I get the physics of the lateral forces.
But with the U-haul auto transporter, those D-rings will rub the straps if placed straight, then they'll fail for sure.
I won't use the safety chain around the rear, since it's painted.
I'll take my chances.
I know I'm jinxed now, but never had a strap fail....yet.
Ive seen Towing outfits use web straps with D rings. They are commercial HD type and not the junk sold in HF or cheap ratchet straps like shown in the video in this thread ( see post #17)