Should structural or MEP engineering start first?

Neither discipline always goes first. Structural and MEP engineering should be sequenced around the decisions that constrain the other system: building geometry and load paths inform structure, while equipment, shafts, routes, clearances, and service loads inform MEP design. A project may begin with architectural and structural framing concepts, an equipment-driven MEP layout, or parallel studies that are reconciled through documented coordination reviews. The responsible structural and MEP professionals decide what can proceed from the available information. The owner, architect, contractor, utilities, and AHJ retain their own decisions, and a coordinated sequence is not an approval promise.

The correct application of structural and mep sequencing starts with the actual project, not a generic promise. Confirm the jurisdiction, adopted code, design scope, existing conditions, required deliverables, and professional responsibility before relying on a conclusion. A responsible engineer documents assumptions and identifies information that still needs verification.

Project type, occupancy, existing construction, site conditions, code edition, agency requirements, and changes made after the original design can change the work. A concise answer is useful for orientation, but the signed or sealed project record must reflect the current scope and the authority's process.

• Confirm the authority having jurisdiction and current checklist
• Use current drawings, calculations, field evidence, and equipment information
• Separate engineering decisions from owner, architect, contractor, utility, and agency decisions
• Record assumptions, limitations, and questions requiring direct AHJ confirmation