Clash Detection in Action

1. Clash Detection in Action Resolving Design Conflicts with Building Information Modeling

2. Table of Contents 01 Understanding Clash Detection 02 The Cost of Undetected Clashes 03 BIM-Powered Solutions

3. Understanding Clash Detection What Is It? Why It Matters Types Detects and resolves spatial conflicts between building systems before construction to avoid costly on-site issues. Reduces rework, delays, and cost overruns by finding design-phase conflicts when fixes are cheaper. Hard Clashes: physical interference Soft Clashes: clearance or tolerance breaches Workflow Clashes: sequencing conflicts ● • Automated conflict identification • Real-time coordination ● Cost savings ● Schedule adherence ● MEP vs. structural ● Access requirements

4. The Cost of Undetected Clashes Rework Delays Waste Labor Demolition and reconstruction of installed components that conflict with other systems, often costing 12-15% of total construction budget. Schedule disruptions that cascade through the project timeline, affecting multiple trades and extending overall completion dates. Material waste from components that must be modified or discarded due to conflicts, contributing to environmental impact and disposal costs. Increased labor hours for problem-solving, coordination meetings, and implementing field fixes for issues that could have been prevented.

5. BIM-Powered Clash Detection 2D Before Traditional After Drawings Automated BIM-powered clash detection transforms construction coordination by replacing manual, error-prone 2D drawing reviews with automated 3D conflict identification. This technology can reduce construction conflicts by up to 90%, minimizing costly field changes.

6. Clash Detection Workflow 01 03 05 Import Discipline Models Run Coordinate Solution Strategies Automated Analysis 02 04 06 Set Review Clash Reports Validate Changes Implemented Detection Parameters

7. Real-World Clash Examples MEP Plumbing Ceiling Access HVAC ducts crossing structural beams, forcing reroutes or beam changes to restore system efficiency. Water/drainage pipes routed through electrical conduits, causing safety risks and service problems. Light fixtures and sprinkler heads competing for the same ceiling space, affecting coverage and code compliance. Maintenance zones overlapping fixed elements, blocking proper servicing and operation.

8. Before & After: Clash Resolution Before Detection After Resolution MEP and structural conflicts in the office core with ducts, pipes, and trays competing for space between beams. Coordinated solution with rerouted services, modified structural elements, and optimized space utilization, eliminating all critical clashes before construction.

9. Business Benefits Cost Savings Schedule 2 1 Cuts costly on-site rework and change orders by finding conflicts before construction; up to 40% cost reduction. Avoids construction delays by resolving conflicts in design rather than during building. Early Clash Quality Risk Enhances building quality by ensuring systems integrate as designed, avoiding last-minute field fixes. Reduces project risk with more predictable outcomes, fewer RFIs, and fewer stakeholder disputes. 3 4

10. Implementation Best Practices Clear Protocols Standardized BIM execution plans with clash detection criteria and tolerances Team Roles Assign clash detection, review, and resolution roles across all disciplines Regular Reviews Hold regular coordination meetings dedicated to clash detection and resolution Documentation Document all clash resolution decisions and maintain a searchable database of solutions. Model Updates Keep federated models current with all discipline updates to avoid recurring clashes

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