What two details does a contractor need before installing support structures?

In the context of installing support structures, having design calculations is crucial for a contractor. Design calculations provide the necessary engineering analysis to ensure that the support structures can handle the expected loads, environmental conditions, and any other stresses they might encounter during their service life. These calculations ensure that the structures meet safety standards and relevant codes, which is a fundamental requirement in construction projects to maintain integrity and safety.

While shop drawings can provide specific details on how to fabricate and install components, they are primarily derived from the design calculations and intended to show how the components fit together. The construction schedule is important for project management but does not directly influence the engineering aspects of support structure installation. Inspector's contact information is useful for communication and oversight but is not a prerequisite for commencing structural work. Therefore, design calculations are paramount in providing the framework for safeguarding the structural integrity during installation.