Title text:
Wind stress? Don't be silly. When has wind stress ever been a problem for a suspension bridge?
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Source: https://xkcd.com/3279/
this post was submitted on 31 Jul 2026
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At 99°C (210°F) the lift power of hot air balloon is 0.25 kg per m³. Pillars supporting a four kilometre long suspension bridge section are under 200 MN vertical load, or 20 million kg. The air balloon would have to be 80 million m³ large, or 534 m (⅓mi) in diameter.
So you're saying its possible.
Doesn't even sound that unrealistic to be honest.
Does that mass include the containment and support structure for the balloon itself?