Before attaching a hoist to a structure, it is important to ensure that the structure is ___.

Before attaching a hoist to a structure, it is crucial to ensure that the structure is strong enough to support the load and the dynamic forces exerted during operation. This is because hoists are designed to lift heavy objects, and if the structure cannot bear the weight, it could lead to catastrophic failure, including potential collapse or damage. The structural integrity must be assessed to prevent safety hazards for those working around the hoist and to maintain the overall stability of the construction site.

While the other options might have some relevance to various aspects of construction, they do not specifically address the fundamental requirement of load-bearing capacity necessary for a hoist. This makes the importance of strength paramount in the context of safely using hoisting equipment.