Modification History
Not Applicable
Unit Descriptor
Unit descriptor |
This unit of competency specifies the outcomes required to prepare the subgrade, base and bedding courses in preparation for laying pavers. It includes identifying soil type, drainage and materials for the base; calculating quantities of base material; compacting base; and screeding to determined levels. |
Application of the Unit
Application of the unit |
This unit of competency supports the attainment of skills and knowledge to safely and effectively prepare subgrade, base and bedding course for segmental paving while working with others and in teams. |
Licensing/Regulatory Information
Not Applicable
Pre-Requisites
Prerequisite units |
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CPCCOHS2001A |
Apply OHS requirements, policies and procedures in the construction industry |
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Employability Skills Information
Employability skills |
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 performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the required skills and knowledge section and the range statement. Assessment of performance is to be consistent with the evidence guide. |
Elements and Performance Criteria
ELEMENT |
PERFORMANCE CRITERIA |
1. Plan and prepare. |
1.1. Work instructions and operational details are obtained using relevant information , confirmed and applied for planning and preparation purposes. 1.2. Safety (OHS ) requirements are followed in accordance with safety plans and policies. 1.3. Signage and barricade requirements are identified and implemented. 1.4. Tools and equipment selected to carry out tasks are consistent with the requirements of the job, checked for serviceability and any faults are rectified or reported prior to commencement. 1.5. Materials quantity requirements are calculated in accordance with plans and specifications and quality requirements . 1.6. Materials appropriate to the work application are identified, obtained, prepared, safely handled and located ready for use. 1.7. Environmental requirements are identified for the project in accordance with environmental plans and statutory and regulatory authority requirements and applied. 1.8. Importance of the design and installation of the base, bedding and surface layers in the performance of the paving project are identified. |
2. Identify soil type. |
2.1. Class of soil is identified using soil class charts. 2.2. Soil is assessed to determine its properties. 2.3. Results of penetration tests are used to determine subgrade requirements. |
3. Prepare subgrade. |
3.1. Drainage and other features are identified within the area to be paved. 3.2. Remedial actions are used where required. 3.3. Drainage needs are identified and drains put in place where required. 3.4. Services are identified in work area. 3.5. Termite barriers are identified and not breached, or remedial action is taken if needed to ensure barrier integrity is maintained. 3.6. Damp proof courses are identified and paving is constructed so that it does not compromise them. 3.7. Components are cleaned, stacked and stored for reuse or bundled for removal. |
4. Excavate the site. |
4.1. Site is excavated in preparation for paving to remove top soil, weeds and their root systems. 4.2. Factors that determine amount of excavation are identified. 4.3. Bulking factor for different soil types is calculated. |
5. Install base course materials. |
5.1. Quantity of base course materials is calculated based upon the subgrade type and purpose of the paved area. 5.2. Material is distributed over area, allowing for compaction. 5.3. Area is compacted, taking care not to over-compact base materials. 5.4. Compacting machinery is handled correctly. |
6. Install bedding course materials. |
6.1. Bedding course material is selected, ensuring that it is suitable for the purpose. 6.2. Need for geotextile materials as drainage or separation layers is determined. 6.3. Quantity of layer course materials is calculated. 6.4. Bedding course is stabilised for paths with slopes of greater than 1:15. 6.5. Transverse concrete supports are installed for driveways with a sloping pavement of greater than 5 metres. 6.6. Material is distributed over the area to be paved within tolerances stipulated by relevant standards. 6.7. If using bedding sand, area is compacted to Australian standards taking care not to over-compact base materials, and allowance is made for compaction. 6.8. Compacting machinery is handled correctly. 6.9. If using concrete, area to be paved is framed and concrete is mixed to manufacturer's directions and spread to required depth. |
7. Screed base materials. |
7.1. Base materials are screeded to levels as determined, and set out by stringlines or other mechanisms. 7.2. Excess base materials are screeded to a specified area. |
8. Clean up. |
8.1. Work area is cleared and materials disposed of, reused or recycled in accordance with legislation, regulations, codes of practice and job specification. 8.2. Plant, tools and equipment are cleaned, checked, maintained and stored in accordance with manufacturer recommendations and standard work practices. |
Required Skills and Knowledge
REQUIRED SKILLS AND KNOWLEDGE |
This section describes the skills and knowledge required for this unit. |
Required skills |
Required skills for this unit are:
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Required knowledge |
Required knowledge for this unit is:
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Evidence Guide
EVIDENCE GUIDE |
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The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package. |
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Overview of assessment |
This unit of competency could be assessed in the workplace or a close simulation of the workplace environment, provided that simulated or project-based assessment techniques fully replicate construction workplace conditions, materials, activities, responsibilities and procedures. |
Critical aspects for assessment and evidence required to demonstrate competency in this unit |
A person who demonstrates competency in this unit must be able to provide evidence of the ability to:
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Context of and specific resources for assessment |
This competency is to be assessed using standard and authorised work practices, safety requirements and environmental constraints. Assessment of essential underpinning knowledge will usually be conducted in an off-site context. Assessment is to comply with relevant regulatory or Australian standards' requirements. Resource implications for assessment include:
Assessment of this unit of competency may be in conjunction with assessment of other units commonly performed at the same time in normal job roles. Reasonable adjustments for people with disabilities must be made to assessment processes where required. This could include access to modified equipment and other physical resources, and the provision of appropriate assessment support. |
Method of assessment |
Assessment methods must:
Validity and sufficiency of evidence requires that:
Assessment processes and techniques should as far as is practical take into account the language, literacy and numeracy capacity of the candidate in relation to the competency being assessed. Supplementary evidence of competency may be obtained from relevant authenticated documentation from third parties, such as existing supervisors, team leaders or specialist training staff. |
Range Statement
RANGE STATEMENT |
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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, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
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Information includes: |
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Planning and preparation include: |
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Safety (OHS ) is to be in accordance with state and territory legislation and regulations and project safety plan and may include: |
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Tools and equipment include: |
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Materials include: |
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Quality requirements include relevant regulations, including: |
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Safely handled includes: |
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Environmental requirements include: |
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Remedial actions include: |
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Factors determining amount of excavation include: |
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Quantity of layer course materials is based upon: |
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Unit Sector(s)
Unit sector |
Construction |
Functional area
Functional area |