Clash Detection in Action
                     Clash  Detection  in  Action
Resolving   Design  Conflicts  with  Building  Information  Modeling
Table of Contents
01 Understanding Clash Detection
02 The Cost of Undetected Clashes
03 BIM-Powered Solutions
Understanding Clash Detection
What Is It? Why It Matters Types
Detects and resolves spatial Reduces rework, delays, and cost Hard Clashes: physical 
conflicts between building overruns by finding design-phase interference
systems before construction to conflicts when fixes are cheaper. Soft Clashes: clearance or 
avoid costly on-site issues. tolerance breaches
Workflow Clashes: sequencing 
conflicts
● • Automated conflict ● Cost savings ● MEP vs. structural
identification • Real-time ● Schedule adherence ● Access requirements
coordination
The Cost of Undetected Clashes
Rework Delays Waste Labor
Demolition and Schedule disruptions that Material waste from Increased labor hours for 
reconstruction of cascade through the components that must problem-solving, 
installed components project timeline, affecting be modified or discarded coordination meetings, 
that conflict with other multiple trades and due to conflicts, and implementing field 
systems, often costing extending overall contributing to fixes for issues that could 
12-15% of total completion dates. environmental impact have been prevented.
construction budget. and disposal costs.
BIM-Powered Clash Detection
Before 2D After
Traditional 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.
Clash Detection Workflow
01 03 05
Import Run Coordinate
Discipline Automated Solution
Models 02 Analysis 04 Strategies 06
Set Review Validate
Detection Clash Changes
Parameters Reports Implemented
Real-World Clash Examples
MEP Plumbing Ceiling Access
HVAC ducts Water/drainage Light fixtures Maintenance 
crossing pipes routed and sprinkler zones 
structural through heads overlapping 
beams, forcing electrical competing for fixed elements, 
reroutes or conduits, the same blocking proper 
beam changes causing safety ceiling space, servicing and 
to restore risks and affecting operation.
system service coverage and 
efficiency. problems. code 
compliance.
Before & After: Clash Resolution
Before Detection After Resolution
MEP and structural conflicts in the office core with ducts, pipes, and trays Coordinated solution with rerouted services, modified structural elements, 
competing for space between beams. and optimized space utilization, eliminating all critical clashes before 
construction.
Business Benefits
Cost Savings Schedule
Cuts costly on-site rework and change 1 2 Avoids construction delays by 
orders by finding conflicts before resolving conflicts in design 
construction; up to 40% cost reduction. rather than during building.
Early Clash
Quality Risk
Enhances building quality by ensuring Reduces project risk with more 
systems integrate as designed, avoiding 3 4 predictable outcomes, fewer RFIs, 
last-minute field fixes. and fewer stakeholder disputes.
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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