Clash Detection is an analytical tool, which automates the process of interference resolution between Building components of all disciplines.

• Ribbon: Building Design > Analysis > Clash Detection

A successful design workflow must include the ability to analyze the accuracy of 3D models across all disciplines to ensure that architectural, structural, and mechanical components are properly spaced for installation. The capability to identify and resolve conflicts and interferences in the design prior to construction, helps to avoids costly change orders and reduce construction costs.

Clash Detection enables you to identify sets of business and graphical elements, and to detect geometrical clashes between the object element sets. You can interactively and graphically review clashes, annotate and markup clashes, and assign clashes for follow-up work. Clash results can be grouped, marked up, and exported to an Excel spreadsheet or GPS system.

Suppression rules can be applied to identify clashes that should not be reported. The settings associated with clash runs are managed and tracked as a clash job. A clash job contains criteria, rules, and results that are saved in the active DGN file for reuse. The clash job can also be stored in a DGN library, and the job can be defined and processed in read-only files.

Clash Detection features include:

• The ability to detect clashes on native content from many different sources without translation.
• The ability to run pre-scheduled detection routines interactively, and in batch mode.
• The ability to detect hard clashes where components intersect or overlap.
• The ability to detect soft clashes where clearance tolerances are defined.
• The ability to apply customized suppression rules to reduce false results.
• The ability to select and review clash results individually from a list of detected clashes.
• The ability to define plotting options for paper or digital output.