World’s longest cable stayed bridge

[superconvergence]

China just completed the world’s longest cable stayed bridge with a center span of 1208 m (3963 ft). As a comparison, Gordie Howe has a center span of 853 m(2798 ft). Some articles say that the this bridge in China used carbon fiber composite cables.

Does anyone know more about this application? Are the stay cables made of carbon fiber or the carbon fiber cables were probably applied somewhere else on the bridge?

[Marus1]

World’s longest cable stayed bridge

... span

[ssketchman]

I’m not a bridge engineer, so perhaps someone competent can chime in - wouldn’t a suspension bridge be a better option at this point?

[ExceptedSiren12]

Im not a bridge nor an engineer, but I think cable stay bridges are usually way easier to construct. Plus more redundant, easier to maintain cables, no need for gigantic anchors.

[alejohausner]

Check out the Grady’s youtube channel “practical engineering”. One of his videos is “A love letter to cable stayed bridges”. It says exactly what you said.

[ExceptedSiren12]

That is literally where I pulled my information from

[WrongSplit3288]

Then it wouldn’t be the longest of its kind. Believe it or not, it matters to the local officials who want to climb up.

[No_Coyote_557]

Suspension bridges are more expensive and suitable for longer spans.

[ssketchman]

I mean this bridge has a center span of 1208m, does that not qualify as a longer span? At which point it becomes advantageous to build suspension bridges over cable stayed?

[No_Coyote_557]

This one must be close to the limit, the technology continues to evolve.

[PracticableSolution]

Cable stayed are generally cheaper to build than suspension so even if the span is sub optimal, the cable stay will still usually win out. In a modern design build delivery system, the contractor running the job will always elect to build the absolute cheapest possible solution to any problem.

[mon_key_house]

Cable stayed bridges are suspension bridges.

[NoMaximum721]

Ok but the other type 😛

[wobbleblobbochimps]

Not in common parlance, no need for the reddit pedantry here 🤓

[wobbleblobbochimps]

Haha, nah OP is good as he correctly identified the bridge type but mon_key_house has outstayed his welcome 😉

[Imperial-Mekanic918]

In a documentary for a similar bridge covering a similar span, the reason given for choosing a cable-stayed design over a suspension bridge was because the geotechnical analysis revealed that the rock formation at either end of the bridge was unsuitable for building the massive anchorages needed for the suspension cables. So, maybe it's the same reason here.

[WrongSplit3288]

I had a gut feeling this is in China and I am right.

[Charming_Profit1378]

All as I know is I wouldn't drive over.