Mark,
As an ex driver of many years, who started with rope and sheet and can remember the days when things went astray, chasing my sheet down the yard in a gale, while the 'old boys' sat in their cabs and watched you over the top of their paper while a mug of tea sat next to them. I really enjoyed looking at your diorama, and that would be how trucks would be parked up next to each other. Especilly like the crowd of 'old women' next to the Pollock tanker, you have that to a 'T'. Drivers the world over will always stand around and put the world to rights, philosophers and politicians all...
If I could 'nit pick' it would be the Pollock flat bed. On your next flat bed make sure the sheets overlap from front to back. The reason for this was that when going down the road the wind gets under the sheets and blows them up like balloons. So by putting the back sheet on first and then the front one overlapping the back one, the wind flows over the top, and the boss will be pleased with your fuel consumption. And the Beasley with the barrels, I could not see the barrels clearly but the back two would have the rope looped around them. This would act as a wedge and stop the others from moving back and forward. I hope this helps you out with your next project which I would love to see, and I can just smell the cabbage cookings before spending a night, on a board across the seats and using the night out money for a couple of pints.
Well thought out and a pleasure to look at, a big well done to you. What next....
Cheers,
Mike.