What should not be used as man trips?

Bottom drop cars should not be used as man trips because they are primarily designed for transporting materials rather than personnel. Man trips are responsible for safely transporting workers to various locations within a mining operation, and the vehicles used for this purpose must be equipped with safety features and appropriate design to ensure the well-being of passengers.

In contrast, bottom drop cars are intended for efficiently hauling materials like ore or coal. They are designed to release their contents quickly at designated points, which is not compatible with the needs of transporting workers safely. Therefore, utilizing bottom drop cars as man trips could pose significant safety risks.

On the other hand, mine cars, engineers' vehicles, and passenger cars are all types of transportation specifically used within mining environments to take personnel safely to their designated work areas. They are designed with safety and comfort in mind, making them appropriate selections for man trips.