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Loei: Tourist skywalk feels like it's shaking - not to worry, says Thai engineer

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Look at some of the videos of bridges swaying.  They were designed for it.  Or have you ever gone to a stadium and felt it moving? So it does seem like a plausible explanation.

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  • Foreigners are banned from working as engineers in Thailand, because locals can not compete in this field. Let that sink in... 

  • There you go...nothing to worry about...

  • If they say not to worry..... Then its time to worry. Typical response here, after it collapses, engineer will say, it was all a misunderstanding.

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1 hour ago, Blue Muton said:

The same as London's Millennium Bridge, not a Thai engineer in sight there.

And do you know the history about that bridge when it first opened?

It had a pretty bad flaw in it.After people started to walk on it it started swaying and they had to close it down and do some upgrades.

It was something to do with frequency waves(please someone give me the right term)and once the frequency waves start they get stronger and stronger if they have the design wrong....so anyway a few modifications and the bridge was safe!

Don't confuse buildings that 'sway' and those that tremble. Modern high structures are built to so that in high winds the will bend and not fracture. However, if buildings vibrate then it means that either damping measures are inadequate (or have become inadequate) or that frequencies of vibrations are above the materials frequency range, that is simply, the wrong materials used for the job. Usually an elementary example is that of walking on floors, which if memory serves produces something like 1.5 to 3 Hz. So the floor should be constructed of materials that vibrate above 3 Hz. I would hope that this is the problem here. If it isn't...oh dear me. 

6 hours ago, Flugg said:

Foreigners are banned from working as engineers in Thailand, because locals can not compete in this field. Let that sink in... 

Nonsense.

1 hour ago, martin3 said:

And do you know the history about that bridge when it first opened?

It had a pretty bad flaw in it.After people started to walk on it it started swaying and they had to close it down and do some upgrades.

It was something to do with frequency waves(please someone give me the right term)and once the frequency waves start they get stronger and stronger if they have the design wrong....so anyway a few modifications and the bridge was safe!

Resonance is the word you are looking for.

1 hour ago, martin3 said:

And do you know the history about that bridge when it first opened?

It had a pretty bad flaw in it.After people started to walk on it it started swaying and they had to close it down and do some upgrades.

It was something to do with frequency waves(please someone give me the right term)and once the frequency waves start they get stronger and stronger if they have the design wrong....so anyway a few modifications and the bridge was safe!

It was never declared unsafe. It just wobbled a bit (by design) and it gave several people motion sickness, which is not helpful for a tourist attraction. It was stiffened up to reduce vomiting.

It was shaking a couple of years back when I walked out on it, I put it down to the fact you have to walk out in your bare feet so you don’t scratch the glass floor then the glass being so hot in the sun I was actually hopping around. 

Once was enough for me, I rate it similar to a fairground ride your told it’s safe then a disaster happens.

12 hours ago, Flugg said:

Foreigners are banned from working as engineers in Thailand, because locals can not compete in this field. Let that sink in... 

 

I worked for 6 years as an engineer in Thailand.  Alongside a dozen foreign engineers in my office and dozens more in our vendors' offices. 

 

We also had a lot of Thai engineers, many of whom were top notch.

 

13 hours ago, Assurancetourix said:

Why in Loei line ?

Wat Pha Tak Suea -

https://jonesyinthailand.com/nong-khai/attractions/wat-pha-tak-suea-skywalk-and-temple/

 

It's in Nong Khai province , not far from Sangkhom ...

This one is the new one right on the Mekong and Huang river - Phraphut Nawamin Mongkhon Lila Thawinakhara Phirak ( Phra Yai Phu Khok Ngio ).

 

image.png.59fe2d7ba71b289fc703449d55b8d51e.png  image.png.edc0bd4de77323dfcfba3ef41388e184.png

18 hours ago, mackayae said:

The Loie (Chiang Khan) skywalk is much larger than the one in Nong Khai (Sang Khom). Both overlook the Mekong.

I am surprised to discover this new thing in the province of Loei; I did not know him ; so my post above does not concern this new skytrack on which I will never set foot; I continue not to be mad.

  • 2 weeks later...

Engineering Expert does not bother me.  Thai Engineering Expert worries me.

On 2/13/2020 at 10:58 PM, impulse said:

We also had a lot of Thai engineers, many of whom were top notch.

I was also employed as an "engineer" in Thailand, worked alongside many excellent Thai engineers also, good people, they don't spend much time in the tourist areas where most on here live & become expert in all things Thai :wink:

On 2/13/2020 at 4:19 PM, rwill said:

Look at some of the videos of bridges swaying.  They were designed for it.  Or have you ever gone to a stadium and felt it moving? So it does seem like a plausible explanation.

 

Not a Thai engineer in sight.

 

 

"I don't want to know why you can't. I want to know how you can!"

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