Moment frame drift due to wind
Moment frame drift due to wind
(OP)
I'm sure this has been posted before but I can't seem to find any old posts. What are people using for drift limits for moment frames loaded from wind?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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Moment frame drift due to wind
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RE: Moment frame drift due to wind
Also, when checking drift you should use the ten-year wind, not the 50-year wind that you use when you check strength.
If your wind speed is 90-100 mph, the 10-year wind is .84*50-year wind, and you should use 0.71*50-year wind FORCES (since V is squared in the force equation - 0.84*0.84 = 0.71).
If your wind speed is >100mph, the 10-year wind speed is 0.73*50-year wind speed and the factor for forces is 0.53*50-year wind FORCE (0.73*0.73 = 0.53)
RE: Moment frame drift due to wind
You might also take a look at ASCE 7-02, CB1.2.
RE: Moment frame drift due to wind
thread726-41297: Wind Drift
thread507-58045: Sway comfort level