h a l f b a k e r yOutside the bag the box came in.
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The buoyant arch pontoon bridge is a pontoon bridge similar to many others but with deep over-buoyant pontoons pushing the deck up into the shape of an arch, in permanent tension because the pontoons are so buoyant. So the deck doesn't go up or down; it's tied down to the river banks. Long crossings
can be made with a series of arches; where they meet the pontoon is anchored down to the river bed with big piles. Simple. Excellent.
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A nice bit of thinking, but the sections of a pontoon bridge are not usually rigidly fastened together. |
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BTW, one doesn't usually rate one's own idea as excellent. |
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Maybe there's two of him. |
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yes, like Dr. Harry and Mr. Mudd. |
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