Frame: Service Precautions

Minimizing Frame Service Description

Frame service can be minimized by lessening the concentration of stress in small areas of the frame.

* Use vehicles only for the purposes for which they were designed.

- Do not overload the vehicle.
- Load the vehicle evenly. Avoid localized loads.
- Do not operate the vehicle on extremely rough terrain at excessive speeds.
- Determine the forces placed on a frame from the operation of equipment when picking a frame for a new vehicle or reinforcing a frame.

* Follow the recommended practices when repairing a frame. Follow the recommended practices when mounting a body or equipment on a frame.

- Avoid sudden changes in the section modulus.
- Do not drill holes in the frame rail flanges.
- Space holes in the web section of a rail at least 13 mm (1/2 inch) apart.
- Use existing holes whenever possible.
- Do not cut holes with a torch.
- Do not overheat the frame rails.
- Avoid welding on the flanges.
- Do not allow 4 or more holes to exist on the same vertical line of the web.