Design Wind Speed Comparisons
Design Wind Speed Comparisons
(OP)
Can anyone recommend references or literature to compare different design wind speeds such as the 3 second gust and the fastest mile?
I frequently design tower crane foundations in the Southeast of the US so out of service wind speeds play a larger role in the foundation design. I am looking to better understand the different wind speeds.
I frequently design tower crane foundations in the Southeast of the US so out of service wind speeds play a larger role in the foundation design. I am looking to better understand the different wind speeds.






RE: Design Wind Speed Comparisons
It's a place to start.
RE: Design Wind Speed Comparisons
How could you do anything so vicious? It was easy my dear, don't forget I spent two years as a building contractor. - Priscilla Presley & Ricardo Montalban
RE: Design Wind Speed Comparisons
How could you do anything so vicious? It was easy my dear, don't forget I spent two years as a building contractor. - Priscilla Presley & Ricardo Montalban
RE: Design Wind Speed Comparisons
I found the tower crane manufacture supplies the out of service base foundation load due to an average wind speed (over a minute or 10mins etc) rather than a gust for stability calculations. I realise that some building codes specify winds as an average generally, but it got me thinking - Do the crane manufactures do this because there is not sufficient 'work energy' in a 3 second wind gust to overturn a tower crane, and therefore the 3 second gust wind speed is not applicable? I guess this lodgic would not apply when designing the steel elements of the crane structure that could become overstressed in a 3 second event.
RE: Design Wind Speed Comparisons
I will note there is a new Euro code for tower crane design for newly developed models that is similar to the ASCE. However, here in the US we will be very unlikely to see any of these new models for a very long time. We are stuck with what we have.
RE: Design Wind Speed Comparisons
Do you know why they have introduced this? I'm pretty sure it is mandatory practice to leave slewing ring free to rotate out of service, and therefore impossible for crane not to weathervane at the out of service wind speeds.
I'd like to see a worked examle of the wind load calculation on a tower crane structure, including drag along the jib - Its a pretty complex calculation (I have tried to do it before)