Analyse edaphic interactions of trees and structures

Formats and tools

Unit Description
Reconstruct the unit from the xml and display it as an HTML page.
Assessment Tool
an assessor resource that builds a framework for writing an assessment tool
Assessment Template
generate a spreadsheet for marking this unit in a classroom environment. Put student names in the top row and check them off as they demonstrate competenece for each of the unit's elements and performance criteria.
Assessment Matrix
a slightly different format than the assessment template. A spreadsheet with unit names, elements and performance criteria in separate columns. Put assessment names in column headings to track which performance criteria each one covers. Good for ensuring that you've covered every one of the performance criteria with your assessment instrument (all assessement tools together).
Wiki Markup
mark up the unit in a wiki markup codes, ready to copy and paste into a wiki page. The output will work in most wikis but is designed to work particularly well as a Wikiversity learning project.
Evidence Guide
create an evidence guide for workplace assessment and RPL applicants
Competency Mapping Template
Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners. A template for developing assessments for a unit, which will help you to create valid, fair and reliable assessments for the unit, ready to give to trainers and students
Observation Checklist
create an observation checklist for workplace assessment and RPL applicants. This is similar to the evidence guide above, but a little shorter and friendlier on your printer. You will also need to create a seperate Assessor Marking Guide for guidelines on gathering evidence and a list of key points for each activity observed using the unit's range statement, required skills and evidence required (see the unit's html page for details)

Self Assessment Survey
A form for students to assess thier current skill levels against each of the unit's performance criteria. Cut and paste into a web document or print and distribute in hard copy.
Moodle Outcomes
Create a csv file of the unit's performance criteria to import into a moodle course as outcomes, ready to associate with each of your assignments. Here's a quick 'how to' for importing these into moodle 2.x
Registered Training Organisations
Trying to find someone to train or assess you? This link lists all the RTOs that are currently registered to deliver AHCARB803, 'Analyse edaphic interactions of trees and structures'.
Google Links
links to google searches, with filtering in place to maximise the usefulness of the returned results
Reference books for 'Analyse edaphic interactions of trees and structures' on This online store has a huge range of books, pretty reasonable prices, free delivery in Australia *and* they give a small commission to for every purchase, so go nuts :)

Elements and Performance Criteria


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