Commercial timber building design project

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Reference no: EM132529645

49136 Application of timber in Engineering Structures - University of Technology Sydney

Design Assignment

This assignment covers the main design competencies required for undertaking a commercial timber building design project. To complete the assignment, students are expected to put considerable amount of work including research to find relevant information to complete the design successfully.

You are required to undertake the detail structural design of a 40m x 24m office building (2 storey) located in Sydney (Wind Terrain Category 3). Details of the required building plan and elevation is given in the attached drawing. The structural importance of the building is classified as normal. The design brief will require you to prepare options for each design stage and make recommendation on the preferred option.

You must design the building to conform to AS/NZS 1170 for gravity and wind loads, to meet SLS and ULS criteria. Since the wind loads are more critical than seismic, you are not required to design for earthquake events.

The available material is generally classified as (i) Grade 11 pine LVL, either 45mm or 63 mm thick - sourced from Australia or New Zealand and (ii) 3, 5 or 7 layered CLT panel options are available from XLam New Zealand.

You may assume that the foundations and basement masonry walls / retaining walls will be designed by others. The structural system for the building is essentially post and beam and / or portal construction with appropriate lateral bracing. All other walls are non-load bearing and as such, you do not need to design the infill walls.

You only need to design one of the design alternatives for each step and use it in the following design steps e.g. you may choose CLT floors and proceed to design a beam-column framing system to support the CLT floors. Similarly, you only need to design one type of connection.

Flooring - 1 option required (simply supported single span):
• Floors must be designed to resist an imposed load of 3 kPa distributed loads, in conjunction with a 3.5 kN concentrated load
• Option 1 - a Timber composite floor spanning up to 8 m
• Option 2 - a CLT floor spanning up to 8 m
• All floor options must be designed for a deflection limitation of span / 300 for a short term SLS load of 0.7 Q.
• Design suitable floor support beams (spanning between columns / portal frames) to support the main floor
• Provide specification / details for acoustic / fire separation to meet a 60 minutes FRL fire rating

Framing - 1 option required:
• Option 1 - floor beams, columns and bolted roof trusses. You only need to design the standard truss- do not worry about the corner ridges.
• Option 2 - a gable portal frame (with floor beams as required) over the entire building. Whilst the architectural drawing gives guidance on the roof pitch, variation to it is acceptable as long as the roof height is not exceeded. You also have the flexibility to decide on the column / frame spacing.
• Design suitable lateral bracing in both directions to resist horizontal wind loads

Connections - 1 option required:
• Design connections for both framing options, noting the portal connections must be moment resisting and the truss connections must be bolted.
• Design all floor to beam and beam to column connections

Attachment:- Application of timber in Engineering Structures.rar

Reference no: EM132529645

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