The Flying Mast

(insane in the membrane...)

Inflatable Roof Collapse… WOW!

mmm… guess somebody miscalculated the snow loads here…

On Sunday 12th December 2010 the inflatable roof of the Metrodome ­– the Minnesota Vikings’ stadium – collapsed under extreme snow load. The extent of the damage is huge, but fortunately nobody was hurt. According to media report, more than 40cm of fresh snow came down in the heavy snow storms that heat the city’s area. This is not the first incident; the roof had already collapsed under similar circumstances in 1981, 1982 and 1983. The Vikings are therefore planning to build a new stadium and say goodbye in the next season to the Metrodome.

Watch here the spectacular collapse:

(Credit: foxsports via YouTube)

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December 21, 2010 - 4:56 PM Comments: Closed

BC Place’s New Roof – Follow Up

Here’s a video explaining the construction method of the steal masts and cables that will support the BC place’s new roof.

This is a link to a very interesting video broadcasted on the Discovery Channel, showing the 1:1 experimental model of two segments of the retractable roof, that was set-up in Sunnyside, United States. The model is meant to test the behavior under various weather conditions of what will be the world’s largest retractable roof.

Worth watching! For the interesting part skip to 09:50. link.

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November 11, 2010 - 4:35 PM Comments: Closed

So long Giant Marshmallow

The Iconic inflatable roof of the BC Place Stadium in Vancouver, Canada – aka the “giant marshmallow” – was finally deflated last may.

(Credit: John Bollwitt via Flickr)

(Credit: maplemusketeer via Flickr)

The existing pneumatic dome is to be dismantled and replaced with a partially fixed, partially retractable fabric roof as well as a transparent membrane façade.

When completed, this roof will be the largest cable-supported retractable roof in the world. The projected area of the retractable portion of the roof is approximately 6,700m², requiring a total of approximately 13,400m² of membrane material.

The project’s estimated budget is $458 million, and it is scheduled for completion by summer 2011.

The  new roof would cut energy costs at the stadium by one quarter, or about $350,000 per year.

A model of the new roof:

(Credit: Michael Kwan (Freelancer) via Flickr)

The project was designed by Stantec Architects Ltd, with structural engineering being provided by Geiger Engineers, New York, USA and Schlaich Bergermann & Partners, Stuttgart, Germany, supported by specialist consultants from Tensys.

The entire retractable roof and the fixed façade for the stadium is supplied by the Hightex GmbH in Germany – a world leader in the design and construction of retractable roof systems.

The fixed roof will be completed by FabriTec Structures, a brand of USA Shade & Fabric Structures – an award-winning full service
design/build organization specializing in tensile membrane structures.

From Hightex’s web site:

The contract will involve the fabrication and installation of the complete retractable portion of the membrane roof system in Tenara membrane, a woven, high translucency PTFE fabric, as well as the façade system to be fabricated from a transparent membrane with a light-controlling frit pattern. The design work will commence immediately, with completion planned to take place in mid 2011.

[…]

The new roof substructure consists of radial cable net and outer steel columns. The fabric roof is divided up into 36 fixed outer panels and 36 inner retractable segments. The outer fixed roof, to be the subject of a separate contract, has an area of about 34,000m². The inner roof will consist of a double layer Tenara membrane with an inflated inter-space to form “cushion” elements.

The cushions will be pre-stressed using hydraulic tensioning units and inflation via fan units. The retractable roof will be connected to the 36 radial cables by specially designed sliding and driving carriages. The deflated cushion will be stored at the centre of the roof in a membrane garage. To close the roof, the driving carriages will pull the membrane outwards radially towards the perimeter. The retractable roof is made of a highly translucent fabric which will allow the fabric to be folded without damage.

The new façade comprises some 6,000m² of transparent membrane panels using ETFE. The facade panels are pre-stressed using metal arches and are attached directly to the primary steel structure.

The deflation of the BC stadium – Time Lapse:

The deflation seen from the inside:

(Credit: miss604 via Flickr)

(Credit: miss604 via Flickr)

(Credit: miss604 via Flickr)

(Credit: miss604 via Flickr)

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October 20, 2010 - 4:00 PM Comments: Closed

The Japanese Pavilion for Expo 2010

(Source: designboom)

Japan Pavilion is a 24 meters high construction of double-layer ETFE cushions mounted on a lightweight steel frams. With its approximately 6,000m² plot It will be among the largest of all foreign pavilions at Expo 2010 Shanghai China.

More after the break.

Continue Reading “The Japanese Pavilion for Expo 2010″

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December 21, 2009 - 12:13 PM Comments: Closed

Hot Air

Hot_Air_3

(Credit: HotAir2009 on Flickr)

HOT AIR is an iconic head-shaped inflatable and inhabitable monument, Designed by Anca Trandafirescu, an architect and assistant professor in architecture at the University of Michigan, to commemorate the 20th anniversary of the fall of communism in Romania.

Hot_Air_2

(Credit: HotAir2009 on Flickr)

The idea behind Trandafirescu’s design of an anonimous head of an overthrown statute is that “the contradictions of optimism AND instability inherent in Romania’s political change are reflected in the mass, material, and construction of a symbolic image filled with HOT AIR.”

The project was mounted on Noveber 3-7 2009 in Piata Victoriei, Timisoara, Romania where the first large demonstrations in the country took place and eventually led to the fall of the dictatorship.

Hot_Air_4

Hot_Air_5

(Credit: HotAir2009 on Flickr)

Hot Air was realized in association with the city ’s Young Artists/Young Democracy expo and the American-Romanian Music Festival with the support of the city of Timisoara, Romania, the University of Michigan through the Weiser Center for Emerging Democracies, the Center for Russian and Eastern European Studies, and the Taubman College of Architecture and Urban Planning.

Hot_Air_1

(Credit: HotAir2009 on Flickr)

The designer herself with the assistance of Le Nguyen built this impressive inflatbale structure manualy. The patterning and cutting of the polyethylene plastic sheets was done exclusively by hand, using physical models, and the welding was done with a simple household iron.

chromocranium from HOT AIR 2009 – Anca T on Vimeo.

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December 1, 2009 - 1:06 PM Comments: Closed