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Evidence Guide: AHCARB803 - Analyse edaphic interactions of trees and structures

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

AHCARB803 - Analyse edaphic interactions of trees and structures

What evidence can you provide to prove your understanding of each of the following citeria?

Determine soil attributes

  1. Research repose angle of soil materials
  2. Research soil plasticity
  3. Measure soil moisture content and field capacity of soil
  4. Research the effects of soil moisture on soil cohesion and plasticity
  5. Research modes of soil liquefaction
  6. Determine soil texture
  7. Assess level of soil cohesion
  8. Determine shear strength of the soil of concern
  9. Research load bearing capacity of soil of concern
  10. Determine mass of the soil plate
Research repose angle of soil materials

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research soil plasticity

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Measure soil moisture content and field capacity of soil

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research the effects of soil moisture on soil cohesion and plasticity

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research modes of soil liquefaction

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine soil texture

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess level of soil cohesion

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine shear strength of the soil of concern

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research load bearing capacity of soil of concern

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine mass of the soil plate

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine root attributes

  1. Determine root morphology, division and distribution
  2. Determine amount of buttressing of tree
  3. Determine species development of tap root system
  4. Research identifying anatomical features of tree roots
  5. Identify tree roots based on anatomical features
Determine root morphology, division and distribution

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine amount of buttressing of tree

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine species development of tap root system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research identifying anatomical features of tree roots

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Identify tree roots based on anatomical features

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate forces from roots

  1. Research, experimentally model or demonstrate forces and pressures exerted into or through the soil, directly and indirectly by trees
  2. Estimate and measure dimensions of roots exerting a force on a structure of concern
  3. Calculate total surface area of the roots exerting a force on a structure of concern
  4. Calculate force exerted by roots per unit of surface area of structure
  5. Calculate total force exerted by roots of a given surface area
Research, experimentally model or demonstrate forces and pressures exerted into or through the soil, directly and indirectly by trees

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Estimate and measure dimensions of roots exerting a force on a structure of concern

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate total surface area of the roots exerting a force on a structure of concern

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate force exerted by roots per unit of surface area of structure

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate total force exerted by roots of a given surface area

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine structure attributes

  1. Measure and determine volume of structure of concern
  2. Research and calculate mass of the structure and adjacent structures
  3. Consider the impact of gravity on mass
  4. Determine affect of leverage on the forces exerted by tree roots onto structure of concern
Measure and determine volume of structure of concern

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research and calculate mass of the structure and adjacent structures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Consider the impact of gravity on mass

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Determine affect of leverage on the forces exerted by tree roots onto structure of concern

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Define the root-soil matrix factors for root/soil breakage

  1. Determine factors of root–soil matrix interactions
  2. Consider area of contact between root and soil
  3. Consider elasticity, tensile strength and breaking stress of roots
  4. Investigate root cross-sectional morphology
  5. Assess extent of root plate damage, deficiencies or defects
  6. Estimate impact of static and dynamic testing for root plate stability
  7. Evaluate the likelihood of root failure by root breakage
  8. Evaluate the likelihood of anchorage failure by soil breakage or slippage
Determine factors of root–soil matrix interactions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Consider area of contact between root and soil

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Consider elasticity, tensile strength and breaking stress of roots

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Investigate root cross-sectional morphology

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assess extent of root plate damage, deficiencies or defects

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Estimate impact of static and dynamic testing for root plate stability

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Evaluate the likelihood of root failure by root breakage

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Evaluate the likelihood of anchorage failure by soil breakage or slippage

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research structural engineering solutions

  1. Research and consider effects of increasing mass
  2. Research and consider methods for, and effects of, increasing the modus of rupture
  3. Research and consider effects of use of curved structures
  4. Research and consider effects of soil mass and friction
  5. Research and consider effects of use of anchors, braces and props
  6. Compile a portfolio of above research including personal annotations and calculations
Research and consider effects of increasing mass

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research and consider methods for, and effects of, increasing the modus of rupture

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research and consider effects of use of curved structures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research and consider effects of soil mass and friction

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Research and consider effects of use of anchors, braces and props

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Compile a portfolio of above research including personal annotations and calculations

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare stability and expert witness reports

  1. Prepare report on likelihood of tree causing damage to structure of concern including all test results, assumptions and calculations
  2. Provide design suggestions to mitigate likelihood of damage to a similar replacement structure
  3. Prepare report on relative stability of tree as a result of a defective or damaged root plate
  4. Provide design suggestions to mitigate likelihood of whole tree failure as a result of defective or damaged root plate
  5. Prepare expert witness report on harm by roots on structures; or on stability of tree with a defective or damaged root plate, as required
Prepare report on likelihood of tree causing damage to structure of concern including all test results, assumptions and calculations

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Provide design suggestions to mitigate likelihood of damage to a similar replacement structure

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare report on relative stability of tree as a result of a defective or damaged root plate

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Provide design suggestions to mitigate likelihood of whole tree failure as a result of defective or damaged root plate

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare expert witness report on harm by roots on structures; or on stability of tree with a defective or damaged root plate, as required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Facilitate teamwork

  1. Review construction and engineering language terminology
  2. Discuss installation and protection measures to non-arboricultural project personnel
  3. Resolve issues in construction and engineering terminology
  4. Communicate in the language, concepts, basic science and technology of construction, architecture and engineering allied professions
Review construction and engineering language terminology

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Discuss installation and protection measures to non-arboricultural project personnel

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Resolve issues in construction and engineering terminology

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Communicate in the language, concepts, basic science and technology of construction, architecture and engineering allied professions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Element

Performance criteria

Elements describe the essential outcomes.

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

1. Determine soil attributes

1.1 Research repose angle of soil materials

1.2 Research soil plasticity

1.3 Measure soil moisture content and field capacity of soil

1.4 Research the effects of soil moisture on soil cohesion and plasticity

1.5 Research modes of soil liquefaction

1.6 Determine soil texture

1.7 Assess level of soil cohesion

1.8 Determine shear strength of the soil of concern

1.9 Research load bearing capacity of soil of concern

1.10 Determine mass of the soil plate

2. Determine root attributes

2.1 Determine root morphology, division and distribution

2.2 Determine amount of buttressing of tree

2.3 Determine species development of tap root system

2.4 Research identifying anatomical features of tree roots

2.5 Identify tree roots based on anatomical features

3. Calculate forces from roots

3.1 Research, experimentally model or demonstrate forces and pressures exerted into or through the soil, directly and indirectly by trees

3.2 Estimate and measure dimensions of roots exerting a force on a structure of concern

3.3 Calculate total surface area of the roots exerting a force on a structure of concern

3.4 Calculate force exerted by roots per unit of surface area of structure

3.5 Calculate total force exerted by roots of a given surface area

4. Determine structure attributes

4.1 Measure and determine volume of structure of concern

4.2 Research and calculate mass of the structure and adjacent structures

4.3 Consider the impact of gravity on mass

4.4 Determine affect of leverage on the forces exerted by tree roots onto structure of concern

5. Define the root-soil matrix factors for root/soil breakage

5.1 Determine factors of root–soil matrix interactions

5.2 Consider area of contact between root and soil

5.3 Consider elasticity, tensile strength and breaking stress of roots

5.4 Investigate root cross-sectional morphology

5.5 Assess extent of root plate damage, deficiencies or defects

5.6 Estimate impact of static and dynamic testing for root plate stability

5.7 Evaluate the likelihood of root failure by root breakage

5.8 Evaluate the likelihood of anchorage failure by soil breakage or slippage

6. Research structural engineering solutions

6.1 Research and consider effects of increasing mass

6.2 Research and consider methods for, and effects of, increasing the modus of rupture

6.3 Research and consider effects of use of curved structures

6.4 Research and consider effects of soil mass and friction

6.5 Research and consider effects of use of anchors, braces and props

6.6 Compile a portfolio of above research including personal annotations and calculations

7. Prepare stability and expert witness reports

7.1 Prepare report on likelihood of tree causing damage to structure of concern including all test results, assumptions and calculations

7.2 Provide design suggestions to mitigate likelihood of damage to a similar replacement structure

7.3 Prepare report on relative stability of tree as a result of a defective or damaged root plate

7.4 Provide design suggestions to mitigate likelihood of whole tree failure as a result of defective or damaged root plate

7.5 Prepare expert witness report on harm by roots on structures; or on stability of tree with a defective or damaged root plate, as required

8. Facilitate teamwork

8.1 Review construction and engineering language terminology

8.2 Discuss installation and protection measures to non-arboricultural project personnel

8.3 Resolve issues in construction and engineering terminology

8.4 Communicate in the language, concepts, basic science and technology of construction, architecture and engineering allied professions

Required Skills and Knowledge

Element

Performance criteria

Elements describe the essential outcomes.

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

1. Determine soil attributes

1.1 Research repose angle of soil materials

1.2 Research soil plasticity

1.3 Measure soil moisture content and field capacity of soil

1.4 Research the effects of soil moisture on soil cohesion and plasticity

1.5 Research modes of soil liquefaction

1.6 Determine soil texture

1.7 Assess level of soil cohesion

1.8 Determine shear strength of the soil of concern

1.9 Research load bearing capacity of soil of concern

1.10 Determine mass of the soil plate

2. Determine root attributes

2.1 Determine root morphology, division and distribution

2.2 Determine amount of buttressing of tree

2.3 Determine species development of tap root system

2.4 Research identifying anatomical features of tree roots

2.5 Identify tree roots based on anatomical features

3. Calculate forces from roots

3.1 Research, experimentally model or demonstrate forces and pressures exerted into or through the soil, directly and indirectly by trees

3.2 Estimate and measure dimensions of roots exerting a force on a structure of concern

3.3 Calculate total surface area of the roots exerting a force on a structure of concern

3.4 Calculate force exerted by roots per unit of surface area of structure

3.5 Calculate total force exerted by roots of a given surface area

4. Determine structure attributes

4.1 Measure and determine volume of structure of concern

4.2 Research and calculate mass of the structure and adjacent structures

4.3 Consider the impact of gravity on mass

4.4 Determine affect of leverage on the forces exerted by tree roots onto structure of concern

5. Define the root-soil matrix factors for root/soil breakage

5.1 Determine factors of root–soil matrix interactions

5.2 Consider area of contact between root and soil

5.3 Consider elasticity, tensile strength and breaking stress of roots

5.4 Investigate root cross-sectional morphology

5.5 Assess extent of root plate damage, deficiencies or defects

5.6 Estimate impact of static and dynamic testing for root plate stability

5.7 Evaluate the likelihood of root failure by root breakage

5.8 Evaluate the likelihood of anchorage failure by soil breakage or slippage

6. Research structural engineering solutions

6.1 Research and consider effects of increasing mass

6.2 Research and consider methods for, and effects of, increasing the modus of rupture

6.3 Research and consider effects of use of curved structures

6.4 Research and consider effects of soil mass and friction

6.5 Research and consider effects of use of anchors, braces and props

6.6 Compile a portfolio of above research including personal annotations and calculations

7. Prepare stability and expert witness reports

7.1 Prepare report on likelihood of tree causing damage to structure of concern including all test results, assumptions and calculations

7.2 Provide design suggestions to mitigate likelihood of damage to a similar replacement structure

7.3 Prepare report on relative stability of tree as a result of a defective or damaged root plate

7.4 Provide design suggestions to mitigate likelihood of whole tree failure as a result of defective or damaged root plate

7.5 Prepare expert witness report on harm by roots on structures; or on stability of tree with a defective or damaged root plate, as required

8. Facilitate teamwork

8.1 Review construction and engineering language terminology

8.2 Discuss installation and protection measures to non-arboricultural project personnel

8.3 Resolve issues in construction and engineering terminology

8.4 Communicate in the language, concepts, basic science and technology of construction, architecture and engineering allied professions

The candidate must be assessed on their ability to integrate and apply the performance requirements of this unit in a workplace setting. Performance must be demonstrated consistently over time and in a suitable range of contexts.

The candidate must provide evidence for and demonstrate:

researching repose angle of soil materials

researching soil plasticity

measuring soil moisture content and field capacity of soil

researching the effects of soil moisture on soil cohesion and plasticity

researching modes of soil liquefaction

determining soil texture

assessing level of soil cohesion

determining shear strength of the soil of concern

researching load bearing capacity of soil of concern

determining mass of the soil plate

determining root morphology, division and distribution

determining amount of buttressing of tree

determining species development of tap root system

researching identifying anatomical features of tree roots

identifying tree roots based on anatomical features

researching, experimentally modelling or demonstrating forces and pressures exerted into or through the soil, directly and indirectly by trees

estimating and measuring dimensions of roots exerting a force on a structure of concern

calculating total surface area of the roots exerting a force on a structure of concern

calculating force exerted by roots per unit of surface area of structure

calculating total force exerted by roots of a given surface area

measuring and determine volume of structure of concern

researching and calculate mass of the structure and adjacent structures

considering the impact of gravity on mass

determining affect of leverage on the forces exerted by tree roots onto structure of concern

determining factors of root–soil matrix interactions

considering area of contact between root and soil

considering elasticity, tensile strength and breaking stress of roots

investigating root cross-sectional morphology

assessing extent of root plate damage, deficiencies or defects

estimating impact of static and dynamic testing for root plate stability

evaluating the likelihood of root failure by root breakage

evaluating the likelihood of anchorage failure by soil breakage or slippage

researching and considering effects of increasing mass

researching and considering methods for, and effects of, increasing the modus of rupture

researching and considering effects of use of curved structures

researching and considering effects of soil mass and friction

researching and considering effects of use of anchors, braces and props

compiling a portfolio of above research including personal annotations and calculations

preparing report on likelihood of tree causing damage to structure of concern including all test results, assumptions and calculations

providing design suggestions to mitigate likelihood of damage to a similar replacement structure

preparing report on relative stability of tree as a result of a defective or damaged root plate

providing design suggestions to mitigate likelihood of whole tree failure as a result of defective or damaged root plate

preparing expert witness report on harm by roots on structures; or on stability of tree with a defective or damaged root plate, as required

reviewing construction and engineering language terminology

discussing installation and protection measures to non-arboricultural team members

resolving issues in construction and engineering terminology

communicating in the language, concepts, basic science and technology of construction, architecture and engineering allied professions.

The candidate must demonstrate knowledge of:

repose angle of soil materials

soil plasticity

soil moisture content

field capacity of soil

effects of soil moisture on soil cohesion and plasticity

modes of soil liquefaction

soil texture

soil cohesion

shear strength of the soil

load bearing capacity

mass of soil plate

root morphology

root division

root distribution

buttressing

species development of tap root systems

anatomical features of tree roots

identification of tree roots based on anatomical features

research, experimental modelling and demonstration methods

forces and pressures exerted into or through the soil, directly and indirectly by trees

estimation and measurement of dimensions of roots exerting a force on a structure

calculation of the total surface area of the roots exerting a force on a structure

calculation of the force exerted by roots per unit of surface area of structure

calculation of the total force exerted by roots of a given surface area

measurement of volume of structures

calculation of the mass of structures

impact of gravity on mass

affect of leverage on the forces exerted by tree roots onto structure

factors of root–soil matrix interactions

area of contact between root and soil

elasticity of roots

tensile strength of roots

breaking stress of roots

root cross-sectional morphology

extent of root plate damage

extent of root plate deficiencies

extent of root plate defects

impact of static and dynamic testing for root plate stability

likelihood of root failure by root breakage

likelihood of anchorage failure by soil breakage or slippage

effects of increasing mass

effects of use of curved structures

effects of soil mass and friction

effects of, increasing the modus of rupture

effects of use of anchors, braces and props

portfolio of research

personal annotations and calculations

report preparation

test results and assumptions

relative stability of tree

whole tree failure

design suggestions for mitigation of damage and whole tree failure

harm by roots on structures

expert witness reports

expert witness report on harm by roots on structures

construction language terminology

engineering language terminology

installation and protection measures

concepts, basic science and technology of structural engineering

concepts, basic science and technology of construction

concepts, basic science and technology of architecture.

Range Statement