Wind load definition

There are two forces acting on foundations of the type under consideration the dead load, acting in a vertical direction and the wind load, acting in a horizontal direction. The combined action of these two forces has the same effect as an eccentric vertical load. It is not necessary to calculate the eccentricity to determine the stability of the foundation. However, because there are definite relationships between eccentricity and stability, they will be explained as a matter of interest. 

The design of support structures (not covered by this Code) and of supporting elements (see definitions of piping and pipe-supporting elements in para. GR-1.5) shall be based on all concurrently acting loads transmitted into such supports. These loads, defined in para. IP-2.1, include weight effects, loads introduced by service pressures and temperatures, vibration, wind, earthquake, shock, and displacement strain [see para. IP-6.1.3(a)]. 

The definition of the environmental parameters follows the evaluation of the extreme values for the quantities of interest, which define also the duration of such conditions, their periodicity and their reasonable combination with other load cases, such as wind or precipitation, and biological conditions. 

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