On 3/9/12 10:32 AM, Gary Slagel wrote:
> Shoot... using the .707 figure for 45 deg I'm back right at the worst
> case scenario. Where does the .707 come from?
cosine (45 degrees)
That's the projected area in the direction of the wind coming from 45
degrees off axis.
> I was using a simplified version of windload calcs from the force 12 web
> site that goes something like '..wind load is either the total element
> wind load OR the boom windload, whichever is the larger resistance to
> the wind....'.
That's probably not a very valid approach. Some sort of "projected
area" is more valid, but neglects the skin friction along the axis of
the tube.
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