Construction Time Wind Load
Construction Time Wind Load
(OP)
What is the minimum wind load used to check erection time conditions?
Or where is this issue well covered?
Assume you have to erect a long span truss on temporary structure on an open terrain at elevation above 10meters(33ft). Workers will be working on the temporary structure for at least two weeks.
Or where is this issue well covered?
Assume you have to erect a long span truss on temporary structure on an open terrain at elevation above 10meters(33ft). Workers will be working on the temporary structure for at least two weeks.






RE: Construction Time Wind Load
https://www.asce.org/bookstore/book.cfm?book=4242
RE: Construction Time Wind Load
Design Loads on Structures During Construction, SEI/ASCE 37-02
(ASCE Standard No. 37-02)
found at:
https://www.asce.org/bookstore/book.cfm?book=4242
RE: Construction Time Wind Load
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Chapter 3 covers "Design Consideration". Starting on page 3-4 there is a discussion of allowable horizontal construction loads (from any source, wind included). This manual limits allowable horizontal forces to 2% of total dead load. Ways to back-figure the allowable wind speed are discussed.
It is interesting that the manual (accurately, in my opinion) points out that there is no need for precise assumpitions and calculations since the whole situation is complex and changing as work progresses.
www.SlideRuleEra.net
RE: Construction Time Wind Load
RE: Construction Time Wind Load
RE: Construction Time Wind Load
RE: Construction Time Wind Load
European draft code hints a wind speed of return period of 2 years to be used in all erection jobs.
But as you might know such a general statement can be very annoying because wind speeds as used in ASCE I guess are 50 year winds and they are MEAN values measured at 33ft (10m) height on a clear terrain with NO GUST taken into account.You take into accout gusts etc with a separate factor. You convert that to 10 year wind by some rules of thumb like factor 0.75. No joke I will never guess what 2 year no gust mean wind speed will mean what!
Winds cited in Russian codes can be seemingly very low, while in fact they are based on a different set of measurements which I have never found to time to fully study given the language barrier.
(Some codes tend to mention gust speeds as basis of wind data).
Thanks & regs
IJR
RE: Construction Time Wind Load