Figure 1.2. Flatcar Disassembled.
Figure 1.3. Typical Truck.
bearing and bolster on the truck. Side bearingstwo on each truckprovide
stability for the car during transit, particularly on a curve. The center
plate joins the truck to the underframe, holding the car together and
providing a pivot point for the truck when the car is taking a curve.
b. Underframe. The framework or underframe, shown in figure 1.2, is
the foundation of the flatcar. It receives buffing and pulling stresses and
carries the weight of the deck and lading. Two