Structural geometry review
Review of pillars, roof members, side structures, cross-members, openings, reinforcements and structural continuity.
Regulatory Engineering Support
UN R66 Structural Design Inputs
Engineering support for preparing vehicle geometry, structural data, mass information, connections and design inputs for rollover-related assessment and superstructure development.
Engineering Objective
Rollover performance begins with the vehicle structure
Structural continuity, load paths, joints, pillars, roof members, openings, mass distribution and the position of the residual space must be considered during the vehicle design stage. Late structural corrections can create significant weight, cost and programme impact.
Reliable assessment requires controlled input data
Structural geometry, material properties, joints, vehicle mass, centre-of-gravity information and the actual vehicle configuration must be consistent. Incorrect or incomplete inputs can produce misleading engineering conclusions.
Service Scope
Engineering inputs from structural concept to assessment preparation
Support can be provided during initial vehicle development, design revision, derivative preparation or investigation of an existing superstructure.
Material and section data
Organisation of material grades, section dimensions, wall thicknesses and available mechanical-property information.
Connection definition
Review and documentation of welded, bolted, bonded and mechanical joints relevant to structural behaviour.
Mass and centre-of-gravity inputs
Preparation of vehicle mass distribution, component positions, load conditions and centre-of-gravity information.
Residual-space preparation
Definition and positioning of the applicable residual-space geometry according to the vehicle layout and assessment scope.
Design-improvement support
Development of reinforcement, section, joint and structural-layout revisions based on identified risks and assessment findings.
Typical Review Areas
Key inputs affecting superstructure performance
The final scope must be agreed for the actual vehicle, structural configuration and assessment method.
A-, B-, C- and other structural pillar arrangements
Roof rails, roof bows and upper structural connections
Side-wall members, waist rails and lower structural members
Door, window and emergency-exit structural openings
Chassis-to-body and floor-to-side-structure interfaces
Welded joints, gussets, brackets and reinforcement plates
Vehicle mass, passenger load and major equipment locations
HVAC, battery, tank and auxiliary-equipment mass effects
Residual-space geometry and passenger-compartment relationship
Differences between vehicle lengths, variants and derivatives
Project Workflow
From vehicle data to controlled structural-design actions
Collect
Structural CAD, drawings, sections, materials, masses and vehicle configuration data are collected.
Review
Geometry, load paths, joints, openings and residual-space inputs are examined.
Prepare
Analysis or assessment inputs are organised according to the agreed project method.
Evaluate
Structural findings, critical areas and unresolved assumptions are reviewed.
Improve
Approved reinforcement and structural revisions are incorporated into the vehicle design.
Project Outputs
Traceable structural inputs for assessment and design development
Structural-data package
Organised CAD, drawings, member sections, thicknesses, materials and connection information.
Mass and configuration package
Vehicle masses, equipment positions, loading assumptions and centre-of-gravity inputs.
Risk and action list
Critical structural areas, missing inputs, unresolved assumptions and recommended engineering actions.
Design-revision inputs
Proposed section, reinforcement, joint and layout revisions for the next vehicle-design iteration.
TLG SYSTEMS provides structural engineering, data preparation and
design-support services. Formal calculation acceptance, physical
testing, certification and approval decisions remain under the
authority of the appointed technical service and responsible approval
body.
Start Your Structural Review
SEND STRUCTURAL DATA
Need to prepare a vehicle superstructure for rollover assessment?
Send us the structural CAD data, vehicle drawings, materials, section information, connection details, mass data and intended vehicle configuration. We will review the input package and define the required engineering work.