Wind Load Effect on Closely Spaced Vertical Vessels

[DAR5052]

Is anyone aware of requirements in ASCE 7 to increase the wind load due to closely spaced vertical vessels (towers, stacks) of similar shape and height? I know other codes (international and some mechanical) do have a factor based on the C/C distance of the vessels but haven't found anything in ASCE that addresses this. Thanks.

 

[JStephen]

See 6.5.1 Item 2 and 6.5.2 in ASCE 7-05, I assume it's similar in other versions.