Unit of competency details

DEFDV014B - Perform concreting in an underwater environment (Release 2)

Summary

Releases:
ReleaseStatusRelease date
2 (this release)Current 24/Jan/2013
(View details for release 1) Replaced15/Mar/2012

Usage recommendation:
Superseded
Mapping:
MappingNotesDate
Is superseded by DEFWDV014 - Perform concreting in an underwater environmentElements and Performance Criteria edited and prerequisite unit removed 16/Aug/2017

Training packages that include this unit

Classifications

SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 040399 Building, N.e.c.  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 040399 Building, N.e.c.  03/Sep/2012 
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Modification History

Release 

TP Version 

Comments 

2

DEF12 V2

Layout adjusted. No changes to content.

1

DEF12 V1

Primary release.

Unit Descriptor

This unit covers the competency required to concrete simple forms and excavations in an underwater environment.

The unit also includes preparing the underwater site for concreting including any necessary excavation and levelling, constructing simple formwork and positioning reinforcement rods and fixed anchorages.

The diver will need to prepare the concrete with consideration given to strength and setting periods. The concrete will need to be poured and screeded to the required finish.

The diver will be responsible for the recovery of formwork and waste arising from the work task to ensure the preservation of the environment. Finally, the concreting tools must be de serviced and stored appropriately for ongoing use.

Note: This Unit of Competency relates, in part, to the existing standards of the Australian Diver Accreditation Scheme (ADAS). All information was correct at the time of development of this Unit of Competency; however, any diver seeking ADAS accreditation should consult ADAS and not rely on the information contained in this unit.

Application of the Unit

As agreed in the creation of this Training Package, applications for units transferred from the PUA00 Public Safety Training Package will be developed as part of continuous improvement plans, and taking into account the change in Unit of Competency format as detailed in templates for Streamlined Training Packages

Licensing/Regulatory Information

Not applicable.

Pre-Requisites

DEFDV001B Dive using self contained underwater breathing apparatus in open water to 30 metres.

Employability Skills Information

This unit contains employability skills.

Elements and Performance Criteria Pre-Content

Elements describe the essential outcomes of a Unit of Competency.

Performance Criteria describe the required performance needed to demonstrate achievement of the element. Where bold italicised  text is used, further information is detailed in the Range Statement. Assessment of performance is to be consistent with the Evidence Guide.

Elements and Performance Criteria

ELEMENT 

PERFORMANCE CRITERIA 

1. Prepare for underwater concreting 

1.1 Work task  and worksite data  are determined and analysed to determine the specific requirements for the concrete. 

1.2 Work plan is developed consistent with the dive plan.

1.3 Concreting equipment  is selected , inspected and prepared  including protective equipment. 

1.4 Concreting equipment is secured safely to/from the dive site.

1.5 Access obstructions and other hazards are assessed and action is taken to remove /reduce the risk. 

2. Concrete underwater site 

2.1 Work-safe area is established at the worksite.

2.2 Site is cleared and levelled in preparation for the pour.

2.3 Formwork  is assembled including stripping agents.

2.4 Reinforcing bars, rods, stirrups and mesh, bar chairs and spacers are positioned.

2.5 Cement is mixed in accordance with the setting and strength specifications.

2.6 Location and safety of divers is confirmed prior to commencing the pour.

2.7 Cement is delivered  to the site with a consistent flow.

2.8 Concrete is spread to the required levels incorporating expansion joints.

2.9 Concrete is screeded to a level and the surface is finished using floats or brooms.

2.10 Concrete is protected  during curing.

3. Conclude underwater concreting 

3.1 Environmental impact  arising from the concreting is minimised and waste products and formwork are recovered.

3.2 Concreting and protective equipment are de-serviced and stored after use.

Required Skills and Knowledge

This describes the essential skills and knowledge and their level, required for this unit.

Required Skills 

  • establish formwork
  • mix and pour cement
  • operate cement tools and equipment
  • screed concrete

Required Knowledge 

  • concreting on land
  • dive equipment
  • dive physics
  • general occupational/diving safety awareness
  • oceanography
  • relevant references and Australian Standards
  • work hazards

Evidence Guide

Critical aspects for assessment and evidence required to demonstrate competency in this unit 

Assessment must confirm the ability to attend to personal and collective safety; and to consider the environmental impact as part of the dive plan.

Consistency in performance 

Competency should be demonstrated during a work task where the diver conducts an underwater concreting task such as the reinforcement of pier legs, the placement of footings or laying of a slab or ramp.

Context of and specific resources for assessment 

Context of assessment 

Competency should be assessed in the ocean.

When practicable, assessment should relate to the diver s vocational focus.

Specific resources for assessment 

Access to a dive location, a complete range of concrete ingredients and concreting equipment.

Range Statement

The Range Statement relates to the Unit of Competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised  wording in the Performance Criteria is detailed below.

Work task  may include:

  • pad foundation
  • post holes
  • slabs
  • trench foundations

Worksite data  may include:

  • current
  • depth
  • gradient
  • hazards
  • obstacles
  • temperature

Concrete  may vary by:

  • composition/strength
  • setting time

Concreting equipment  may include:

  • manual, fuel and electrically operated mixers
  • shovel
  • vibrator

Selecting, inspecting and preparing concreting equipment  may include:

  • pre-construction of formwork
  • pre-mixing

Protective equipment  may include:

  • boots
  • gloves

Action to remove/reduce the risk  may include:

  • erecting signage
  • using patrol/sentry craft

Formwork  may include:

  • bracing
  • edge boards
  • pegs
  • struts

Delivery of cement  may be via:

  • manual
  • pump-line
  • shute

Protection of concrete  may include:

  • use of plastic sheeting

Environmental impact  may include:

  • contamination of surrounding water (e.g. leaking oil)
  • physical damage to reef and associated floor eco-systems (e.g. coral)
  • visual pollution of waste material (e.g. concrete and metal parts)

Unit Sector(s)

Not applicable.

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