What is the maximum height at which the tower of a cantilevered materials hoist can free stand above its last tie?

The correct answer pertains to the importance of adhering to manufacturers' specifications when determining the maximum height of a cantilevered materials hoist's tower above its last tie. Each manufacturer of scaffolding and hoisting equipment develops their specifications based on their design, materials, and testing standards. These specifications take into account various factors, such as stability, load capacity, and safe operational practices.

Using the manufacturer's specifications ensures that the hoist is utilized within safe limits, thereby minimizing the risk of malfunction or accidents that could jeopardize worker safety. When a hoist is installed, the integrity of the structure, including how high it can be safely used, must align with the manufacturer's guidelines. This approach allows for reliable performance and prevents liabilities associated with misusing equipment.

The other heights mentioned in the other options may represent standard practices in certain scenarios, but they do not account for specific safety metrics prescribed by the equipment manufacturer and thus should not replace that guidance.