What is required for equipment operating on rails?

Equipment operating on rails must be equipped with rail clamps and rail stops to ensure safe operation. Rail clamps are essential for securing the equipment to the rails, preventing unintended movement that could arise from vibrations or external forces. This enhances stability and helps maintain alignment, which is crucial for safe handling and transportation.

Rail stops are equally important, as they serve as physical barriers to prevent the equipment from accidentally rolling off the rails. This feature is vital for ensuring the safety of the equipment and personnel working nearby, as it mitigates the risk of accidents associated with derailment.

The other options are not necessary for the basic requirements of equipment operating on rails, as they pertain to different functionalities or are designed for different types of equipment. For instance, while rail switches and indicators are useful for directing movement along multiple tracks, they are not basic necessities for all rail-operated equipment. Similarly, crane covers and tarp systems are focused on protection and environmental considerations rather than fundamental operation. Adjustable wheel bases may be beneficial for some equipment but do not directly pertain to the critical safety features needed for rail operation.