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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Demonstrate an understanding of the impact of wind on roof engineering design 
SAQA US ID UNIT STANDARD TITLE
263775  Demonstrate an understanding of the impact of wind on roof engineering design 
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  10 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "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 
People credited with this unit are able to demonstrate an understanding of the impact of wind on roof engineering design.
Competent persons against this unit standard understand:
  • Explain the effect of wind on the roof of a structure.
  • Explain the effect of Terrain Category and Class of Buildings on wind force.
  • Calculate external and internal pressures on buildings with different shapes and heights. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    Communication and Mathematical Literacy at NQF Level 3.

    Recognition of Prior Learning:
  • Persons who are able to demonstrate workplace experience comparable or equivalent to the competence requirements of the unit standard will be given credit, in line with assessment processes. 
    		•

    UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Explain the effect of wind on the roof of a structure. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Wind is defined in terms of its strength, speed and direction. 

    ASSESSMENT CRITERION 2 
    Standard pressure on a roof structure is calculated according to engineering principles. 

    ASSESSMENT CRITERION 3 
    Additional loading of pressure from wind force is calculated according to engineering principles for different heights of buildings. 

    ASSESSMENT CRITERION 4 
    The need for incorporating additional design strength for wind pressure on a roof is described in terms of relevant safety criteria and durability. 

    SPECIFIC OUTCOME 2 
    Explain the effect of Terrain Category and Class of Buildings on wind force. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The type of terrain is described in terms of the effect it has in determining the force of wind. 
    ASSESSMENT CRITERION RANGE 
    Includes breaking wind force and increasing wind force.
     

    ASSESSMENT CRITERION 2 
    The class of building is described in terms of the effect it has in determining the force of wind. 
    ASSESSMENT CRITERION RANGE 
    Includes shape, direction and height of building.
     

    ASSESSMENT CRITERION 3 
    External factors that impact on the force of wind are identified and described in terms of their contribution in channelling or dissipating wind force. 
    ASSESSMENT CRITERION RANGE 
    Includes additional structures and/or natural features.
     

    SPECIFIC OUTCOME 3 
    Calculate external and internal pressures on buildings with different shapes and heights. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The concepts of external and internal pressure on buildings of different shapes and sizes are explained in accordance with general engineering practices. 

    ASSESSMENT CRITERION 2 
    Internal and external pressures to roofs of buildings are calculated in accordance with engineering principles. 

    ASSESSMENT CRITERION 3 
    Height differences are incorporated into calculations and used to justify building design concepts. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a candidate against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA.
  • Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Knowledge considered critical to the successful achievement of this unit is covered in the specific outcomes and assessment criteria.
    This includes:
  • The definition of wind.
  • The effect of wind on a building and its roof.
  • Natural wind breakers.
  • Natural wind channels.
  • The effect of height on wind force.
  • Internal and external pressures on a building and its roof. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and be able to deal with the concepts of external, internal pressures as applied to buildings with different shapes and heights. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others and in teams when calculating the effect of wind on the structural design. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage oneself and one`s activities responsibly and effectively when conducting relevant calculations. 

    UNIT STANDARD CCFO COLLECTING 
    Calculate the impact of external wind pressure. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematical and/or language skills when describing the effect of wind on the structure. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Understand the effect of wind speed, return period and height above sea level. 

    UNIT STANDARD ASSESSOR CRITERIA 
    To register as an assessor, an applicant needs:
  • Detailed documentary proof of educational qualification, practical training undergone, and experience gained by the applicant (Portfolio of Evidence).
  • A recognised assessor qualification.

    In particular, assessors should assess that the learner demonstrates an ability to consider a range of options by:
  • Measuring the quality of the observed practical performance as well as the theory and underpinning knowledge.
  • Using methods that are varied to allow the learner to display thinking and decision making in the demonstration of practical performance.
  • Maintaining a balance between practical performance and theoretical assessment methods to ensure each is measured in accordance with the level of the qualification.
  • Taking into account that the relationship between practical and theoretical is not fixed but varies according to the type and level of qualification. 
    		•

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

    UNIT STANDARD NOTES 
    The Outcomes that Learners achieve will be judged subject to these being achieved:
  • Within the standard time prescribed by the organisation.
  • Strictly according to the organisation`s work place procedures.

    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
    Elective  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.