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Assessment Name
Assessment 2 – Test – Truss Analysis and Design Report

Test Available from Test Due
12 pm Adelaide Time on Saturday 20th November 2021 12 pm Adelaide Time on Tuesday 23rd November 2021

35% of the total grade for this course

File Type to submit
One *.doc or *.docx file, with a maximum file size of 100MB

Assessment 2 Test UO Structures


It is beneficial to familiarise yourself with the relationship between the assessment and the course objectives.

CO1: Select and apply mathematical procedures to determine forces acting on structures and determine costs and use this to justify design decisions.
CO2: Analyse and design physical structures and representations of structures to allow the calculation of support reactions, shear forces, bending moments and deflections.



2 Questions
CO 1, 2
12pm Adelaide time, Tuesday Week 10
3 days to complete and submit


In this test, apply the relevant concepts covered in this course. In the first question, design different members of a truss, and in the second question determine loads, bending moments, shear forces and deflections in a building structure.

Where relevant, reference the relevant Australian Standard Loading Codes AS1170 and ASI Design Capacity Tables for Structural Steel.

Resources from weeks 1 – 10 will be a valuable reference.


Test Conditions apply and there is to be no discussion with anyone else and no questions asked of teaching staff for the duration of the test. Late submissions will not be accepted.
The Grade and Feedback for Assessment 1 Part B will be returned after both the Test (Assessment 2) has been submitted and the Test deadline has elapsed.
If handwriting answers, the handwriting must be legible and pages are to be scanned, not photographed.

o  Preferably, type the calculations using equation editor in MS Word.

UO Structures 1 Test Instructions Read this page in detail

The Test is out of 100 marks and is worth 35% of overall course grade

Answer All Questions

No discussion is permitted with anyone, regarding the Test, until grades and feedback for the Test have been released.

Late submissions will not be accepted.

Except for the forums, all other course resources are available for your use for the duration of the test.

Word document submission only

Excel spreadsheets and software analysis tools will not be accepted for submission

If handwriting calculations, the handwriting must be legible and pages are to be scanned, not photographed.

Preferably, type the calculations using equation editor in MS Word.

·       Where relevant, diagrams must be included with calculations (e.g. Free body diagrams, tributary areas)

and these can be hand drawn and scanned in.

Clear and informative diagrams can help the assessor follow your calculations and reasoning.

For full marks for any part of a question, working must be displayed and units must be correct at every step of working.

For example, in Question 1 Part A the correct support reactions with no working or free body diagram(s) to show how the support reactions were obtained, will score zero for that part.

The marks for each part are underlined in bold font

Answers are to be correct to 1 decimal place.

For example, an answer of “The force in member YZ is 125.367 kN (Compression)” can be written as

The force in member YZ is 125.4 kN (Compression)

For example, an answer of “The force in member YZ is 300.00 kN (Compression)” can be written as

The force in member YZ is 300 kN (Compression)

The Design Properties and Capacity Tables can be found in the Assessment 2 Section on the Course website.

You will need to access the Australian Standards, especially AS/NZS 1170.1:2002 via Techstreet at the UniSA Library.


Use Figure 1, a pin jointed steel truss with bolted connections and the values presented in Tables 1 and 2, as well as your mathematical thinking and reasoning to respond to the following questions.

Ignoring the self-weight of the members, determine the support reactions. 10 marks

Ignoring the self-weight of the members, determine the force in the three members BC, BE, CD.

15 marks

Design members BC, BE, CD. Use Equal Angle (EA) Sections for members in Tension and assume the member is bolted with 1 Hole in Leg. Use Square Hollow Sections (SHS) for members in Compression. For zero-force members use SHS 65x65x1.6. 12 marks

Determine the stress, strain and elongation/shortening of member BC (Assume Esteel = 200,000 MPa)

8 marks

Design the bolts for the connections on members BC, BE, CD. Use the same “Grade:8.8” bolt size for all connections. That is, whatever bolt size is selected on one member, needs to be used on the other two members. 9 marks

The steel price is $15 per kg, and the bolt price is provided in Table 2. Determine the total cost of the material to build members BC, BE, CD. 6 marks

Remember to include free body diagrams at part (a) and part (b) and your answers must be consistent with the orientation of the truss presented in Figure 1.

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