Maximizing Construction Efficiency with Clash Detection
Purpose of Clash Detection
Clash Detection is a crucial aspect of the Building Information Modeling (BIM) process, allowing experts—such as contractors, architects, project managers, and subcontractors—to identify and resolve conflicts in the construction process early on. By detecting clashes within the structural design discipline before construction begins, Clash Detection helps prevent costly errors and delays.
A 3D BIM model plays a vital role in this process by providing a computerized, visual representation that quickly identifies potential clashes. This proactive approach saves time, money, manpower, and resources during the actual construction phase.
What Do Clashes Look Like On-Site?
On-site, clashes can manifest in various forms, such as:
- Structural elements not aligning with the drawings.
- Unexpected ceiling drops needed to accommodate HVAC ducting.
- Walls that don't connect properly when placing a slab.
- MEP components (e.g., air conditioning units, heaters) having overlapping clearance zones.
- Door sizes larger than the framing opening.
- Pipework interfering with beams.
- Electrical systems conflicting with other components or clearance zones.
Why is Clash Detection Important?
Clash Detection is essential because it effectively identifies, inspects, and reports interferences within a construction project model. It integrates multiple models (structural, MEP, etc.) into a single BIM model, allowing for the identification of conflicts that, if left unresolved, could lead to significant costs and schedule delays once construction is underway.
The significance of Clash Detection is underscored by a McKinsey report, which highlights that rework in construction can account for nearly 30% of the total project cost. Additionally, 98% of megaprojects exceed their budgets by at least 30%, and 77% are 40% behind schedule. Clash Detection helps mitigate these risks by addressing potential issues before they escalate, ensuring smoother and more efficient project execution.
Clash Detection is not just a tool but a vital process that ensures the seamless integration of various components in construction, ultimately leading to more efficient, cost-effective, and timely project completion. By leveraging Clash Detection within the BIM framework, your projects can avoid costly rework and delays, keeping them on track and within budget.
Process of Clash Detection and Resolution
Generate Individual Models
Individual models are generated like Architectural, MEP, structural, etc.
Link Models
Individual models are overlapped in a single 3D model to see how elements are using space.
Run Clash Detection
Run the clash detection test on the linked model to trace if any errors or clashes exists in the model.
Generate Report
Clashes are identified and reports are generated.
Send Report
The generated report is sent to the concerned trade engineers.
Resolve Clashes
Once all the clashes are corrected the model is re-uploaded on the software.
Re-Run
The corrections are made and a re-run of the model is done to identify any further clashes.
Generate IFC
This final set + model helps us in generating a full blown detailed sheet that outlines where each element will be.
Result
Smooth sailing of the project. Lesser RFIs and no time wasted on site.