CvVd Question - Aashto LTS

[greencircle]

Guys,
In the Aashto code procedure to calculate Cd, I read to calculate CvVd:
Cv comes from Table 3-4 (AASHTO LTS-6)
V is the basic wind speed
d is the diameter of pole
(Cv x V x d)
Here d is the diameter of the pole. But, when its a taper pole, which diameter should be considered Top or Bottom?

Thanks
GC

 

[JedClampett]

Average?

 

[jayrod12]

whichever size gives you the worst case loading.

 

[PSEPK]

I would tend to agree with jayrod12, in absence of specific code recommendations.

A good structural engineer is often a blessing for others.