What condition could lead to the car "racking"?

"Racking" in an elevator car refers to a misalignment or distortion that occurs when the car is not positioned correctly within the hoistway. This can be caused by several factors, but one significant contributor is the uneven application of safety devices.

When safety devices such as governors or buffers fail to operate uniformly across the elevator system, it can create a scenario where the car experiences uneven forces during operation. This might lead to increased stress on one side of the elevator car, causing it to rack. Proper installation and functioning of these devices are crucial for ensuring even movement and support for the car throughout its travel.

Other conditions, such as door malfunctions or improper track alignment, can lead to related issues but are not the primary causes of racking. Overloading the elevator primarily affects the car's ability to function safely but does not directly result in racking in the same way that uneven safety device application does.