It is important to clarify from the outset: released by the Comisión Federal de Electricidad (CFE).
| Feature | CFE 2008 (Old) | CFE 2020 (Current - The "Capo") | | :--- | :--- | :--- | | | Basic wind speed for 50-year return period. | Three return periods: 50 (service), 500 (ultimate), 1500 (extreme). | | Topography | Simplified factors. | Detailed Topographic Factor (Kzt) with escarpments, hills, and ridges. | | Exposure categories | Definite categories. | Refined to four categories (Exposure A, B, C, D). | | Directionality | Implicit. | Explicit Directionality Factor (Kd) . | | Envelope method | Basic. | Advanced low-rise building envelope method. |
Bookmark the CFE Manuals site. The CFE releases errata and minor updates (e.g., 2022, 2023) without changing the version number. Check for "Hoja de Erratas" at the bottom of the page before starting any critical project.
However, finding the correct, official, and updated version requires understanding how the Comisión Federal de Electricidad (CFE) organizes its design manuals. In this comprehensive guide, we will dissect the standard, explain where to legally download the PDF, break down its most critical chapters, and show you how to apply it correctly. The term "CAPO" does not appear in any official CFE title. We will treat it as a search for the "master chapter" or the document's core content. The official name is "Manual de Diseño de Obras Civiles - Diseño por Viento" (MDOC-Viento) , part of the CFE Normativa. Part 1: The Evolution – From 2008 to 2020 Before downloading anything, you must understand the context. The previous version was the CFE 2008 (based on the now-obsolete Normas Técnicas Complementarias ). The CFE 2020 represents a complete paradigm shift, aligning more closely with international standards like ASCE 7 (USA).