Which block type is specifically designed to be movable?

The spot block is specifically designed to be movable, which makes it ideal for various applications in theatre rigging where mobility and flexibility are required. Spot blocks can be utilized in systems that require quick adjustments or changes in the position of the rigging. They often have a lightweight design, allowing for easy relocation along the rigging path, which is crucial when making necessary modifications during rehearsals or performances.

Movable blocks, like the spot block, help create dynamic rigging configurations, which can enhance the versatility of stage setups. This utility is important in a live performance environment where scenes may change frequently, and rigging systems must adapt accordingly.

In contrast, other types of blocks mentioned serve different purposes that focus on stability or specialized functions rather than mobility. They are typically used in fixed positions or for specific tasks, making them less suited for applications demanding frequent movement.