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Karl Chung’s Final Report on Steel Truss System

Report_Steel Truss System_Karl Chung Pui Mau


Brief information about Truss System used in TST SOGO

Space Frame System

Space frame System is a lightweight rigid structure formed from interlocking of struts in a geometric pattern. Applying the concept of truss system in 3-Dimensional extend, so that the space frame is highly strengthened by the inherent rigidity of the triangle.

Flexing loads (bending moments) are transmitted as tension and compression loads along the length of each strut.

Loads Transfer

–      Systems w/ Symmetry about Two or Three Axes are Structurally Efficient

–      Column Supported Space Frame Behaves like a Concrete Flat Plate

–      Parallel Wall Supported Space Frame behaves like a Concrete One Way Slab

–      Peripheral Wall Supported Space Frame behaves like a Concrete Two Way Slab

Span to Depth Ratio

Horizontal Double Layer, Edge Supported

–  One Way,                   12:1

–   Two Way,                  15:1

–   Three Way,              20:1

–   Cantilever Spans,    9:1

Horizontal Double Layer, Corner Supported

–                                         15:1

Erection Methods

Scaffold Methods

–      Individual Elements are assembled in Place at Actual Elevations

Block Assembly Methods

–      Components are Pre- assembled on the Ground and Crane or Hoist Erected

Lift-Up Methods

–      Large Sections are Pre – Assembled on the Ground and Erected w/ Heavy Equipment e.g. Hydraulic Jacks

Types of Joint

–      Connector Plates

–      Hollow Balls

–      Solid Balls

–      Extruded Hubs

–      Welded Multi–Planar Gusset Plates

–      Multi- hinge

Steel Truss_SOGO_Draft Table of Content_Karl Chung

Steel Truss

1. What is Truss?
1.1 Truss as a structure
1.2 Types of Truss
1.3 Pros & Cons of Truss system

2. Steel
2.1 Steel as a material
2.2 Pros & Cons of Steel

3. Steel Truss in Practical use – SOGO
3.1 Brief Background of SOGO (site, function, etc)
3.2 Reasons for using Truss system
3.3 Kind of Truss system used
3.4 Pros & Cons of that kind of System

4. Elaboration of That kind of system
4.1 Other cases of using that system
4.2 Comparison
– Shape/ Form
– Scale
– Function
– Reason for them being used
– Cost (if available)
– etc…

4.3 Conclusion on the use in that Steel Truss System

5. Other common Steel Truss system
5.1 Cases in real life
5.2 Comparison
– Shape/ Form
– Scale
– Function
– Reason for them being used
– Cost (if available)
– etc…

5.3 Conclusion in which type is better

6. Conclusion
6.1 Carry out the importance of Truss in Structural extend
6.2 Situations that Truss can handle while others can hardly do the same
6.3 Any Critics on the shape/ material used/ etc… for improvement

7. Reference

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