(Exposure/Size Factor): Accounts for terrain roughness (e.g., urban vs. open sea) and the height of the structure. Sistema Viento | Gerencia de Ingeniería Civil
(Topographic Factor): Adjusts for local terrain features like hills or cliffs. FAcap F sub cap A
Buildings are also classified by their response to wind (Types 1 to 4), ranging from rigid structures to those highly sensitive to dynamic effects. Calculating Design Wind Speed ( VDcap V sub cap D ) manual de dise%C3%B1o por viento cfe 2020 pdf capo
VD=FT⋅FA⋅VRcap V sub cap D equals cap F sub cap T center dot cap F sub cap A center dot cap V sub cap R VRcap V sub cap R
New values for mean annual minimum temperatures significantly impact air density calculations, resulting in more accurate (and often higher) design wind speeds. (Exposure/Size Factor): Accounts for terrain roughness (e
The "Isotacas" (wind speed maps) now use a 50-year return period with increased regional velocities based on more recent meteorological records.
(Regional Velocity): The maximum probable wind speed for a specific zone, typically measured as a 3-second gust at 10 meters height. FTcap F sub cap T FAcap F sub cap A Buildings are also
The published by the Comisión Federal de Electricidad (CFE) is the definitive technical guide for structural wind engineering in Mexico. This 514-page document provides the rigorous mathematical and empirical frameworks necessary to ensure that infrastructure—from simple warehouses to complex power plants—can withstand aerodynamic forces. Core Objectives of the 2020 Manual
The primary goal of the CFE 2020 manual is to establish uniform criteria for calculating wind loads on structures across Mexico, a country with diverse wind climates including hurricane-prone coasts and high-altitude plateaus. Unlike many local building codes that are city-specific, the CFE manual offers a national standard often adopted by municipalities that lack their own specialized regulations.