To make the load immobile, you must
use blocks, cleats, and wire or
cable to counteract the stress and
strain that the motion of the
flatcar imposes. The forces
exerted on a load during transport
are longitudinal, transverse, and
vertical. In figure 2.4, a 2 1/2
ton cargo truck is shown blocked
and braced on a flatcar to lessen
the effect of these forces.
Letters B through G in the figure
refer to devices used in securing
Figure 2.3. Spanners.
the truck and are discussed in connection with longitudinal, transverse, or
vertical forces in the subparagraphs that follow. The letter A refers to
brake wheel clearance which, as you know, must be at least 12 inches between
the end of the car and the load.
Figure 2.4. Blocked and Braced 2 1/2Ton Truck.
a. Longitudinal force. When a flatcar comes to a sudden stop, the
loadin this example, the 2 1/2ton cargo trucktends to