What is a requirement for attachments used in hoisting?

Attachments used in hoisting must be approved by the manufacturer to ensure safety and operational effectiveness. This requirement is crucial because manufacturer-approved attachments are designed and tested to meet specific load ratings and compatibility with the hoisting equipment being used. Using attachments that do not have manufacturer approval can result in dangerous situations such as equipment failure, accidents, or injuries due to inadequate load handling capabilities.

Manufacturer approval signifies that the attachments meet the necessary engineering standards and have been evaluated for use with specific hoisting machinery, thus ensuring reliability during operation. It also helps to maintain warranty coverage and compliance with safety regulations. Other options, while they may seem plausible, do not encapsulate the critical safety aspect that stems from manufacturer approval. This emphasizes the importance of using properly rated and tested components as part of a safe hoisting practice.