Assist in the design of one column and one beam member for a domestic shed
UO Structures 2 ACTIVITY DESCRIPTION
DESIGN PROJECT: DESIGN DIFFERENT ELEMENTS OF A DOMESTIC SHED
This design project is particularly focussed on developing an understanding of structural load paths and the design process. To successfully complete this project you will be required to design different structural members of a domestic shed.
1. PROJECT EXTENT
For the following structural elements in a domestic shed:
i. Design Rafter R2
ii. Design Column C4
The following standard member abbreviations have been used in this handout: UB = Universal Beam UC = Universal Column
Please note that the following items will not be included in your project:
• Purlin Design • Connection design • Bracing design • Footings and floor slab • Earthquake design
2. DESIGN PARAMETERS
The following details are to be read in conjunction with Figure 1, Figure 2 and Figure 3 a. Dimensions Span (width of shed) = 8m
Eaves height on higher side = 5m
Overall shed length = 14m
Bay spacing = 7m
Roof pitch = 5’
b. Wind Loads
Wind Region = B
Wind Terrain Category = 1
Shielding = No Shielding
Topographic effects = T5
c. Roof sheeting is to be Lysaght Trimdek
d. Assume any Lysaght Zed cross section for purlin. However, Purlin spacing does need to be calculated and also ensure the spacing is within the relevant limit for Roof Sheeting.
e. Ceiling & Insulation - research and make selection
f. Columns and Rafters - UC (or UB) for Columns and UB for Rafters are suggested
g. Please note: the shed will be designed as a braced box structure, which means that all connections will be pin ends.
Figure 1: PLAN VIEW OF SHED
Overall Shed Length-------h
Figure 3: WEST ELEVATION OF SHED
3. DESIGN CODES AND METHODS
The design shall conform to the following Australian Standard Codes (the most recent edition except AS40S5)
Structural Design Actions - General principles Permanent. Imposed and Other Actions Wind Loads for Housing Use AS4055-2012 Steel Structures
Lysaght Zeds and Cees User Guide shall be used for Purlin selection.
Australian Steel Institute Design Capacity Tables to be used to select Rafters and Columns. You are not required to design these from first principles.
4. WRITTEN REPORT
• Explain and support design choices with credible academic and/or professional sources of information.
o Present a summary of design criteria and member sues in tabular form
o Calculations must be typed as handwritten calculations will not be considered for assessment
Include calculations to demonstrate your mathematical thinking and reasoning
• Units In calculations must be present and correct at every step of working
• In problems that reflect a physical reality calculations without correct units are meaningless
• Remember: A Vector (e g. Force) has both magnitude and direction
• Note: The three dot points above are all emphasised in the pre requisite course. UO
Structures 1 and it is the expected standard of work submitted for UO Structures 2.
• Discussion and justification of design chosen: evaluate the design solution which may involve analysing the strengths and weaknesses, including comments on the design of central rafter and column compared to the end rafters and columns. Apply the knowledge you have gained in this course and from ‘Structures 1‘ to justify your thinking and support your ideas with credible sources (academic or professional).
• Drawings - Include sketches and drawings that are clearly labelled E g Figure 1: and in reports figures are generally labelled below the figure and tables are generally labelled above the table
S. FURTHER DESIGN CONSIDERATIONS AND ADVICE
Watch and Read, In detail, the relevant Course Resources.
• For Design of elements of the roof, some lengths (e g. R2) will be marginally longer than the plan dimensions due to the roof pitch
o Use the plan dimensions In these cases to simplify calculations
• Permanent Loads (Dead Loads) - allow for ceiling, sheeting, insulation, self weight of structural elements.
• The assumptions for dead load
o Where unknown loads exist, like insulation, find a reference to support the weight chosen.
• Imposed Actions (Uve loads) - refer to AS 1170.1 Clause 3
• Wind Loads as per extract of AS 40SS
o For the Net Pressure Co-efficient use ‘Roof ¦ General Areas
• To simplify calculations use the provided lengths, widths and heights
o For example, when calculating wind loads ignore the outer half width of the of UC for Columns Cl,
C2, CS and C6
• Assume the Rafter Is level (Ignore the roof pitch) when for example, determining a bending moment
frame Design Loads
• load Cases to consider as per 1170.0
7. REQUIREMENTS FOR A SUPPLMENTARY PASS GRADE
Calculations must be typed as handwritten calculations will not be considered for assessment
CALCULATIONS TO SUPPORT D€ SIGN CHOICES identifies determinants of design choices relevant to structural features of a domestic shed, poses credible design solutions COL Determines and dearfy eapiains wind load, suction and pressure, on the builduig with minor errors in cacutatjor of wind speed and net pressure coe+^cient. Accurately determines design loads and design domestic shed central rafter, uses Design Capacity Table to select the most suitable members Deternwnes auai loads and bending moments to design a typcai column supporting central rafter, uses Design Capacity Tabic to select the most suitable members errors m calculation and correct units are present at every step of every calculation
OtSCUSSOM Discusses. evaluates and justifies design choices using credible sources. linking to drawings and mathematical calculations. C01 andCO4 Clearly summarises the practical application of design choices and discusses in detail why me selected members are the best design opt or s Demonstrates analytical and entice thinking thrown making relevant wiki to design capacity tables, relevant construction industry sources and/or uses sketches to clarify ideas to the reader
Quality Sources and Evidence C01 and CO4 Research evidence composes sources that are relevant and applicable to Australian standards Referencing rs almost fault lew m tn teat ertaton and reference list w«h few errors (Harvard style)
CPIandCO4 AA lectors of the report display a professional presentation, including informative tMle/btle page well structured introduction, report is cohesive and connections are mode between each section, appropriate report writing style (third person, academe language. links ten to chagramsl. correctly labeled sketches, dose adherence to formatting requirements.