We use angle irons, and straps unless carrying out of blockleys at telford then we have to net it.
The law is… No load should be secured by it’s own weight.,
and don’t start me off on wheel straps on cartransporters, i could write a book on that subject.
I carry bricks quite a lot my trucvk has very high sides high enough that you would have to climb up to see if I have bricks on board would I have to strap my bricks?.
The only place they are going to go is inside the back of the truck and if I chuck a strap over it it would higher than the bricks.
P.S. Blocks are different I do strap them as half of the top layer comes higher that the sides.