Other Structural Forms - Cablenets, Glazing, Facades, Spaceframes

The LSAA has groups of members interested in cablenets, high technology glazing and facades.

In fact one main reason for the creation of the LSAA  from the MSAA was to cater for the growing number of projects which involved large glazed areas being supported by pretensioned cable truss systems or cablenets.

In modern times, when the overall energy usage for the life of a building is taken into account, the use of high technology facades will become more important. There is also a growing use of "green facades" or vertical gardens.

The traditional spaceframe structures are becoming rarer - those with many small elements that are man-handled and connected together on site. Labour costs and erection times are now outweighed by fewer larger assemblies that can be installed quickly by cranes.

The LSAA would welcome articles and links to projects in this category. 

Jagged Edge - Queenstown NZ

PROJECT DESCRIPTION

An Atypical design and Construct project involving a house for a confidential client. The design was prepared and presented as a “Design+Construct” package that was purchased as a package by the Client. The Builders Team had prepared preliminary documentation based on advice from specialist consultants and Architects. The design was then proposed for sale to the market as a complete delivery vehicle.

The project is a residential building built on the side of hill with an impressive vantage point. The main goal of the design is to maximise transparency to optimise the view.

The bedrock of the mountain is used for the foundation of the roof which is suspended projecting towards the lake. The project utilises tension cables and clamps to support the glass façade panels.

Overview of Cablenet Structures

The modern cablenet structures burst on the international scene with the Expo 67 German Pavilion constructed in Montreal, Canada.

This was a larger version of the cablenet roof prototype designed by Frei Otto's team and used now to house the IL at the University of Stuggart.

Australia can bost a very early cable net structure in the Sidney Myer Music Bowl in Melbourne. 

The next structure, and the most famous is the impressive stadiums for the Munich Olympics designed by Frei Otto.

Highly stressed cable trusses are also used to support flat glass surfaces now common for facades.

Whitten Oval

Entrant:            Ronstan – Contractors
Location:           Barkley St, Footscray Vic
Client:               Western Bulldogs, Whitten Oval
Architect:          Peddle Thorp
Struct. Eng.:     Irwin Consultants
Builder:            Salta
Fabricator:        Ronstan

 

Taronga Zoo Chimpanzee Enclosure - Sydney 

APPLICATION OF PROJECT:   Separation Enclosure for Chimpanzees.

The Taronga Zoos’ chimpanzee troop is one of the largest captive groups in the world with recognized wild behavior patterns and a sophisticated social hierarchy.  With its population including four maturing sub-adult males jockeying and promoting themselves within the group, the zoo cited a need for the construction of a fully enclosed and semi-transparent separation paddock within the chimpanzee exhibit to allow the chimpanzees to be easily divided as needed, without moving them to an entirely new location, and thus avoiding potential commotion.

The Seperation Enclosure:

  • facilitates the introduction of new chimpanzee females to maintain the genetic pool.
  • provides the necessary infrastructure for the current troop management strategy and philosophies.
  • permits the troop to remain outside in summer unsupervised where this was previously not possible.
  • maximizes viewing time for the public.

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Perth Zoo Wetlands & Penguin Enclosure

Entrant:                           Structural Dynamics Australia

  • Category:  4                ID Number:  4966

  • Location:                     Perth Zoo, WA

  • Client:                         Government of WA - Department of Finance

  • Completion Date:          January 2012

Credits:

  • Architect:                     Pritchard Francis

  • Structural Engineer:      Pritchard Francis

  • Builder:                       The Slatter Group, WA


APPLICATION OF PROJECT:    Zoological Enclosure

 4966 30

PROJECT DESCRIPTION:
Structural Dynamics was contracted by The Slatter Group WA to assist with the design, material selection/supply and installation of a lightweight zoological enclosure that would cover an area of 90 meters long, 34 meters wide and 10 meters high.

The enclosure was covering two existing exhibits at the Perth Zoo, namely the penguin display and wetlands area, so needed to have minimal impact on the existing flora and infrastructure.

Pritchard Francis had already conducted the majority of the structural design and calculations of loads - Structural Dynamics assisted both The Slatter Group WA and Pritchard Francis with final material specifications to meet demanding requirements.

With such a large open enclosure that needed to be visually appealing for visitors as well as transparent for the exhibits inhabitants the challenge was to specify materials that met demanding load specifications but at the same time provided a light weight alternative that had minimal visual impact on the surrounding exhibits.