METAL BODY REPAIR - OD1653 - LESSON 1/TASK 1
bus frames are made flat without any drop, since a flat floor for the cargo
or passenger carrying space is highly desirable. A low center of gravity is
not as important a consideration for commercial vehicles as it is with
(8) Separate parts of automobile and truck frames are riveted together.
Rivets are used because of their structural strength and their ability to
give with the road condition. Before attempting to repair any frame, it is
important to make an inspection to determine what, if any, damage or frame
misalignment exists. Frame members often lose part of their original
strength during the straightening process as a result of heating or
excessive working to bring the parts back into alignment. It is possible
that some frames have inherent weaknesses. Truck operations may result in
shock loads which the manufacturer has not anticipated.
FIGURE 4. FRAME (CARGO, SHOP VAN, TANKER).