Application of chocks

When used for cars, the chocks shall always be positioned on the front axle in the driving direction of the vehicle.

Securing and chocking of cars

When chocking cars, the chocks shall always be placed at the unbraked axle. As outlined in the drivetrain overview in section 1.6.2 below, the most critical case is a rear-wheel drive (RWD) vehicle, where both the parking brake and the transmission lock act on the rear axle. This leaves the front axle unbraked, which is where the chocks must be positioned.

For dimensioning cargo securing arrangements, chocks are required for cars stowed athwartships. When correctly placed on the unbraked axle, the chocks ensure that friction is produced at both axles and they increase the efficiency of the lashings in the securing calculations, resulting in a higher securing value.