This unit of competency specifies the outcomes required to understand and apply principles of structural engineering to analyses of building designs for residential, commercial and industrial buildings as defined in the Building Code of Australia (BCA), including additions and renovations. The unit supports the work of drafters who assist and work under the supervision and instruction of architects and building designers in preparing design drawings for client, planning and construction approval. The drafter is not responsible for the structural integrity of the building, but contributes to assessing building compliance with specific requirements relating to structural integrity, as specified in relevant codes and standards. The drafter requires the skills and knowledge to recognise and bring to the attention of the designer structural anomalies in the building design drawings. Licensing, legislative, regulatory or certification requirements apply to building design drafting in some states. Relevant state and territory regulatory authorities should be consulted to confirm those requirements.