Final answer:
Consult safety regulations, manufacturer's guidelines, and engineering principles for the selection and placement of cranes and derricks to ensure safe operation and efficiency.
Step-by-step explanation:
For the selection and placement of cranes and derricks, it's important to consult various sources, including safety regulations, manufacturer's guidelines, and engineering principles. Safety regulations such as those outlined by OSHA (Occupational Safety and Health Administration) provide legal requirements that ensure the safe operation and placement of lifting equipment. Manufacturer's guidelines are crucial because they contain specific instructions on how to properly assemble and operate the crane or derrick, considering factors like load capacity and environmental conditions.
Engineering principles are also vital for determining the appropriate crane or derrick for a construction project. Engineers will consider the load to be lifted, reach required, ground conditions, space constraints, and proximity to power lines or other hazards. This comprehensive approach ensures that the crane or derrick selected is both suitable for the tasks at hand and can be placed in a manner that maximizes safety and efficiency.