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How BIM Coordination Reduces Clashes and Costly Rework on Construction Projects

Building Information Modelling (BIM) has fundamentally changed how multi-discipline construction projects are planned and delivered. Beyond producing 3D models, BIM enables real-time coordination between structural, architectural, and MEP (mechanical, electrical, plumbing) teams — catching conflicts before they become on-site problems.

For engineering firms and contractors managing complex projects, BIM coordination is no longer optional. It is one of the most effective tools available for protecting project schedules and controlling costs.

What is BIM Coordination?

BIM coordination is the process of combining discipline-specific models into a federated model, then reviewing the combined model to identify and resolve geometric clashes, construction sequencing issues, and design inconsistencies. It replaces the traditional 2D drawing overlay process with a dynamic, data-rich environment where every conflict is visible and traceable.

Clashes are typically categorised as hard clashes (physical overlaps, such as a structural beam penetrating a duct), soft clashes (clearance violations), and workflow or sequencing clashes. Each type has different implications for construction, and all are better resolved in the model than on the job site.

"Every clash resolved in the model is a delay avoided on site. BIM coordination protects schedules and client relationships."

--- VHS Engineering Team

Reducing Rework Through Early Clash Detection

Rework is one of the largest hidden costs in construction. When a clash is discovered during installation — for example, when a structural connection point conflicts with a mechanical service line — work must stop, parties must be consulted, redesign must occur, and previously completed work may need to be undone. The cost is not just materials; it is programme time and contractor relationships.

BIM coordination, when structured early in the design and pre-construction phase, surfaces these conflicts while changes are still inexpensive. A revised connection detail in a model takes hours. The same revision on a fabricated and delivered steel member takes days, incurs fabrication costs, and may delay the erection programme.

BIM Coordination at VHS Engineering

At VHS Engineering, BIM coordination is integrated into our structural design and detailing workflow. We produce federated models that can be used for discipline coordination, construction planning, and client review. Our team works with Revit, Tekla Structures, and Navisworks to deliver clash reports, model updates, and issue logs that drive efficient project communication.

Our coordination services cover structural-to-architectural alignment, structural-to-MEP clash resolution, hold point and access coordination, and model-based quantity take-offs to support procurement.

LOD and Model Maturity

The value of BIM coordination depends on the Level of Detail (LOD) of the models being reviewed. At LOD 300–350, structural models carry sufficient geometric and connection information to support meaningful coordination with other disciplines. At LOD 400, models are fabrication-ready and can directly inform shop drawing production and material ordering.

VHS Engineering works with clients to define appropriate LOD requirements at project outset, ensuring that the modelling investment delivers coordination value proportionate to project complexity.

Practical Steps for Effective BIM Coordination

• Establish a BIM Execution Plan (BEP) at project start to align file formats, naming conventions, and model sharing protocols
• Schedule regular coordination review meetings — weekly during design and pre-construction phases
• Use a structured issue log to track clash status, responsible parties, and resolution deadlines
• Federate and re-run clash detection after each model update, not just at milestone stages
• Ensure all RFIs and design changes are reflected in the model before re-issuing coordination reports