What is required to prevent movement in a mobile scaffold fitted with castor wheels?

To ensure that a mobile scaffold remains secure and does not move unintentionally, wheel locks or chocks are essential. When the scaffold is positioned and ready for work, activating the wheel locks or placing chocks under the wheels allows for stabilization, effectively preventing the scaffold from rolling or shifting. This is crucial for maintaining a safe working environment, as any unexpected movement can lead to accidents or injuries.

In regards to other methods, while weighted bases, stabilizing straps, and additional outriggers are all techniques that can enhance the stability of scaffolding systems, they are not specifically necessary for preventing movement in mobile scaffolds equipped with castor wheels. Weighted bases may not be suitable for mobile applications, stabilizing straps are not always applicable to the design of mobile scaffolds, and additional outriggers add complexity and may not be standard in mobile scaffold configurations. Therefore, relying on wheel locks or chocks is the most direct and effective way to secure a mobile scaffold fitted with castor wheels.