Constructing Logbook WEEK 6 Jiawei CHEN
Tutorial Activities (In-‐Situ presentation) •
Site : Ascot Vale
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Using timber frame system as the frame of the house
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Triple glasses for windows
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The retaining wall combined with metal “I” beams and timber beams with fixed joints to stabilize the whole system.
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Site : South Melbourne
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Wall Systems:
External: Masonry veneer construction, internal: stud wall framing •
Floor System:
Steel used as primary beams, prefabricated wood steel joists used as lumber •
Roof Structure:
old truss used as primary load bearing structure.
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Site: North Melbourne
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Material used for studs in wall framing: pine wood
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Concrete wall (filled with cement and steels every 2 metres)
Tutorial Activities (Model presentation) • Pins were used to connect the steel trusses for Pin
Pin
Pin
Pin
Pin Pin
Figure 1
the purpose of stabling the structure of the canopy model. Pins serves as bolts in the canopy model. In the actual canopy, steel truss were connected to each other by bolts. Bolts served as pin-‐joints in the canopy, which makes the connection rigid enough to carry the load .(Please refer to Figure 1 & 2))
Figure 2
Tutorial Activities (Model presentation) The spine truss carries the load of trusses and cantilevers connected to the spine truss. The connection between spine truss and canopy cantilevers is bolt connection. The canopy cantilevers, which carry the load from the canopy and the load of material itself, are bolt jointed at the spine truss. (Please refer to Figure 3&4)
Canopy cantilevers
Canopy cantilevers SPINE TRUSS
Figure 3
Figure 4
Tutorial Activities (Model presentation)
Steel bracing
Steel bracing
• In the model, the trusses are connected by stick tapes. In the actual canopy, the steel trusses are bolt-‐ jointed. • The steel bracing in the canopy helps to relieve the load taken by main trusses.
Summary of Learning-‐loop • Plate structures: Rigid, planar, usually monolithic structures that disperse applied loads in a multidirectional pattern, with the loads generally following the shortest and stiffest routes to the supports. Can be envisioned as a series of adjacent beam strips interconnected continuously along their lengths • Ferrous: iron (relatively cheap) • Non-‐Ferrous: all other metals (generally more expansive), less likely to react with oxygen • Alloys: combinations of two or more metals • Water related damage: Oxidation Corrosion • Protection against water to reduce corrosion: - avoid prolonged exposure to moisture - seal against moisture - chemical treatment • Flat roofs: pitch 1 degree to 3 degree • Pitched and sloping roofs: pitch >3 degrees low slope <15 degrees, medium slope 15 to 30 degrees, high slope 30 to 45 degree • Concrete roof • Structural steel framed roofs: Flat structural steel roofs Sloping structural steel roofs • Trussed roofs • Light framed roofs: Gable roofs Hip roofs
• •
Glossary
Rafter:
the main structure members in the frame of roof system.
• Purlin: “a horizontal beam that provides intermediate support for the common rafters of a roof construction.” (Please refer to Figure X). (Collinsdictionary.com, 2014).
• Cantilever: a structural element supported at only one end. (Newton, 2014). •
Portal frame:
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A type of roof frame consist of a series of braced rigid frames with purlins for the roof and girts for the walls. (Please refer to Figure X). (Newton, 2014).
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Eave:
The overhanging lower edge of a roof. (Please refer to Figure X). (Ching, 2013 & Roof ventilation board,2014).
• Alloy: a combination of 2 or more metals. (Newton, 2014). • •
Soffit: “the underside of an overhanging roof eave”. (Ching, 2013).
Figure X Figure X
• Top chord: “ principal member of a truss extending from end to end and connected by web members.” (Ching, 2013).
Figure X
Figure X
Bibliography
Ching, F.(2013). Building Construction Illustrated. Wiley & Sons, Inc. Collinsdictionary.com,. (2014). Collins English Dictionary | Always Free Online. Retrieved 11 September 2014, from http://www.collinsdictionary.com/dictionary/english/purlin?showCookiePolicy=true Collinsdictionary.com,. (2014). Collins English Dictionary | Always Free Online. Retrieved 11 September 2014, from http://www.collinsdictionary.com/dictionary/english/eave?showCookiePolicy=true Keskin Consulting Structural Engineers,. (2014). Example 4: Portal Frame & Overhead Crane. Retrieved from http://www.keskin.co.uk/commercial4.html Lewis, M. (2014). Spanning Spaces. Retrieved from https://www.youtube.com/watch?v=Zx4tM-‐uSaO8&feature=youtu.be Newton, C. (2014). W06_c1 Roof Systems Retrieved from: https://www.youtube.com/watch?v=q5ms8vmhs50&feature=youtu.be Newton, C. (2014). W06_m1 Introduction to Metals Retrieved from: https://www.youtube.com/watch?v=RttS_wgXGbI&feature=youtu.be Newton, C. (2014). W06_m2 Ferrous Metals Retrieved from: https://www.youtube.com/watch?v=SQy3IyJy-‐is&feature=youtu.be Newton, C. (2014). W06_m3 Non Ferrous Metals Retrieved from: https://www.youtube.com/watch?v=EDtxb7Pgcrw&feature=youtu.be Roof ventilation board,. (2014). EAVES. Retrieved from http://www.roofventilationblog.com.au/eaves-‐gables-‐worries/169/