b. Lower cargo floor and vehicle height.
trucks, the frames are simple, rugged, and of channel
iron construction. The side rails usually are parallel to
each other at standardized SAE widths to permit the
c. Protection from mud and water required for
mounting of stock transmissions, transfer assemblies,
drive-line components on amphibious vehicles.
rear axles, and similar components. Trucks that are to be
d. Reduction in the amount of vibration present
used as prime movers have an additional reinforcement
of the side rails and rear crossmembers to compensate
in the vehicle structure.
for the added towing stresses.
e. Increases in the amount of noise transmitted
into the crew and passenger compartments.
35-4. Brackets and Hangers. Frame members serve as
supports to which springs, independent suspensions,
f. Difficulties encountered when different body types are
radiators, or transmissions may be attached. Additional
mounted on a basic chassis.
brackets, out-riggers, engine supports, and horns are
added for the mounting of running boards, longitudinal
springs, bumpers, engines, towing hooks, shock
35-3. Truck Frame (Ladder). Trucks of up to 1-ton
absorbers, gas tanks, and spare tires.
capacity have frames whose rear sections resemble a
ladder. This type of frame (fig. 35-3) allows for different
types of truck beds or enclosures to be attached to the
frame. For larger
Figure 35-3. Truck Frame (Ladder).