Requirements for trade coordination are indicated in which document?

• A. Municipal zoning ordinances.
• B. Owner's personal notes.
• C. Public advertisements.
• D. Contract documents.

Answer: (D)

Trade coordination requirements are set in contract documents because these documents define how all trades must interface, sequence, and fit their work together. They include the drawings and specifications that show where each system runs, required clearances, and the process for resolving clashes between trades. Coordination drawings, submittals, and change procedures are all part of what the contract documents establish to ensure that mechanical, electrical, plumbing, and other systems can be installed without conflicts. Municipal zoning ordinances govern land use, not on-site coordination; owner’s personal notes aren’t binding; public advertisements relate to bidding, not execution coordination. So the contract documents are where these coordination requirements reside.