The mechanical engineer is responsible for responding to coordination markups---such as conflicts between ductwork and fire-rated walls, dampers, or structural components. By requesting a redline work session, the mechanical engineer can collaborate directly with the project architect to resolve spatial, code, and fire protection conflicts, ensuring the integrity of both mechanical systems and building code compliance.

This action aligns with best practices in Quality Control/Assurance (QA/QC) procedures, where inter-disciplinary coordination during the Construction Documents (CD) phase is essential to reduce RFIs and change orders later.

ARE 5.0 PjM Reference:

NCARB ARE 5.0 Handbook -- PjM: 'Coordination of drawings and consultant input during documentation'

AIA Best Practices: Consultant collaboration and redline review during CD phase

AHPP (Architect's Handbook of Professional Practice), 15th ed., Chapter 9: Quality Management