NZQA Expiring unit standard
23284 version 3
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Title
Install structures for infrastructure pipelaying
Level
3
Credits
18
Purpose
People credited with this unit standard are able to: prepare for
the installation of infrastructure pipelaying structures; control
the excavation; install the structures; backfill and compact; and
carry out water testing procedures and rectify any deficiencies.
Classification
Civil Works and Services > Civil Construction Works
Available grade
Achieved
Explanatory notes
1
The following legislation and requirements apply to this unit standard:
Health and Safety in Employment Act 1992;
Resource Management Act 1991;
Approved Code of Practice for Safety in Excavation and Shafts for Foundations
(Wellington: Department of Labour, 1995) (the Excavation Code), Part 1: Trenches
and Open Excavations, Sections 4 to 7. The Excavation Code is available from
http://www.osh.govt.nz/order/catalogue;
Territorial authority requirements;
Structure manufacturer’s installation requirements;
Manufacturer’s instructions.
Other requirements applicable to this unit standard may include but are not limited to:
AS/NZS 4058:2007, Precast concrete pipes (pressure and non-pressure);
NZS 3121:1986, Specification for water and aggregate for concrete;
NZS 3121:1986A1, Specification for water and aggregate for concrete: Amendment
1; and
NZS 3122:1995, Specification for Portland blended cements (General and special
purpose); all available from http://www.standards.co.nz;
OSH (Occupational Safety and Health Service of the Department of Labour)
notification;
Overhead: cable or other permit;
Code of Practice for Temporary Traffic Management produced by Transit
New Zealand, available from http://www.transit.govt.nz/technical/copttm.jsp; or
equivalent local authority requirements for working in the road;
TNZ F/03 2000, Pipe Culvert Construction (Wellington: Transit New Zealand, 2000)
available from http://www.transit.govt.nz/technical/specifications.jsp.
2
Assessment against this unit standard must be based on evidence from a workplace
context.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
23284 version 3
Page 2 of 5
3
Range
Includes excavation over 1.5 metres deep for at least one installation.
4
Personal protective equipment, appropriate to job requirements, is to be selected and
used in accordance with company procedures and manufacturer’s instructions.
5
Definitions
Company requirements include the policy, procedures, and methodologies of the
company. They include legislative and regulatory requirements, which may apply
across the company or to a specific site. Requirements are documented in the
company’s health and safety plans, traffic management plans, contract work
programmes, quality assurance programmes, policies, and procedural documents.
Contract specifications include plans, diagrams, and special technical conditions.
They do not include special administrative conditions.
Immediate environment refers to the environment in which the work is taking place such
as inner city, suburban, or rural, and may include the presence of nearby structures.
Infrastructure pipelaying refers to the installation of infrastructure pipes, fittings, and
associated structures in the road and elsewhere, normally beyond the boundary of
private property. Infrastructure pipes include sanitary sewage and stormwater, and
may include pipes or ducting for other services such as water, gas, electricity, or
telecommunications. For the purposes of this unit standard it does not include the
commissioning of the pipes or the installation of services they may house; nor does it
include jointing required to be carried out by a licensed specialist.
Lamphole cleaning eyes are also known as rodding eyes.
Manufacturer’s instructions may include specifications; installation, handling, use, and
maintenance instructions; and safety data sheets.
Pipelaying structures include wet access chambers, dry access chambers, anchor
blocks, thrust blocks, sumps and grates, lamphole cleaning eyes, pump stations,
interceptor traps, and head walls.
Sumps are also known as cesspits.
Outcomes and evidence requirements
Outcome 1
Prepare for the installation of infrastructure pipelaying structures.
Range
two types of structure.
Evidence requirements
1.1
A check is made to ensure the plan supplied is the current approved plan for the
project, and any apparent discrepancies are reported in accordance with
company requirements.
1.2
A check is made to ensure the set-out is correct, and any errors are reported in
accordance with company requirements.
1.3
A check is made to ensure that structures, materials, plant, and equipment are
as required for the installation, and any concerns are reported in accordance
with company requirements.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
23284 version 3
Page 3 of 5
1.4
A check is made to ensure that structures, materials, plant, and equipment are
located to ensure a safe and efficient operation, and any concerns are reported
in accordance with company requirements.
1.5
Site is checked for hazards, and any hazards requiring control are reported or
controlled in accordance with company requirements.
Outcome 2
Control the excavation.
Range
two types of structure.
Evidence requirements
2.1
Taking ground conditions and the immediate environment into account, the
excavation process is controlled in accordance with company and territorial
authority requirements, with no risk of harm to persons or the environment and
no damage to plant or equipment.
2.2
As required, shoring or other stabilisation of the excavation is controlled in
accordance with the Excavation Code.
2.3
As required, groundwater is controlled without destabilising the excavation, and
in accordance with company requirements and territorial authority requirements
for environmental protection.
2.4
Control ensures that excavation is achieved in accordance with job
specifications and company requirements.
2.5
Control ensures that actions to deal with any inadequate subgrade are carried
out in accordance with company and territorial authority requirements and
contract specifications.
Outcome 3
Install the structures.
Range
access chamber and two other types of structure.
Evidence requirements
3.1
Bedding material is placed, as required, in accordance with contract
specifications, company and territorial authority requirements, and structure
manufacturer’s installation requirements.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
3.2
23284 version 3
Page 4 of 5
Structures are installed in accordance with contract specifications, company
requirements, and structure manufacturer’s installation requirements, with no
risk of harm to persons or damage to structure, pipes, fittings, plant, or
equipment.
Range
considerations
for wet access chambers – watertightness, benching and
haunching, flexible connections, finished lids;
for dry access chambers – watertightness, finished lids;
for anchor blocks and thrust blocks – bearing surface, pipe
protection;
for sumps and grates – inlet and/or outlet, finished lids;
for lamphole cleaning eyes – watertightness, finished lids.
3.3
Installation checks are made in accordance with contract specifications and/or
company requirements.
3.4
As-built records are completed, as required, in accordance with contract
specifications and company requirements.
Outcome 4
Backfill and compact.
Range
access chamber and one other type of structure.
Evidence requirements
4.1
A check is made to ensure backfill material meets contract specifications, and
any discrepancies are reported in accordance with company requirements.
4.2
Backfill material is placed and compacted to meet contract specifications in
accordance with company requirements, with no risk of harm to persons or
damage to structures, pipes, fittings, plant, or equipment.
Range
includes compaction testing, as required, in accordance with
territorial authority requirements and contract specifications.
Outcome 5
Carry out water testing procedures and rectify any deficiencies.
Range
one type of structure.
Evidence requirements
5.1
Testing is carried out in accordance with company requirements to determine
that installed structure is watertight within tolerances in contract specifications
and/or territorial authority requirements, and any deficiencies are identified.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
5.2
23284 version 3
Page 5 of 5
Any deficiencies identified are reported and rectified in accordance with
company requirements.
Replacement information
This unit standard was replaced by unit standard 27328.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
26 January 2007
30 December 2016
Review
2
21 November 2008
30 December 2016
Review
3
21 July 2011
30 December 2016
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.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016