Clash Detection in Construction: Understanding and Resolving Conflicts

1. Clash Detection in Construction Understanding construction clash types and solutions

2. This presentation explores the three primary types of clashes that can occur during the construction process: Hard Clashes Soft Clashes Workflow Clashes We will look at how modern BIM (Building Information Modeling) technology is used to detect and resolve these issues before they impact the project on-site.

3. Hard Clashes A hard clash is a direct, physical conflict between two or more components within a building model. Examples Impact Definition These are typically the easiest clashes to identify using automated clash detection software, as they are clear geometric conflicts. If not found before construction, hard clashes require immediate and costly on-site rework. This occurs when two objects are modeled to occupy the same space or intersect, such as a pipe passing through a steel beam.

4. Soft Clashes A soft clash, also known as a clearance clash, involves inadequate spatial tolerance for an object. Examples Impact Definition This happens when an object does not have the required buffer zone around it for installation, safety, maintenance, or operation. A common example is an air- conditioning unit that needs a specific amount of clear space for maintenance access, but another element like a wall or pipe is placed within that required zone. These clashes can cause major problems during the building's lifecycle, making maintenance difficult or impossible without significant alterations.

5. Workflow Clashes Also referred to as a 4D clash, this involves conflicts with construction scheduling and logistics. Resource Conflicts Design Conflicts Schedule Conflicts This involves clashes in material and equipment delivery. For instance, a delivery of materials arriving before the site is prepared to receive and store them can cause logistical chaos. Workflow clashes can lead to significant delays, crew downtime, and overall project inefficiency. These clashes disrupt the timeline and sequence of construction activities. An example would be scheduling a crane to be removed from a site before it is used to lift the final air-conditioning units into place.

6. Benefits of Clash Detection Using BIM for clash detection offers significant advantages that improve project outcomes. Improved Scheduling Enhanced Collaboration Cost & Time Savings By simulating the construction sequence (4D modeling), teams can identify and resolve workflow clashes, leading to a more efficient and predictable project timeline. The clash detection process fosters better communication and coordination between different teams (architectural, structural, MEP), ensuring all parts of the project work together seamlessly. Identifying and resolving clashes during the design phase is far cheaper and faster than fixing them on- site, preventing expensive rework and delays.

7. The Clash Detection Process The modern clash detection process relies on a clear, technology-driven workflow. Review and Resolve Integrate Models Run Clash Tests The project team reviews the generated clash reports, assigns responsibility for each clash, and collaborates on design solutions to resolve them before construction begins. Combine the 3D BIM models from all disciplines (structural, MEP, etc.) into one federated master model. Use specialized software to automatically run tests on the master model to identify hundreds or thousands of potential hard, soft, and workflow clashes.

8. Contact us for clash detection solutions Website Email services@bimservicesindia.com www.bimservicesindia.com