This unit specifies the skills and knowledge required to concrete simple forms and excavations in an underwater environment.

It includes preparing for underwater concreting, constructing simple formwork, and positioning reinforcement rods and fixed anchorages. It also includes pouring and screeding the concrete to the required finish, recovering formwork and waste, and deservicing and storing tools.

This unit relates, in part, to existing standards in the Australian Diver Accreditation Scheme (ADAS).

This unit applies to persons working as Defence Divers, but is applicable to other people in this field.

The skills and knowledge described in this unit must be applied within the legislative, regulatory and policy environment in which they are carried out. Organisational policies and procedures must be consulted and adhered to.

Persons undertaking this unit work independently and perform specific tasks in a range of contexts that could be unpredictable.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare for underwater concreting

1.1

Identify and analyse work task and worksite data to determine the specific requirements for the concrete

1.2

Develop work plan consistent with dive plan

1.3

Select, inspect and prepare equipment

1.4

Secure concreting equipment safely to/from dive site

1.5

Assess access obstructions and other underwater hazards to determine risks and to manage risk control measures in accordance with dive plan

2

Concrete underwater site

2.1

Determine safety of work area at worksite

2.2

Prepare site in accordance with work plan

2.3

Assemble formwork to meet task requirements

2.4

Position reinforcing bars, rods, stirrups and mesh, bar chairs and spacers as required

2.5

Mix cement and deliver to site in accordance with work plan and concrete strength specifications

2.6

Take measures to confirm location and safety of divers prior to commencing pour, in accordance with operational procedures

2.7

Spread and screed concrete in accordance with work plan

2.8

Undertake tasks to finish surface, ensuring it is protected during curing

3

Complete underwater concreting

3.1

Minimise environmental impact arising from concreting and recover waste materials on completion of task

3.2

De-service and store all equipment, in accordance with operational procedures

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria on at least one occasion and include:

applying relevant legislation, standards and organisational policies and procedures

applying underwater risk control measures and work plan requirements

calculating cement mix ratios according to strength specifications

completing underwater concrete work including:

assembling formwork and stripping agent

clearing and levelling site to prepare for pouring

ensuring a consistent pour when delivering cement

operating cement tools and equipment

protecting concrete during curing

conducting at least one of the following underwater concreting tasks:

reinforcing pier legs

placing footings

laying a slab or ramp.

developing underwater concreting work plan

planning underwater concreting work

using floats and brooms to finish surface.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

concrete setting and strength specifications

dive equipment

dive physics

dive physiology and medicine including:

heat and cold illnesses

compression illnesses

decompression illnesses

diving descent and ascent techniques

general diving safety awareness including:

diving in harbours

diving in tidal waters, currents and tides

diving on and/or near a ship’s bottom

lost/separated

entrapment/foul lines

marine animal threats

pollution/weeds

working in confined spaces

oceanography

relevant legislation, standards, and organisational policies and procedures

relevant risk mitigation organisational procedures including workplace hazard mitigation.

As a minimum, assessors must satisfy applicable regulatory requirements, which include requirements in the Standards for Registered Training Organisations current at the time of assessment.

As a minimum, assessment must satisfy applicable regulatory requirements, which include requirements in the Standards for Registered Training Organisations current at the time of assessment.

Assessment must occur in workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated workplace operational situations that replicate workplace conditions.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Resources for assessment must include access to:

a range of relevant exercises, case studies and/or other simulations

relevant and appropriate materials, tools, equipment and personal protective equipment currently used in industry

dive location

ocean with a range of oceanic, diurnal and nocturnal environments

applicable documentation including organisational procedures, regulations, codes of practice and operation manuals.

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

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the Companion Volume Implementation Guide.

Not applicable.

Work Diving