| 280 / | HD | LAND VEHICLES |
| 29 | DF | WHEELED {21} |
| 80.1 | DF | .~ Running gear {20} |
| 124.1 | DF | .~.~ Suspension arrangement {11} |
| 124.11 | DF | .~.~.~ Pivotally mounted axle or axle assembly {3} |
| 124.117 | DF | .~.~.~.~ Vertical pivot axis (i.e., swinging axle) {3} |
| 124.121 | ![]() | .~.~.~.~.~ Resilient connection detail {3} |
| 124.122 | DF | .~.~.~.~.~.~> Offset pivot |
| 124.123 | DF | .~.~.~.~.~.~> Telescopic members |
| 124.124 | DF | .~.~.~.~.~.~> Fifth wheel supported upon transverse leaf spring |