Quote:
Originally Posted by Empire
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There are two stadiums in this photo. The one in the foreground looks very modern but also expensive (I could be wrong since it is fabric). The one in the background looks more sturdy. So I kind of prefer the one in the background.
In my head, I have this image of a a large canopy that can be connected to the edge of the roofs of the two stands for concerts and other events but
not football. The reason is, that along the midpoint of the football field (lengthwise) would be 10-12 support columns about 90 feet high (but not extremely heavy) which would be like tent supports that would have anchor points on the field (under the turf) that would support a canopy for concerts and events when the field is not required for a sporting event. This would be like a Shrinders circus tent (Big Top Tent). Like this but somewhat bigger:
http://www.swamptrust.org.uk/BigTop/Big%20Festival%20tent%20from%20swamp%20Circus%202008.jpg. So instead of an expensive retractable roof that would cost a fortune, it would be a canopy that could be set up in a matter of hours or a day for special events. I am sure that this could be done relatively inexpensively, although it would require some design work.
If the roof for the stands is supported by 6 masts (exterior columns, 3 on each side) then the 10-12 support columns on the field might not be required to support the canopy since it could be supported by the externals masts). Similar to the front stadium in the link that you provided of the Coca Cola Park. I wonder if there is a way to do it without them being so obvious. This type of roof structure is becoming more prominently used, look at this rendition of the BC Stadium new roof
http://3.bp.blogspot.com/_O4D2cm1fTKc/Sd...0Vancouver%2520skyline%2520Rendering.jpg