HVE  
Engineering New Zealand Technical Group  

 
 
 

 

Heavy Vehicle Certification


What is Heavy Vehicle Certification?

There are three ways in which a Heavy Vehicle Certifying Engineer (HVCE) becomes involved in the Certification of Heavy Vehicles

Firstly, if as a result of a Certificate of Fitness (CoF) inspection the Transport Services Delivery Agent (TSDA) finds something that needs to be repaired on a vehicle, they will issue the owner with a notice outlining where the repair is required, and request a completed LT400 Form for the certification of the completed repair. It is then up to the vehicle owner to find a suitable repairer of their choosing to undertake the repair work, and a Heavy Vehicle Certifying Engineer to issue an LT400 to certify the completed repair.

Secondly, if the owner or the Transport Services Delivery Agent (TSDA) finds something needs to be certified or re-certified on the vehicle, the vehicle owner needs a Heavy Vehicle Certifying Engineer to certify/re-certify the component as compliant with required standards, or recommend steps that need to be taken for certification/re-certification to be able to be completed and a new LT400 produced.

Thirdly, vehicle owners who wish to have modifications undertaken, or wish to design new components for their vehicle which change part or all of the structure or layout of their heavy vehicle, also need to find a Transport Engineer/Company to undertake the work and a Heavy Vehicle Certifying Engineer to oversee the work.

In all cases, the vehicle's modifications, new designs, repairs or re-certification needs to be certified by a Heavy Vehicle Certifying Engineer

  • The Certifying Engineer must inspect the vehicle BEFORE any structural work has been undertaken, so that they can provide design instructions, drawings and specifications to the transport engineer/company undertaking the repairs/modifications
  • The Certifying Engineer will often inspect the vehicle whilst the work is in progress
  • The Certifying Engineer MUST PERSONALLY re-inspect the vehicle and alterations AFTER completion of the repairs/modification to ensure that the work was undertaken to the specifications and standards required
  • When the Heavy Vehicle Certifier is satisfied with the work that has been undertaken, he/she will issue an LT400 which certifies the repair/modification as being complete and up to required standards
  • The owner presents the LT400 to a Heavy Vehicle Testing Station for loading into the NZ Transport Agency Landata computer records system
  • The owner may deal directly with the Certifying Engineer, or the repair agent may contact the Certifying Engineer on behalf of the client. 
    (Note: Some Vehicle Manufacturers have their own Certifying Engineers)

LT400

The LT400 is the NZ Transport Agency form that a Heavy Vehicle Certifying Engineer issues upon completion of repair/modification work

It contains:

  • Heavy Vehicle Inspector's Name & ID
  • Vehicle Identifiers (Reg. No. & VIN / Chassis No.)
  • Component & Certification Category
  • Description of Work - Repair, Modification and/or Component Descriptions
  • Code or Standard to which the component has been certified
  • Component Load Rating
  • Supporting Documentation (that the HVCE has on file)
  • Any Special Conditions
  • Certification Expiry Date or Hubometer Reading (if applicable)
  • HVCE Signature & Date

The owner needs to immediately give the ORIGINAL LT400 to the CoF Testing Agent. The LT400 is used to demonstrate certification to the CoF Agent, and subsequently the NZ Transport Agency, that the work was undertaken and completed to the required standard(s). The Testing Agent loads this information into the Land Transport NZ Landata computer records system

Categories of Certification

There are many different categories of certification and each individual Certifying Engineer must pass examination in the category or categories s/he chooses before being allowed to certify Heavy Vehicles for that particular type of work. See below for a list of the type of Heavy Vehicle Certification Categories and the work involved in each:

CERTIFICATION CATEGORY

COMPONENTS COVERED

HVEC

CHASSIS MODIFICATIONS AND REPAIRS:
Chassis Extensions/Shortening etc
Chassis & Suspension Modifications
Chassis Rust Repairs
Design of new Chassis and Ratings
Mounting of Cranes and other Equipment
Seat Belt Anchorages
PSV Rollover Strength & Stability
Steering Conversions
Modifications and Repairs to Drivetrains and Axles
Engine Transmission

HVEA

LOAD ANCHORAGES:
Chain Hooks
Rope Rails
Twist Locks/Chain Plates etc.

HVEL

LOG BOLSTER ATTACHMENTS:
Logging bolster attachments, modifications and repairs

HVET

TOWING CONNECTIONS:
Drawbars
Drawbeams
Towbars
5th Wheel Assemblies (Tractors)
Kingpin Assembly (Semi Trailer)

HVEK

BRAKE RULE CERTIFICATION:
Heavy vehicle brake system design and modification

HVS1

STATIC ROLL THRESHOLD (SRT1):
Vehicle Stability - Basic Vehicle Arrangements/Shapes
(Flat Decks, Stock Crates, Tankers, Bath Tubs -  with Generic Suspensions)

HVS2

STATIC ROLL THRESHOLD (SRT2):
Vehicle Stability - Complex Vehicle Arrangements/Shapes
(Transporters, Grain Trailers etc... or with Specifically Defined Suspensions)
Overweight permits for Import/Export Containers

HVS3

STATIC ROLL THRESHOLD (SRT3):
Vehicle Stability – Practical test of performance using an authorised tilt bed or computer simulation

HVP1

SWEPT PATH 1:
Swept Path Certification provides exemptions from:

  • travel time restrictions
  • requirement to be escorted by a Class 2 pilot vehicle
  • requirement to be escorted by a Class 1 pilot vehicle

HVP2

SWEPT PATH 2:
Dynamic Vehicle Performance (PBS) analysis for proposed high productivity vehicles, either new pro-forma or bespoke designs

Finding the Right Certifier
To find an approved HVE Certifier qualified for the particular vehicle component you need certified and/or in your region, go to the Search page on this website. If you have any problems with trying to find a suitable Certifier, do not hesitate to contact us: Contact