Which of the following must be included in the construction documents for structural concrete construction?

In structural concrete construction, it is crucial to include all relevant details in the construction documents to ensure safety, compliance, and structural integrity. This includes a specified strength or grade of reinforcement, which is essential for determining the load-bearing capacity and durability of the concrete structure. The specified strength guides the selection of materials and informs inspection and testing processes.

Additionally, the magnitude and location of prestressing forces need to be documented as they directly affect how the concrete will respond under load. Prestressing is a technique that enhances the performance of concrete by introducing internal stresses, and knowing both the magnitude and location helps in evaluating how forces will be distributed throughout the structure.

Furthermore, including the stressing sequence for post-tensioning tendons is vital for ensuring that tendons are tensioned in a specific order to prevent cracking and ensure stability during construction and afterward. The sequence affects the load distribution and can influence overall structural performance.

Thus, the choice to include all of these factors in construction documents is necessary to provide a comprehensive understanding of the project's structural requirements. Each component works together to ensure that the construction process meets engineering specifications, safety standards, and performance expectations.