Which document is necessary for the safe design of support systems?

A written form of the design from a registered professional engineer is essential for the safe design of support systems because it ensures that the design has been developed and vetted by a qualified individual with the appropriate education and experience. This documentation provides a formal and clear representation of the structural integrity, load requirements, and safety factors necessary for construction. A registered professional engineer is held to specific standards and regulations, meaning their designs adhere to safety codes and guidelines relevant to the industry.

In contrast, other options like emails, handwritten notes, or audio transcripts lack the formal verification and rigor of documentation required for such critical engineering tasks. These may not provide the necessary detail or accountability needed to ensure that the support systems are designed safely and are compliant with industry standards. It is crucial for any structural project to rely on well-documented, professionally certified information to mitigate risks and ensure safety on-site.