If you suspend a bridge, you build the bracing one way.
If support a bridge from below, you brace it a different way.
All the stresses are totally different depending upon where you 'hang' it from.
So, they designed it to hang from cables above, so that was the strong design of the bridge.
Someone with a big ego got it pushed through the idea of supporting it from below, first on big moving jacks (a whole 'bother set of stress to be moving to design for), and then from different points below from the ends and middle.
But a hanging bridge is very, very weak from below, those stresses had to be about impossible to calculate on the type of design this hanging bridge was. The ends and middle want to sag out and down from the load bearing points that are not properly beefed up, and from that backbone of supports that are angled the wrong way now when you try to carry it from -below-. Everything is opposite and backwards when you try to support it from below.
Bet there are some lowly engineers will be found eventually that were saying this won't work, it's not designed for those types of pressures, but were bypassed......
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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