UNIT CODE

DCMTTP622

UNIT TITLE

Interpret basic timber tests

APPLICATION

This unit describes the performance outcomes, skills and knowledge required to interpret quality assurance testing data applicable to timber as per international and Australian Standards

The unit of competency is applied by technicians in a structural and civil engineering environment for selection, test interpretation, and application of timber according to national standards.

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

• DCMCMT601 Apply construction materials testing fundamentals
• DCSBME604 Use basic mathematics in engineering
• DCSCON605 Use basic construction in engineering

ELEMENT

Elements describe the essential outcomes.

PERFORMANCE CRITERIA

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

1.    Summarise the physical and mechanical properties of timber.

1.1.      Outline the macrostructure of wood

1.2.      Outline processes for conversion and seasoning of timber.

1.3.      Compare the characteristics of types of timber products used for construction

1.4.       Compare the mechanical properties of timber to those of steel and concrete.

1.5.       Explain the factors affecting timber strength.

2.    Interpret tests related to timber according to the Standards

2.1.      Observe and report on the outcome of timbers tests in accordance with Standards

2.2.      Explain test results in accordance with International Standard 13910

FOUNDATION SKILLS

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

UNIT MAPPING INFORMATION

No equivalent unit.

TITLE

Assessment requirements for DCMTTP622 Interpret basic timber testing

PERFORMANCE EVIDENCE

To achieve competency in this unit a person must satisfy the requirements of the elements and performance criteria, foundation skills and range of conditions included in the unit.

The person must also:

• Identify applicable standards from Australian Standards 1080,1720.2, and International Standard 13910g
• Elaborate on the macrostructure of wood, including:
  • Anisotropy
  • Variability
  • Moisture effects
• Compare the charactersitics of at least four of the following timber products used for construction:
  • Plywoods
  • Blockboards
  • Chipboards
  • Oriented strand boards (OSB)
  • Laminated strand lumber (LSB)
  • Cross-laminated timber (CLT)
  • Glulam (GLT)
• Explain at least four of the following mechanical properties of timber that are essential for timber design:
  • Density
  • Young’s modulus
  • Thermal conductivity
  • Thermal diffusivity
  • Embodied energy
  • Tensile strength
  • Compressive strength
  • Bending/flexural strength
  • Hardness
• Explain factors affecting timber strength including:
  • Grain direction
  • Specific gravity
  • Moisture content
  • Temperature
• Observe and report on the outcome of each of the following timber tests (from Australian Standards 1080,1720.2):
  • a moisture content test for timber as per method 1
  • a timber grain slope test as method 2
  • a density test for timber as per method 3
• Report on sample results for at least three of the following tests from International Standard 13910:
  • tensile strength test for timber
  • the compressive strength test
  • the bending strength test for timber and method to determine the modulus of rupture and modulus of elasticity
  • the torsional strength test
  • the shear strength test
• Prepare a brief report to describe the outcome of each observed or performed test

Note: If a specific volume or frequency is not stated, then evidence must be provided at least once for each criterion.

KNOWLEDGE EVIDENCE

To achieve competency in this unit a person must demonstrate knowledge of:

• Key principles of CAD, including
• CAD software capabilities
• different approaches to drawing
• the coordinate system
• efficient drafting practices
• environmental and occupational health and safety (OHS) issues associated with the tools, materials and environment
• resources used to provide relevant legislation, copyright and intellectual property issues

ASSESSMENT CONDITIONS

Assessment conditions:

All assessment must be completed in accordance with work health and safety standards.

When assessments are conducted remotely, invigilation software must be used to ensure authenticity of work completed.

Model answers or marking guides must be provided for all assessments to ensure reliability of assessment judgements when marking is undertaken by different assessors.

The candidate must have access to all tools, equipment, materials and documentation required.

Assessor Requirements:

Assessors must satisfy the assessor requirements in the standards for registered training organisation (RTOs) current at the time of assessment.

Assessors must also hold a tertiary qualification in engineering or related field.

Assessors must have worked for at least 3 years in industry where they have applied the skills and knowledge covered in this unit of competency.

The RTO must also ensure that trainers and assessors keep their industry knowledge up to date through ongoing professional development.

The RTO must take appropriate steps, as an ongoing procedure, to verify information about trainer and assessor’s qualifications, vocational competencies and current industry skills