https://www.youtube.com/watch?v=PSxihhBzCjk
Some ETFE related links below, and Wiki article on the Forsyth Barr Stadium, the first to use a full ETFE roof with natural grass turf growing inside. I'd like to see something like this for the Tampa Bay Rowdies SSS (soccer specific stadium) on the site of the current Al Lang Stadium, only better than Forsyth Barr Stadium, of course, and better than any current or planned SSS in MLS. Maybe some day all SSS in MLS could have roofs like this, and MLS could have any soccer calendar it wanted, winter months included.
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(Follow link for full article.)
New roof will help save jungle exhibit at Sedgwick County Zoo
http://supportyourlocalfootballclub.blogspot.com/2016/10/new-roof-will-help-save-jungle-exhibit.html
http://www.kansas.com/news/local/article1261939.html
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(Follow link for full article.)
New roof technology could benefit a new Rays stadium
http://supportyourlocalfootballclub.blogspot.com/2016/08/new-roof-technology-could-benefit-new.html
http://www.tampabay.com/features/humaninterest/new-roof-technology-could-benefit-a-new-rays-stadium/2223706
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(Follow link for full article.)
ETFE
https://en.wikipedia.org/wiki/ETFE
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(Follow link for full article.)
Forsyth Barr Stadium
https://en.wikipedia.org/wiki/Forsyth_Barr_Stadium
The Forsyth Barr Stadium is a multi-purpose stadium in Dunedin, New Zealand.[3][4] At various stages of development it was also known as Dunedin Stadium or Awatea Street Stadium,[5] or its non-commercial official name during the 2011 Rugby World Cup and 2015 FIFA U-20 World Cup, Otago Stadium.[6] It is also known colloquially as 'the glasshouse' due to its resemblance to a horticultural hothouse. The stadium was opened by New Zealand Prime Minister John Key on 5 August 2011, replacing Carisbrook as the home stadium of the Highlanders team in Super Rugby and the Otago in the domestic ITM Cup. The stadium hosted four matches of the 2011 Rugby World Cup, and after hosting Elton John in November 2011 hosted more major music events in April 2013, when Aerosmith and Paul Simon performed in New Zealand for the first time.[7][8]
. . .
Design
The stadium was designed by Populous and Jasmax in a joint venture, and is the world's first fully enclosed grassed (though strengthened by synthetic grass fibres from Desso GrassMaster) stadium[citation needed] since the original grass field of the Astrodome in Houston was replaced in 1966 with what would be known as AstroTurf. The stadium roof was constructed with a clear ETFE roof supplied and installed by the firm Vector Foiltec, the same material as used at Allianz Arena in Munich and the Water Cube in Beijing.
The stadium was designed as a versatile venue, and is expected to be able to host a range of events including sports (rugby union, rugby league, football, basketball, netball), concerts, trade fairs and other large scale events. The use of relocatable seating allows for flexibility to suit a range of event requirements. Due to size constraints, some sports (such as cricket, a popular sport in New Zealand) are unable to use the stadium.
It has a maximum seated capacity of 30,748 in a full sports mode, and capacity in excess of 36,000 for concerts There are permanent stands in the South and North with removable seating in East and West Stand areas. The West Stand Area, officially called the Mitre 10 Mega Stand, is also known as the Zoo and is popular with the student population[citation needed].
Roof
Internal roof height at centre line: 37 metres
Highest observed rugby kick 29.4m
External roof height 47 metres (equivalent to a 12 storey building)
Football goal posts: 16 metres
The roof is covered with 20,500m2 of ETFE (ethylene tetrafluoroethylene) transparent roofing material (also used in the Eden Project, England and the Beijing Cube, China). This roof should have been angled to face north to optimise sun in Southern Hemisphere winter, however it was constructed facing a north-east direction. Rainwater is collected from the 20,500m2 roof surface and recycled to irrigate the pitch. The roof, supported by 5 steel trusses each spanning 105 metres, is capable of supporting the weight of a car. The main truss (South Stand) is 130 metres long and weighs 390 tonnes.
Turf
Real grass is strengthened by synthetic grass fibres injected deep into the soil. This increases the hard-wearing capability, allowing 3 times the use of natural grass field. The turf is serviced by 2.5 km of drainage, 15 km of irrigation and 40 automated sprinkler heads. The turf consists of three different types of seed, 3200m3 of sand, soil and compost in three different layers.
Due to the perceived high cost of maintaining the turf, proposals have been made to replace the grass/artificial turf with a 100% artificial turf,[9] which would limit the attractiveness of the venue for high earning events like rugby test matches (for which the stadium was initially proposed to replace Carisbrook).
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