How should jacks be stored when not in use?

Storing jacks properly is crucial for maintaining their functionality and longevity. Keeping jacks in a dry place away from direct sunlight and corrosive materials is essential because moisture can cause rusting or deterioration of metal components, while sunlight can degrade rubber or plastic parts. Additionally, corrosive materials can lead to chemical reactions that may weaken the jack over time. Proper storage conditions ensure that the jack remains in good working order and is ready for use when needed.

The other options suggest environments that could negatively impact the jacks, such as humid environments that promote corrosion, crowded areas that could lead to damage when moving equipment, and wet surfaces that can create instability or cause rust. By avoiding these scenarios, you preserve the integrity and reliability of the jacks for future use.