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Elements and Performance Criteria

1. Interpret plans and designs
   • Gather information about designs and plans, design factors and specifications.
   • Access and interpret industry and organisational codes and standards to ensure production of compliant drawings and production documents.
   • Identify stakeholders and consult where clarification is needed.
2. Create roof truss layouts
   • Design roof trusses to ensure compliance with identified standards.
   • Check computer software for currency.
   • Input design factors and data to software.
   • Identify pitching lines and load bearing points.
   • Input roof shapes and create roof truss layout.
   • Refer design requirements outside software limitations to appropriate personnel for resolution.
3. Review roof truss layouts
   • Identify available materials and other production efficiencies and amend designs.
   • Review designs to ensure identified standards are maintained.
   • Follow organisational procedures to refer design variations to relevant stakeholders where design varies from identified standards.
4. Create outputs
   • Prepare drawings and documentation in line with identified standards.
   • Store drawings and documentation and communicate to relevant stakeholders.

Range Statement

Not Applicable

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Performance Evidence

A person demonstrating competency in this unit must satisfy all of the elements, performance criteria and foundation skills of this unit. If a specific volume or frequency is not stated below, then evidence must be provided that the following requirements have been performed on at least one occasion:

follow organisational policies and procedures relevant to interpreting plans and designs to prepare roof truss drawings and production documents using computers

prepare roof truss drawings and production documents suitable for manufacture of roof trusses

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Knowledge Evidence

A person competent in this unit must be able to demonstrate knowledge of:

content and application of industry and organisational codes and standards for timber roof trusses including

Building Code of Australia

Australian Standards

organizational quality standards

limits of ability and authority with respect to non-conforming design

roof trusses including:

A Type truss

Truncated standard truss

Girder truss

Truncated girder

Jack truss

Rafter truss

Gable truss

Saddle truss

Raking truss

common industry standard sizes, profiles and spacing dimensions

shapes of common roof types:

bell

bowstring

dual pitch

gabled

hipped

mansard

skillion

for the drawing software:

available drawing types

design limitations

system functions and capabilities

methods to input and amend design factors and other data

methods to store and retrieve drawings

organisational policies and procedures specific to producing drawings and documents using computers:

workplace health and safety

communication reporting lines for internal and external stakeholders

filing computerised drawings and documentation

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