person is injured in a traffic accident and a breach of StVO § 22 is found to have contributed to it, then a prison sentence is also possible.
My own comments:
As you can see, German load securing standards are quite tough. The requirements are set out in the German equivalent of our Road Traffic Act, and brit pete is spot-on about the German Police/BAG’s zero-tolerance attitude towards this subject.
That just leaves us rooting around for the “recognised technical standards.”
These are found in rather wordy scientific documents, one example being VDI-Richtlinien 2700 ff. I’m making no attempt to translate that, because I wouldn’t have a clue what it means even it it were written in English.
(I’m no scientist.
)
Let’s just say that if you can secure your load as per my translation of StVO § 22(1), you’ve nothing to fear. 