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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Explain the dynamic interaction of the various elements to a functional roof structure 
SAQA US ID UNIT STANDARD TITLE
263814  Explain the dynamic interaction of the various elements to a functional roof structure 
ORIGINATOR
SGB Forestry 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 01 - Agriculture and Nature Conservation Forestry and Wood Technology 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 4  NQF Level 04 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
A functional roof structure is based on the key considerations of the impact of forces and weight distribution that can be handled by the holding structure. Qualifying learners apply their understanding of the various interacting factors in roof design in order to deliver estimates that do not compromise quality output.

In general, learners credited with this unit standard are able to demonstrate an understanding of the theory of structures, to which roofs are designed and arranged, to be able to carry all the applied loads.

In particular, qualifying learners are able to:
  • Discuss triangulation and the transfer of the load to the foundations.
  • Differentiate between load definitions, application and specification.
  • Identify the difference between, and impact of the different types of structural forces.
  • Identify the strength and impact of materials on a structure.
  • Describe the methods of connections used in the design and manufacture of trusses.

    This unit standard is intended to promote skills in the wood processing and construction fields in order to raise competence levels in the various industries served by informed and competent workers. 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    It is assumed that learners are competent in communication and mathematical literacy at NQF Level 3 or an equivalent. 

    UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Discuss triangulation and the transfer of the load to the foundations with respect to roof structure. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Truss triangulation is defined for estimation process. 

    ASSESSMENT CRITERION 2 
    The effect of triangulation on load transfer is discussed with respect to roof structure. 

    SPECIFIC OUTCOME 2 
    Differentiate between load definitions, application and specification with respect to roof structure. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The different types of loads are identified. 

    ASSESSMENT CRITERION 2 
    Load types are defined. 

    ASSESSMENT CRITERION 3 
    Examples of loads are given. 

    SPECIFIC OUTCOME 3 
    Identify the difference between, and impact of the different types of structural forces. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Types of structural forces are identified and described with respect to roof structure. 

    ASSESSMENT CRITERION 2 
    The impact of forces on the holding structure is described. 

    ASSESSMENT CRITERION 3 
    Force calculations are defined. 

    SPECIFIC OUTCOME 4 
    Identify the strength and impact of materials on a structure. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    "Stress" is defined according to roofing terminology. 

    ASSESSMENT CRITERION 2 
    Tensile stress, compressive stress and bending stress are defined. 

    ASSESSMENT CRITERION 3 
    The combined stress index is defined. 

    ASSESSMENT CRITERION 4 
    The effect of forces on materials e.g. effective lengths for compression and tension is identified. 

    SPECIFIC OUTCOME 5 
    Describe the methods of connections used in the design and manufacture of trusses. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Methods of connections used in the design and manufacture of trusses are identified. 

    ASSESSMENT CRITERION 2 
    Methods of connections used in the design and manufacture of trusses are explained. 

    ASSESSMENT CRITERION 3 
    The limitation(s) of the connections used by the applicable system suppliers is identified. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner or moderating the assessment of a learner against the unit standard must be registered as an assessor with the relevant Education, Training, Quality, Assurance (ETQA) Body, or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Any institution offering learning that will enable the achievement of this unit standard must be accredited as a provider with the relevant Education, Training, Quality, Assurance (ETQA) Body, or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Assessment and moderation of assessment will be overseen by the relevant Education, Training, Quality, Assurance (ETQA) Body, or by an ETQA that has a Memorandum of Understanding with the relevant ETQA, according to the ETQA`s policies and guidelines for assessment and moderation.
  • Moderation must include both internal and external moderation of assessments, unless ETQA policies specify otherwise. Moderation should also encompass achievement of the competence described in the associated unit standards.
  • Anyone wishing to be assessed against this qualification may apply to be assessed by any assessment agency, assessor or provider institution that is accredited by the relevant ETQA. 

  • UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Knowledge considered critical to the successful achievement of this unit is covered in the specific outcomes and assessment criteria. 

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    This will be achieved when:
  • The qualifying learner identifies and differentiates between load definitions, the impact of the different structural forces and the methods of connections used in the design and manufacture of trusses. 

  • UNIT STANDARD CCFO WORKING 
    The qualifying learner works effectively with role players. 

    UNIT STANDARD CCFO ORGANISING 
    The qualifying learner is able to organise and manage him/her self and own activities responsibly and effectively in the process of gathering key data in the roof estimation process. 

    UNIT STANDARD CCFO COLLECTING 
    The qualifying learner collects and analyses dimensions to organise and critically evaluate information from roof maps, sketches and designs. 

    UNIT STANDARD CCFO COMMUNICATING 
    The qualifying learner communicates effectively using visual, mathematical and/or language skills with the various role players. 

    UNIT STANDARD CCFO DEMONSTRATING 
    The qualifying learner demonstrates understanding of the impact of structural forces on structures and the consequences of one's action as a roof truss estimator. 

    UNIT STANDARD ASSESSOR CRITERIA 
  • Anyone assessing a learner against this Qualification must be registered with the relevant ETQA as an assessor.
  • Any institution offering learning that will enable the achievement this qualification must be accredited as a provider with the relevant ETQA. Assessment will be overseen by the relevant ETQA according to the policies and guidelines for assessment of that ETQA, in terms of agreements reached around assessment and between various ETQA's (including professional bodies).
  • Anyone wishing to be assessed against this qualification may apply to be assessed any assessment agency, assessor or provider institution that is accredited by the relevant ETQA.
  • The options as listed above provide the opportunity to ensure that assessment and moderation can be transparent, affordable, valid reliable and non-discriminatory.

    For an applicant to register as an assessor or moderator of this qualification, the applicant needs:
  • To be registered as an assessor with the relevant ETQA.
  • To be in possession of the relevant qualification.
  • To have sufficient relevant experience.
  • To have the appropriate qualification to assess communication and mathematical literacy. 

  • REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Values:
  • The use of tasks and materials in the learning event plan should not discriminate against learners on any grounds prescribed in the Bill of Rights and Employment Equity Act and should promote the orientations outlined in the critical cross-field outcomes. 

  • QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  66370   Further Education and Training Certificate: Roof Truss Technology  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered" 
    2015-06-30  FPMSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    1. Mitek Industries SA ( Pty) Ltd 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.