NZQA registered unit standard
20462 version 2
Page 1 of 6
Title
Operate a self-propelled roller for chipseal surfacing
Level
3
Credits
8
Purpose
People credited with this unit standard are able to: demonstrate
knowledge of chipseal compaction equipment and chipseal
compaction; identify, assess, control, and monitor health and
safety hazards and adverse effects on the environment of
chipseal compaction operations; perform operator servicing
and maintenance on a self-propelled roller; prepare for rolling
chipseal surfaces; control a self-propelled roller on chipseal
construction sites; compact chipseal surfaces; and move a selfpropelled roller from site to site.
Classification
Pavement Surfacing > Chipseal Surfacing
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Unit 16702, Demonstrate knowledge and skills for driving on a
road for endorsement R (rollers), or demonstrate equivalent
knowledge and skills.
Explanatory notes
1
The following legislation and current editions of the following documents must be
complied with:
Health and Safety in Employment Act 1992;
Traffic Regulations 1976;
Operator Safety Manual for Earthmoving Machinery (Operator Safety Manual),
Infrastructure ITO, available at
http://www.infrastructureito.org.nz/InfraTrain_Forms.htm;
New Zealand Transport Agency specifications, available at
http://www.nzta.govt.nz/resources/–
NZTA P3: Specification for First Coat Sealing;
NZTA P4: Specification for Resealing;
NZTA P17: Performance Based Specification for Bituminous Reseals.
Manufacturer’s instructions.
2
Personal protective equipment must be used throughout operations in accordance
with company procedures.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
20462 version 2
Page 2 of 6
3
When working on the road candidates must hold a current full driver licence of the
appropriate class for the gross vehicle mass of the vehicle to be used for assessment
and where required by legislation, the appropriate licence endorsement for the
vehicle being driven.
4
Assessment against this unit standard must be based on evidence from a workplace
context.
5
Competence requires knowledge of vibrating rollers. Skills for outcomes 4-8 may be
demonstrated on a vibrating or a non-vibrating self-propelled roller.
6
Definitions
Company procedures refers to all documented policies, procedures, and
methodologies of the candidate’s employer at the time of training including but not
limited to those relating to health, safety, environment, quality, and operations.
Job requirements take account of site conditions to meet contract specifications, and
accord with procedures and work instructions written in quality manuals. They are
determined by the supervisor.
Walk round means to walk around a machine or equipment inspecting it, and its
environment, for hazards and removing hazards that may impair operation.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of chipseal compaction equipment.
Evidence requirements
1.1
Static and vibrating self-propelled rollers are compared in terms of their use and
effects on chipseal surfaces.
Range
static – three-wheeled steel, multiwheeled pneumatic-tyred;
vibrating – combination tandem (vibrating drum and pneumatictyred).
1.2
Equipment is described in terms of effect of roller weight on chipseal surfaces.
1.3
Equipment is described in terms of its suitability for different site conditions.
Range
1.4
Rollers are described in terms of limitations on their use.
Range
1.5
slope, pavement shape, physical site constraints, access,
clearances, obstructions.
dead load, live load, vibration hazards.
Equipment is described in terms of maintenance requirements.
Range
Infrastructure ITO
SSB Code 101813
scraper operation, cleaning rollers, cleaning tyres, tyre pressure,
tyre wear, oil leaks, fuel leaks.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
20462 version 2
Page 3 of 6
Outcome 2
Demonstrate knowledge of chipseal compaction.
Evidence requirements
2.1
Compaction with different types of roller is described in terms of rolling
operations required to meet job requirements.
Range
2.2
Compaction is described in terms of avoiding chip pick-up, crushing and chip
orientation.
Range
2.3
roller types, at least two of – three-wheeled steel, multiwheeled
pneumatic-tyred, combination tandem;
rolling operations – sequence, pattern, number of passes.
Average Least Dimension (ALD), Average Greatest Dimension
(AGD), chip grades.
Compaction is described in terms of effects of traffic on new chipseal surface.
Range
effects – beneficial, adverse.
Outcome 3
Identify, assess, control, and monitor health and safety hazards and adverse effects on the
environment of chipseal compaction operations.
Evidence requirements
3.1
Health hazards are identified and the procedures and equipment for controlling
them are described in accordance with company procedures.
3.2
Safety hazards are identified and the procedures and equipment for controlling
them are described in accordance with the company procedures, and the
Operator Safety Manual.
Range
procedures include but are not limited to – operating while
reversing, lines of sight.
3.3
Adverse effects on the environment are identified, and the procedures and
equipment for controlling them are described in accordance with company
procedures.
3.4
Health and safety hazards are assessed, controlled, and monitored in
accordance with company procedures.
Range
Infrastructure ITO
SSB Code 101813
includes but is not limited to – obstructions, people in the vicinity,
lines of sight.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3.5
20462 version 2
Page 4 of 6
Adverse effects on the environment are assessed, controlled, and monitored in
accordance with company procedures.
Range
includes but is not limited to – noise, dust.
Outcome 4
Perform operator servicing and maintenance on a self-propelled roller.
Evidence requirements
4.1
Machinery is checked for operator servicing requirements and minor
adjustments are made in accordance with manufacturer’s instructions.
Range
4.2
Where routine servicing indicates that it is required, specialist maintenance is
reported to specialist mechanic or supervisor in accordance with company
procedures.
Range
4.3
includes but is not limited to – fuel, lubricants, water levels,
hydraulic fluid level, cleanliness, machine controls and gauges.
may include but is not limited to – tyres, batteries, fuel lines,
coolants, hydraulic pressure.
Routine servicing and maintenance are documented in accordance with
company procedures.
Outcome 5
Prepare for rolling chipseal surfaces.
Evidence requirements
5.1
Job requirements are confirmed in accordance with company procedures and
contract and site requirements.
Range
5.2
includes but is not limited to – selection of roller.
Prestart safety and equipment checks are carried out in accordance with
manufacturer’s instructions and company procedures.
Range
checks – walk round, safety equipment, cleanliness, leaks, fuel,
oil, water;
may include but is not limited to – scrapers, tyre pressure,
hydraulic hoses.
5.3
Startup checks and procedures are followed in accordance with manufacturer’s
instructions and company procedures.
5.4
Machine is manoeuvred into position in accordance with company procedures
and job requirements.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
20462 version 2
Page 5 of 6
Outcome 6
Control a self-propelled roller on chipseal construction sites.
Evidence requirements
6.1
Roller is manoeuvred safely in accordance with the Operator Safety Manual and
site safety requirements.
6.2
Roller is controlled on slopes in accordance with manufacturer’s instructions
and the Operator Safety Manual.
6.3
Roller is manoeuvred with smoothness of movement and machine stability.
Range
braking, acceleration, change in direction, skid prevention.
6.4
Control of roller is demonstrated without damage to services, people, plant,
roadside furniture, kerb, pavement edge, or adjacent structures.
6.5
Vibration is monitored and controlled without damage to pavement or adjacent
structures.
6.6
Shutdown procedures are followed in accordance with manufacturer’s
instructions.
Outcome 7
Compact chipseal surfaces.
Evidence requirements
7.1
Rolling pattern, sequence, and number of passes is carried out in accordance
with job requirements.
7.2
Roller operations are carried out to avoid chip pickup, crushing, chip roll over
and skidding.
7.3
Compaction of surfaces adjacent to structures is carried out without damage to
machine or structures.
Outcome 8
Move a self-propelled roller from site to site.
Evidence requirements
8.1
Roller is driven on road in accordance with traffic regulations and local authority
requirements.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
8.2
20462 version 2
Page 6 of 6
Roller is loaded onto, parked on, and unloaded from transporter in accordance
with manufacturer’s and transporter operator’s instructions.
excludes – permits, securing, transporting.
Range
Planned review date
31 December 2016
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
27 October 2005
31 December 2013
Review
2
15 March 2012
N/A
Consent and Moderation Requirements (CMR) reference
0101
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact Infrastructure ITO askus@infratrain.co.nz if you wish to suggest changes to
the content of this unit standard.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016