b. Army Shipping Documents. Prepare all Army shipping documents accompanying freight in accordance
with AR 725-5.
c. Securing SemitraiIers on TTX or "Piqgy-Back" Railroad Cards for Transportation. The semitrailers are
all secured on TTX or "Piggy-Back" railroad cars as shown in figs. 6-1 and 6-2. There are only three points
of attachment. The kingpin of semitrailer is secured to a metal stand, which is a part of the railroad car
(fig. 6-1). Chassis are furnished with the railroad car and are secured
to the main frame
of the semitrailer
the rear portion (fig. 6-2) to prevent shifting of the rear of semitrailer. These chains are attached to the
sides of the railroad cars.
Figure 6-1. Semitrailer M128A1 loaded
on TTX railroad car for shipment - right front view