This is our 2 x 12' SUPS that the baggage handlers for Singapore Airlines threw onto the roof of the baggage cart (they were too long to fit inside).
The cart was full of all the shortboards for our flight to the Maldives.
We were holding our breath just watching them hoik the boards up there, coz it was only luck that stopped them from sliding off the other side.
Imagine the damage to the rails if they fell from that height?
Thats why the recommendation is:
Put serious thought into how best to protect the rails, nose and tail.