Where can a rigger find all the relative crane component weights?

The correct choice for locating all the relative crane component weights is the manufacturer's specifications. These specifications typically include detailed information about the crane, including the weights of different components such as the boom, counterweights, and other crucial parts. This information is critical for riggers to understand the load characteristics and to ensure safe and effective rigging practices.

Manufacturer's specifications are created by the designers and engineers of the crane and include technical details that are not only specific to the crane model but also comply with safety standards and regulations. Having access to this information is essential for riggers to properly assess the crane’s capabilities and limitations while planning lifts.

While the operator manual may contain important operational guidelines, it generally does not provide comprehensive details about component weights. Construction plans may offer insight into the overall project requirements and layout but are unlikely to list specific weights of crane components. Site safety guidelines focus on maintaining a safe working environment and procedures, rather than detailed technical specifications. Therefore, for accurate and complete information regarding crane component weights, the manufacturer's specifications are the most reliable source.