BIM & VDC SERVICES
Clash Detection
Systematic interference testing, issue tracking, and resolution reporting across every discipline’s
coordinated model.
Our Founding and Mission
Introduction
NexMEP Global LLC supports U.S. consulting firms with clash detection production — the specific, systematic process of running interference tests across a federated multidisciplinary model, categorizing and prioritizing the results, and tracking each identified conflict through to documented resolution. This service is distinct from our broader BIM Coordination offering, which manages the governance layer of standards, LOD, and meeting facilitation; clash detection is the focused technical QA process that runs within that governance framework, testing the actual geometry of every discipline’s model against every other discipline’s model.
Our team runs this testing process working from the clash test rules, tolerance criteria, and priority framework your project’s BIM execution plan establishes, without making engineering decisions about how any individual clash should be resolved.
DESIGN ACCURACY & COMPLIANCE
Why This Service Matters
Clash detection is the mechanism that catches physical conflicts between disciplines before they become field conflicts — a duct routed through a structural beam, a light fixture conflicting with a sprinkler head, a piece of equipment that cannot physically fit in the space allocated to it. Running this testing consistently, with well-organized test rules and thorough tracking of every identified issue to resolution, is what actually delivers the coordination benefit that BIM promises; without disciplined follow-through, clash detection becomes a report nobody acts on.
Production support allows this labor-intensive, detail-sensitive testing process to be run on a consistent cadence throughout the design process, rather than as a single overwhelming exercise late in design when resolving issues is far more disruptive to an already-advanced design.
Our Capabilities
Automated & Rule-Based Clash Testing
Configuring matrix-based clash tests across disciplines with tailored clearances and tolerance thresholds.
Non-Issue & False Positive Filtering
Reviewing raw interference results to strip out nominal touches, structural embedments, and harmless overlaps.
Severity & Location Categorization
Grouped issue logs organized by building level, grid zones, discipline pairs, and conflict criticalities.
Trend Reporting & Analytics
Tracking open versus resolved clash trends across testing cycles to evaluate discipline progress.
Congested Zone Identification
Pinpointing high-density conflict zones (e.g., corridors, mechanical rooms) for targeted design reviews.
Verification & Closure Audits
Confirming that underlying model geometry updates actually resolve reported issues before closing logs.
Calculations
Engineering Calculations
Calculation methodology built for accurate, traceable HVAC equipment sizing.
Geometrical QA & Hard Interference Testing
Rigorous technical testing comparing physical element boundaries across discipline models for spatial hard clashes.
Clearance & Maintenance Access Audits
Flagging violations of required equipment maintenance zones, code clearances, and installation pathways.
Calculations
Systems We Support
Ventilation-related calculation support includes outdoor air rate compilation.
Mechanical vs. Structural
Ductwork, hydronic piping, and equipment vs. beams, columns, and slabs.
Electrical vs. Mechanical
Cable trays, conduit runs, and switchgear clearances vs. ductwork and piping.
Plumbing vs. Structural
Gravity waste, storm drain slopes, and domestic water vs. foundations and joists.
Fire Protection vs. All Disciplines
Sprinkler main lines, branch lines, and drops vs. ceiling grids, lights, and ducts.
Architectural vs. MEP Clearance
Ceiling grid elevations, wall penetrations, and door swings vs. MEP devices.
Civil vs. MEP Sub-Grade Ties
Exterior underground utility conduits and piping vs. structural foundation footings.
Our clash detection workflows cover all multidisciplinary combinations, applying custom tolerances and clearances to eliminate interferences across the entire
federated model.
Calculations
Software, Workflow & Coordination
Rigorous backup calculations formatted directly for permit submission and QA/QC documentation.
Software & Production Workflow
Executed in Autodesk Navisworks using aggregated federated models. Test rules are aligned with your project’s BEP and updated phase by phase, delivering structured clash reports directly ahead of team coordination sessions.
Revit & AutoCAD Coordination
We coordinate directly with discipline authoring teams to verify model versions, link geometries, and track clash fixes back to active model files before marking entries as resolved.
Calculations
Systems We Support
Expertise across diverse equipment lines, hybrid configurations, and complex Electrical setups.
Categorized Clash Detection Reports
Actionable Issue Tracking Logs
Multi-Cycle Trend Analyses
High-Density Zone Review Flags
Need Systematic Clash Detection & Issue Tracking?
Partner with NexMEP Global LLC for rigorous interference testing, false-positive filtering, and actionable resolution logs.
Our Core Philosophy
Typical Project Types
Healthcare & Labs
Hospitals, research facilities, and medical centers with highly congested ceiling zones.
Commercial & High-Rise
Office towers, mixed-use developments, corporate centers, and retail complexes.
Education & Healthcare
K-12 school sites, university campuses, and specialized research facilities.
Industrial & Hospitality
Multi-building logistics hubs, manufacturing plants, hotels, and resorts.
Calculations
QA/QC Process
A rigorous, multi-tiered review structure ensuring accurate, clear, and error-free submittals.
Test Rule & Model Version Audits
Pre-test verification confirming rules reflect current project phases and models are updated to active releases.
Independent Resolution Verification
Secondary review confirming flagged issues are physically resolved in updated geometry before closure.
Trend & Rate Balance Reviews
Auditing resolution rates against new issue generation to prevent coordination bottlenecks late in design.
Why NexMEP Global LLC?
NexMEP Global LLC brings a dedicated production team with practical experience across standard and specialty ventilation systems, a consistent U.S. code and standards focus, and a multi-level QA/QC process that reduces rework during your engineer’s review cycle.