21773 version 2 Page 1 of 3 Demonstrate and apply knowledge of mechanical statics for mechanical engineering Level 4 Credits 15 Purpose People credited with this unit standard are able to: describe given concepts in mechanical statics; apply mechanical statics principles to specified applications; and apply stress and strain principles to steel components. Subfield Mechanical Engineering Domain Applied Principles of Mechanical Engineering Status Registered Status date 27 October 2005 Date version published 19 March 2010 Planned review date 31 December 2015 Entry information Open. Replacement information This unit standard and unit standard 21774 replaced unit standard 11388 and unit standard 11389. Accreditation Evaluation of documentation and visit by NZQA. Standard setting body (SSB) Competenz Accreditation and Moderation Action Plan (AMAP) reference 0013 This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do. Special notes All activities must comply with: any policies, procedures, and requirements of the organisations involved; the ethical codes and standards of relevant professional bodies; and any relevant legislative and/or regulatory requirements which may include but are not limited to the Health and Safety in Employment Act 1992, and its subsequent and delegated legislation. New Zealand Qualifications Authority 2016 21773 version 2 Page 2 of 3 Elements and performance criteria Element 1 Describe given concepts in mechanical statics. Range concepts – statics, equilibrium, forces, vectors, stress, strain. Performance criteria 1.1 Concepts are described in terms of main features, purpose, and use. 1.2 Supporting practical examples provide valid illustrations of the concepts. Element 2 Apply mechanical statics principles to specified applications. Performance criteria 2.1 The principles of forces, moments, and couples are applied to specified applications. Range applications – coplanar force systems, loading of beams, frameworks, centres of gravity. Element 3 Apply stress and strain principles to steel components. Performance criteria 3.1 Direct stress, indirect stress, and direct strain calculations are performed to determine the suitability of components for use. 3.2 Torsional stress and strain calculations are performed to determine the suitability of solid and hollow sections for use. 3.3 Determined working stresses conform with published allowable stresses for given types of loading, fixing, and factors of safety. Range 3.4 published allowable stresses – manufacturers’ and/or material suppliers’ data. Second moments of area are calculated on the basis of determined working stress and/or allowable working stress. New Zealand Qualifications Authority 2016 21773 version 2 Page 3 of 3 Please note Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards. Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards. Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements. Comments on this unit standard Please contact Competenz info@competenz.org.nz if you wish to suggest changes to the content of this unit standard. New Zealand Qualifications Authority 2016