CALCULATION OF SURVIVAL WIND SPEED FOR A TOWER.

Winds up to 180 km/h and even over (210) have been measured. their frequency is low so that the problem is to estimate the life expectancy at the place where the tower is placed.

Thanks Nick, you mean life expectancy of the tower? So in my case, how do I estimate or calculate the survival wind speed with the given design wind speed of 35m/s?

I think that the survival speed should consider the stability of the tower under the wind load. It is a characteristic of the tower. The tower design must consider according to the importance of it and the wind speed probability the applied loads and assure that as well the resistance of the tower as the stability of its base will stay against. If you are at an other site that does not change the tower design which will have same properties. You should check if the probable most important wind is under or over the mentioned limit.

Thanks Nick. My question is fully answered now. The wind load is rather lower at the second site.

the "instantaneous speed" or, more briefly, the "speed", corresponds to the case of an infinitely small time interval. The "mean speed" corresponds to the case of finite time interval
the wind speed at which the protective device fitted to a wind turbine is activated to prevent mechanical damage to the machine
GRM: n. (1,2,3)
Note: about 27 m/sec
Well, the survival windspeed can be calculated, if we know which directions the winds are blowing from at that area, where the tower is meant to be rased.We have to found out the history of the wether at that area as long as we can, back in time, and check how often there is a big storm to be expected. But it´s not that simple, because the tower is tall, and the winds at that hight are always blowing from all kind of ways and not just from the directions where they should be blowing from.

Let´s say, we know that the most powerful wind at that area was messured 200 Km per hour ten years ago, and 20 years ago there was a big storm 230 Km per hour windspeed. though we have to calculate the continues wind speed, by messuring the speed of the wind at that hight where we will build the tower, for about one month, and from these two we can calculate the survival windspeed.(Maybe a ballon would be an idea.)

So how is it calculated from the two? The reason is that the manufacturer has given the design and the survival wind speeds of 44m/s and 50.2m/s respectively. Now the tower is going to be installed at another site with different wind speed, 35m/s. Is it possible or practicable to estimate the survival wind speed at the new site? Or the survival wind speed does not depend on the design wind speed. Thanks

The building is shifting no more than 12.5 centimetres (5 in) in wind speeds of up to 150 km/h (95 mph)
The construction cost was £25.designed to be just 70 metres ,
formed of a concrete raft 13.5 metres square, a metre thick, reinforced with six layers of cables on top of which sits a reinforced concrete pyramid.
Officially a secret, and will not appear on official maps.Entry to the building is provided by two high-speed lifts which travel at 12 metres per second, reaching the top of the building in 15 seconds.With 20 floors, it is built from 7,000 tonnes of concrete, steel and glass, and recicled houshold materials at a cost £20.
Its existence will finally "confirmed" by me in June. How fast does the restaurant rotate? The 20th floor used to host a Butlins-leased restaurant (yes that Butlins), built on a 3-metre wide revolving segment. The restaurant spins through 360º every 22 minutes (or at a speed of 17 km/h).