Which of the following can contribute to forklift overturns?

Excessive load height is a significant factor that can contribute to forklift overturns due to its impact on the center of gravity. When a forklift carries a load that is too high, it raises the center of gravity, making the vehicle more unstable. This instability can lead to tipping, especially during maneuvering, turning, or when the forklift is on uneven surfaces. Safe operational practices dictate that loads should be kept as low as possible while being transported to ensure stability. Keeping the load low minimizes the risk of the forklift becoming top-heavy and reduces the likelihood of overturns.

On the other hand, proper tire pressure, regular maintenance checks, and operating in a straight line are all factors that can enhance the stability and safe operation of a forklift. Proper tire pressure helps maintain traction and balance, while regular maintenance checks ensure that all components are functioning correctly, contributing to safer operation. Operating in a straight line generally reduces the chances of tipping compared to making sharp turns; hence, these practices do not contribute to overturns, but rather help prevent them.