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Elements and Performance Criteria

1. Interpret plans or designs and create layouts
   • Identify and verify design inputs.
   • Check computer software for currency and use to prepare roof truss layouts and production documentation.
   • Resolve design requirements outside software limitations.
2. Review and test design options
   • Review and test roof truss layouts for optimal suitability for stakeholders.
   • Use effective processes to optimise roof truss layout and ensure stakeholder objectives are met.
3. Provide advice on design, production and installation issues
   • Prepare and document production and installation advice.
   • Communicate documented advice to all stakeholders, prior to and following installation.
4. Manage roof truss outputs
   • Certify roof truss design layouts in line with regulatory and organisational requirements and communicate to relevant stakeholders.
   • Store and maintain drawings and documentation in line with organisational procedures.

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 organizational policies and procedures relevant to preparing and advising on a broad range of timber roof truss details using computers

prepare and advise on a broad range of timber roof truss details using computers

prepare roof truss layouts and production documentation for roof truss types across the following list:

"A" type truss

truncated standard

raking truss

girder truss

truncated girder

jack girder

rafter truss

gable truss

saddle truss

bowstring truss

vaulted truss

truncated saddle

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Knowledge Evidence

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

content and application of applicable regulations for certifying roof truss design layouts

limits of personal ability and authority for non-conforming design including

Building Codes of Australia

Australian Standards

organisational quality standards

common industry standard sizes, profiles and spacing dimensions

shapes of common roof types:

bell

bowstring

dual pitch

gabled

hipped

mansard

skillion

interaction between roof truss types

design inputs including:

identified standards

pitching lines and load bearing points

and design factors including:

roof material loads

wind zone and applied loads

commercial or residential output

additional roof loading

post disaster structures

roof shape

roof lines

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 procedures specific to producing drawings and documents and advising on roof truss details:

communication reporting lines for internal and external stakeholders

certifying roof truss layouts

filing computerised drawings and documentation

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