# How do I combine the effects of the wind load acting on a guyed mast, which consists of mean wind loading and a patch load, according to the standard EN 1993‑3‑1 B.4.3.2.5 (1)?

Chapter B.4.3 of the standard EN 1993‑3‑1 describes the equivalent static method to analyze the dynamic response to wind turbulence.

The patch loads describe the fluctuating wind components.

${\mathrm S}_{\mathrm{TM}}={\mathrm S}_{\mathrm m\;}\pm{\mathrm S}_{\mathrm p}$

${\mathrm S}_{\mathrm p}=\sqrt{\sum_{\mathrm i=1}^{\mathrm N}\left({\mathrm S}_{\mathrm i}-{\mathrm S}_{\mathrm m}\right)^2}$

where
i is the number of the actual spans
N is the total number of load patterns required (actual spans i)