Tall Buildings in Strong Winds
Discussion
Currently in my hotel room on the 22 floor of the Beetham Tower in Manchester. Its quite blowy outside and the room is creaking like at ship at sea and I can actually feel it move. Lord knows what its like at the top!
I have been in taller buildings that sway, but am surprised at the movement 22 floors up.
Who else is swaying in the wind?
I have been in taller buildings that sway, but am surprised at the movement 22 floors up.
Who else is swaying in the wind?
Edited by blueg33 on Tuesday 3rd January 21:25
A few years ago I went up the tower at Emley Moor. Hanging from the ceiling in the Tower room (at 900ft) is a steel weight (like a paperweight) suspended on a bit of wire. It was a bit blowy when I was there and it was swinging back and forth a few inches.......
Except, of course the weight is stationary and the tower is bending about in the wind
Except, of course the weight is stationary and the tower is bending about in the wind
You need a little bit of flex in a structure to stop it just cracking/snapping.
At 22 storeys, even a tiny amount of 'flex' per storey can ammount to tens of milimetres that far up.
Did you know that timber floor joists in domestic dwellings can be designed to have up to around 12 mm of deflection when loaded.
At 22 storeys, even a tiny amount of 'flex' per storey can ammount to tens of milimetres that far up.
Did you know that timber floor joists in domestic dwellings can be designed to have up to around 12 mm of deflection when loaded.
Skodasupercar said:
You need a little bit of flex in a structure to stop it just cracking/snapping.
At 22 storeys, even a tiny amount of 'flex' per storey can ammount to tens of milimetres that far up.
Did you know that timber floor joists in domestic dwellings can be designed to have up to around 12 mm of deflection when loaded.
I did know the last bit (20 years as a housebuilder)At 22 storeys, even a tiny amount of 'flex' per storey can ammount to tens of milimetres that far up.
Did you know that timber floor joists in domestic dwellings can be designed to have up to around 12 mm of deflection when loaded.
blueg33 said:
Currently in my hotel room on the 22 floor of the Beetham Tower in Manchester. Its quite blowy outside and the room is creaking like at ship at sea and I can actually feel it move. Lord knows what its like at the top!
I have been in taller buildings that sway, but am surprised at the movement 22 floors up.
Who else is swaying in the wind?
Can you not hear it howling ? It's been noisy as fck all day !I have been in taller buildings that sway, but am surprised at the movement 22 floors up.
Who else is swaying in the wind?
Edited by blueg33 on Tuesday 3rd January 21:25
http://m.youtube.com/index?desktop_uri=%2Fmobile&a...
Skodasupercar said:
You need a little bit of flex in a structure to stop it just cracking/snapping.
At 22 storeys, even a tiny amount of 'flex' per storey can ammount to tens of milimetres that far up.
Did you know that timber floor joists in domestic dwellings can be designed to have up to around 12 mm of deflection when loaded.
14mm IIRCAt 22 storeys, even a tiny amount of 'flex' per storey can ammount to tens of milimetres that far up.
Did you know that timber floor joists in domestic dwellings can be designed to have up to around 12 mm of deflection when loaded.
it could get very very windy round there. Skodasupercar said:
Is that to BS 5268 or Eurocode 5? 
You might be right about the 14 mm actually, but I think it is to a max of 12 mm to EC5 depending on span. Anyway, it is quite a lot!
Buildings in earthquake prone areas are now designed to flex and sway to stop them just falling apart.
I'm old school ... BS 5268You might be right about the 14 mm actually, but I think it is to a max of 12 mm to EC5 depending on span. Anyway, it is quite a lot!
Buildings in earthquake prone areas are now designed to flex and sway to stop them just falling apart.
ATTAK Z said:
Skodasupercar said:
You need a little bit of flex in a structure to stop it just cracking/snapping.
At 22 storeys, even a tiny amount of 'flex' per storey can ammount to tens of milimetres that far up.
Did you know that timber floor joists in domestic dwellings can be designed to have up to around 12 mm of deflection when loaded.
14mm IIRCAt 22 storeys, even a tiny amount of 'flex' per storey can ammount to tens of milimetres that far up.
Did you know that timber floor joists in domestic dwellings can be designed to have up to around 12 mm of deflection when loaded.
Aviz said:
Can you not hear it howling ? It's been noisy as fck all day !
http://m.youtube.com/index?desktop_uri=%2Fmobile&a...
Nowhere near as loud as it was at home this morninghttp://m.youtube.com/index?desktop_uri=%2Fmobile&a...
https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-as...
Edited by Justayellowbadge on Wednesday 4th January 09:19
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