AS 91624 Annotated exemplars

This annotated exemplar is intended for teacher use only. Annotated exemplars are extracts of student evidence, with commentary, that explain key parts of a standard. These help teachers make assessment judgements at the grade boundaries.

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For Excellence, the student needs to demonstrate comprehensive understanding of a structural system.

This involves discussing and justifying possible ways of increasing the structural integrity of a structural system.

There is no student work currently available at this grade.

A student may, for example, investigate a timber framed house as the structural system.

The student would discuss and justify any improvements needed on the house that they have studied, for example if it was to change location within NZ to a different wind and/or earthquake zone, or for a change of roof material type. This discussion should include how and why structural components need to change to conform to this new zone or roof type.

The student could enhance their report with annotated photographs, diagrams, sketches, a slideshow, and/or video evidence.

For Merit, the student needs to demonstrate in-depth understanding of a structural system.

This involves:

• discussing how the structural members and materials work together to enable a structural system to achieve structural integrity
• evaluating the structural integrity of a structural system.

There is no student work currently available at this grade.

A student may, for example, investigate a timber framed house as the structural system.

The student would evaluate the house that they have studied and comment on the integrity of the system as a whole, from the foundations upward. This could involve explanations of how different structural members work together to ensure that the house maintains structural integrity and meets the needs for a house located within the specified wind and/or earthquake zone, or for a change of roof material type.

The student would typically use terms such as durability, fitness for purpose, strength, loading, shear planes, and should relate their comments to the particular wind and/or earthquake zone or roof type change it was designed for.

The student could enhance their report with annotated photographs, diagrams, sketches, a slideshow, and/or video evidence.

For Achieved, the student needs to demonstrate understanding of a structural system.

This involves:

• explaining the structural members and materials that are used to achieve a structural system
• explaining how a structural system has been designed to withstand known load requirements and dynamic loads using technical language, diagrams and symbols as appropriate
• discussing the structural integrity of a structural system and how this impacts on the selection of structural members, and construction materials and techniques.

There is no student work currently available at this grade.

A student may, for example, investigate a timber framed house as the structural system.

The student would typically explain foundations, wall construction, roof construction, and the connection between the members to achieve a certified NZ timber-framed house (and hence a safe, dry, and long-lasting dwelling). The explanation would refer to materials used in these members such as concrete foundations, timber frames and timber trusses.

The student may include diagrams to assist their explanations and use correct technical language such as studs, sheet bracing, and trusses.

The student would typically explain the effect the zone in which the house is situated has on its structural system, such as, changes in terms of wind, topography, and earthquake.

The student could illustrate and annotate the structural system and use symbols that comply with NZS/AS1100.301:1985.

The student would typically discuss the way a timber-framed house is assembled, the materials used, and what structural members are used to ensure that the house complies with NZS3604, and hence address structural integrity.

The student could enhance their report with annotated photographs, diagrams, sketches, a slideshow, and/or video evidence.