Abstract
The response of line-like structures such as steel towers to wind gust have been obtained with technick of stochnick process by Davenport. He used the coherence instead of the cross-correlation spectrum. We proof that the coherence used by Davenport is the upper bound of cross-correlation spectrum with Davenports data. In practical point of view, the response of line-like structures to wind gust may be estimated fairely well closely by these two bounds.
