Use statics in engineering


This unit describes the performance outcomes, skills and knowledge required to solve problems involving forces on statically determinate structures.

The unit of competency is applied by drafting personnel or technicians in a civil and structural engineering environment to perform calculations using statics and create explanatory drawings.

No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.

PREREQUISITE UNIT DCSBME604 Use basic mathematics in engineering


Elements describe the essential outcomes.


Performance criteria describe the performance needed to demonstrate achievement of the element.

1.    Determine reactions to structures and / or parts of a structure.

1.1.      Draw a free body diagram of components using standard industry symbols.

1.2.      Apply the equations of equilibrium to determine reactions.

2.    Determine forces in members of a truss.

2.1.      Apply the method of joints to determine the sense and magnitude of the forces in members of a truss.

2.2.      Apply the method of sections to determine the sense and magnitude of the forces in members of a truss.

3.    Construct shear force diagrams for loaded beams.

3.1.      Create a drawing to model loaded beams using standard industry symbols.

3.2.      Calculate the shear force at critical sections along the beam.

3.3.      Graphically represent the shear force at various positions along the beam using industry standards.

4.     Construct bending moment diagrams for loaded beams.

4.1.      Calculate the bending moment at critical sections along the beam

4.2.      Graphically represent the bending moment at various positions along the beam using industry standards.

5.     Determine the stress and strain in structural members.

5.1.      Calculate the stress in an axially loaded member.

5.2.      Calculate the strain in an axially loaded member.

5.3.      Calculate the extension of an axially loaded member

5.4.      Calculate the stress in a member loaded in shear

5.5.      Determine Young’s modulus for relevant load extension data


Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.


41981 Use statics in engineering is equivalent.



Assessment requirements for DCSSTA607 Use statics in engineering


To achieve competency in this unit a person must satisfy the requirements of the elements and performance criteria, foundation skills and range of conditions included in the unit.

The person must also:

  • solve written problems in statics using the most appropriate computational method
  • present information in a relevant format

Note: If a specific volume or frequency is not stated, then evidence must be provided at least once for each criterion.


To achieve competency in this unit, a person must demonstrate knowledge of:

  • Key concepts and principles in statics, including:
    • properties of scalar quantities
    • properties of vector quantities
    • resolution of vectors into component parts
    • resolving two or more vectors
    • definition of a force
    • properties of a force including magnitude, direction, line of action, point of application, sense (Tensile/Compression, push pull)
    • Newton’s laws of motion
    • moment of a force
    • couples
    • representation of common supports including fixed, pinned, roller and cable
    • conditions required for static equilibrium
    • equations of equilibrium
    • definition of shear force in terms of an internal action
    • definition of a bending moment in terms of an internal action
    • definitions of normal stress, normal strain, shear stress and shear strain
    • parts of the stress v’s strain diagram for mild steel
    • Young’s modulus


Assessment conditions:

All assessment must be completed in accordance with work health and safety standards.

When assessments are conducted remotely, invigilation software must be used to ensure authenticity of work completed.

Model answers or marking guides must be provided for all assessments to ensure reliability of assessment judgements when marking is undertaken by different assessors.

The candidate must have access to all tools, equipment, materials and documentation required.

Assessor Requirements:

Assessors must satisfy the assessor requirements in the standards for registered training organisation (RTOs) current at the time of assessment.

Assessors must also hold a tertiary qualification in engineering or related field.

Assessors must have worked for at least 3 years in industry where they have applied the skills and knowledge covered in this unit of competency.

The RTO must also ensure that trainers and assessors keep their industry knowledge up to date through ongoing professional development.

The RTO must take appropriate steps, as an ongoing procedure, to verify information about trainer and assessor’s qualifications, vocational competencies and current industry skills


Software/Hardware Used


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