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Coordination, Clash Detection and Resolution ...

BIM or Building Information Modeling plays an important role for design coordination, clash detection and conflict resolution.

BIM selectively check for interactive clashes among any particular system, between MEP system and structural system etc. Clash checks are carried out at any level of detail (LOD) and across any number of building systems to resolve myriad probable construction dilemmas.

Clash Detection facilitates well-organized inspection, identification and reporting of interfering clash in a 3D-4D BIM model involving different 3D-4D solid objects.

The coordinated models may be utilized for quantity takeoff, locations, scheduling, and estimating.


  • Diminish the risk of human error throughout model inspections
  • Resolve dilemmas at the design stage sooner than the construction phase when rework is enormously expensive
  • Produce a collaborative atmosphere amid all stakeholders performing in the direction of geting the best potential solutions to bottlenecks
  • Helps to reduce the risk of on-site error
  • The Coordinated models generate more precise quantities by location; do a comprehensive clash
  • The coordinated models cause more off-site prefabrication which can save hours of re-work in the field
  • The buildings are oriented and designed to achieve optimal energy efficiency


Design/Construction Team must accomplish and manage an adequate and comprehensive Clash Detection practice to identify and resolve all major interferences among building components become the commencing of actual construction. If the building interference is found to be zero then it will result in minimizing the number of changes all through the construction.

The BIM Manager will accumulate a compound model from all of the model parts of each design discipline for executing a visual check of the building design for spatial and system coordination. Vertical shafts are also evaluated to make sure that ample space has been arranged for all of the vertical mechanical systems and that all of the shafts line up floor to floor. BIM manager will issue a revised clash report to the technical discipline consultants before each scheduled coordination meeting.

In case of a multistory project, the models are spilt on a level-by-level basis for MEPF coordination. For a large project the model is split by zones to trim down file size. Usually, 3D clash detection/coordination go on with a single floor awaiting for coordination of building systems and then continues on the next floor up.

Coordination software may be applied for assembling a range of design models to electronically recognize, collectively coordinate resolutions, and track and circulate interference reports between all disciplines. The technical disciplines shall be responsible for updating their models to reflect the coordinated resolution.

The team should analyze the model and the Clash Reports in coordination meetings on a usual as-needed basis during the design stages until all spatial and system coordination issues are resolved.

All through the construction phase, the accurateness of fabrication models are verified. Before starting fabrication submittal for approval, fabrication contractors must put forward their models to the Contractor’s BIM Manager for integration and clash detection/coordination and resolution.

Internal Clash Resolution – Design Consultants and Subcontractors required to coordinate the clashes among the various scope of work earlier than providing those models to the BIM Manager for spatial and system coordination.

Spatial Coordination Verification: Verification and tracking of resolved conflicts of all trade coordination issues must be resolved before the starting of bidding as these may lead to change orders or field conflicts.

Latest innovation in clash detection system is Tekla BIMsight. It is a free clash detection and coordination product.

Useful links :-

BIM clash detection

Coordination and Clash Detection

Minimum Requirements for Spatial Coordination and Clash Detection

Benefits of contractor:

  • Synchronized Design and construction Planning
  • Synchronized procurement
  • Cost and schedule reduction
  • Track construction activities
  • Discover of errors and omissions Clash
  • React rapidly to design or Site problems
  • Communicate virtual schedule and time line
  • Use model for basis of fabrication
  • Lean Construction techniques
  • Reduced on site labor
  • Improved design quality
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