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The American Wood Council has developed a new series of easy-to-use Guides to Wood Construction in High Wind Areas. This document addresses wind design requirements in 120 mph wind zones. These Guides are based on provisions contained in AF&PA's Wood Frame Construction Manual (WFCM) for One- and Two-Family Dwellings, 2001 Edition, the reference document for high-wind wood-frame construction in the International Residential Code (IRC). Use of the high wind provisions of these Guides will result in design solutions that prescriptively meet the requirements of the WFCM and the International Residential Code.
The high-wind provisions in these Guides can be used to achieve code-compliant design solutions for wood-frame dwellings located in wind speed zones that exceed the limitations in the International Residential Code.
Separate documents address wind design requirements in
90, 100, 110, 120, and 130 mph wind zones. The guides are also available as a five-volume set.
From the Introduction
The purpose of this Guide to Wind Construction in High Wind Areas: 120 MPH Exposure B Wind Zone (Guide) is to simplify the construction and design of wood frame buildings in areas where design wind velocity requirements do not exceed 120 miles per hour Exposure Category B. This Guide is in compliance with the building code-referenced ANSI/AF&PA 2001 Wood Frame Construction Manual (WFCM) for One- and Two-Family Dwellings. Accordingly, any designs in compliance with this Guide should also be in full compliance with the WFCM. The provisions of this Guide focus on ensuring structural integrity for resisting wind loads. This Guide does not specifically address other loading conditions such as those created by live, seismic (earthquake), snow, or flood loads. These additional loading conditions must be considered as required by the building code and are addressed in the WFCM.
The information in this Guide offers information to architects, builders, designers, code officials, instructors and others interested in simplified design, It is not the intent of this Guide to instruct on all aspects or techniques of proper framing or design. In developing the provisions of this Guide using provisions of the WFCM, the most reliable data available from laboratory tests and experience with structures in service have been carefully analyzed and evaluated for the purpose of providing a consistent standard of practice. It is intended that this document be used in conjunction with competent engineering design, accurate fabrication, and adequate supervision of construction. Therefore, AF&PA does not assume any responsibility for errors or omissions in this Guide, the WFCM, nor for engineering designs or plans prepared from it. |
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