NZQA registered unit standard
20420 version 3
Page 1 of 4
Title
Replace transmission tower structure steel
Level
4
Credits
6
Purpose
People credited with this unit standard are able to: demonstrate
knowledge of transmission tower structure steel replacement;
plan the replacement of transmission tower steel; and replace
transmission tower structure steel, and complete job record; in
accordance with industry requirements.
Classification
Electricity Supply > Electricity Supply - Transmission Networks
Available grade
Achieved
Entry information
Critical health and
safety prerequisites
Unit 24746 Rig electrical network structures, or demonstrate
equivalent knowledge and skills
Explanatory notes
1
This unit standard can be assessed in a workplace environment, or in a training or
educational environment if simulated equipment and examples are able to be
provided, or in a combination of both environments.
2.
Safety of personnel and plant must be a priority throughout the assessment. If the
safety requirements are not met the assessment must stop.
3
Performance and work practices in relation to the outcomes and evidence
requirements must comply with all current legislation, especially the Electricity Act
1992 and any subsequent amendments, and any regulations, codes of practice
recognised under that statute; Health and Safety in Employment Act 1992, the
Resource Management Act 1991, and their subsequent amendments; electricity
supply industry codes of practice and documented enterprise procedures. These
include updated versions of Safety Manual – Electricity Industry (SM-EI) Wellington:
Electricity Engineers’ Association.
A full list of current legislation and industry codes is available from:
Infrastructure Industry Training Organisation
PO Box 2759
Wellington 6140.
4
Reference to terms, procedures, and specifications in this unit standard may be
taken as including industry documented procedures and specifications relevant to the
workplace in which assessment is carried out.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
5
20420 version 3
Page 2 of 4
The following terms and abbreviations relate to this unit standard:
Asset owner refers to an electricity industry participant who owns or operates assets
used for generating or conveying electricity.
Asset owner procedures are the approved documented work site methods for
carrying out work on electrical generation assets or supply network to the standard
required by the asset owner.
Industry requirements include all asset owner procedures; manufacturers’
specifications; and enterprise requirements which cover the documented workplace
policies, procedures, specifications, and business and quality management
requirements relevant to the workplace in which assessment is carried out.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of transmission tower structure steel replacement in accordance
with industry requirements.
Evidence requirements
1.1
Steel members requiring replacement are defined.
1.2
The concepts of tower structure compression, tension, and loading are
described.
Outcome 2
Plan the replacement of transmission tower structure steel in accordance with industry
requirements.
Evidence requirements
2.1
Scope of work is determined.
2.2
Steel members that can be removed without risk are identified.
2.3
Steel members that require temporary load removal, by-passing, or removal of
structure loads are identified.
2.4
Rigging loads are calculated and rigging plan developed.
2.5
Tooling is selected to match work instruction.
Outcome 3
Replace transmission tower steel, and complete job record, in accordance with industry
requirements.
Evidence requirements
3.1
Electrical clearances are maintained.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
20420 version 3
Page 3 of 4
3.2
Steel member is identified as loaded or not loaded prior to removal.
3.3
Rigging plan is complied with.
3.4
Tower is rigged to temporarily remove load from steel member.
3.5
Steel requiring replacement is removed.
3.6
Replacement steel is installed.
3.7
Bolts are torqued.
3.8
Worksite is reinstated.
3.9
Job record is completed.
may include but is not limited to – job sheets, test results, structure
report, condition assessment.
Range
Planned review date
31 December 2020
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
20 April 2004
31 December 2018
Review
2
23 April 2008
31 December 2018
Review
3
20 August 2015
N/A
Consent and Moderation Requirements (CMR) reference
0120
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
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
20420 version 3
Page 4 of 4
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 the Infrastructure ITO (Connexis) qualifications@connexis.org.nz if you
wish to suggest changes to the content of this unit standard.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016