When constructing scaffolds, they need to bear on adequate firm foundations to ensure safety and stability. The suitable options among the provided choices are:
c. Base plates set on mudsills
This option is correct because using base plates set on mudsills provides a stable and secure foundation for the scaffold to rest on. Mud sills are wooden members placed directly on the ground to distribute the weight of the scaffold and prevent it from sinking into the soil. Base plates attached to these mudsills help in evenly distributing the load and ensuring a solid base for the scaffold.
Other options like boxes, barrels, and loose materials piled high enough to achieve level do not offer the same level of stability and safety as base plates set on mudsills. It is crucial to follow proper construction guidelines and standards to prevent accidents and ensure the safety of workers using the scaffold.
