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American Wood Council

STD342-1 – Calculating Wind Loads on Low-Rise Structures per WFCM Engineering Provisions


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The Wood Frame Construction Manual (WFCM) for One- and Two-Family Dwellings (ANSI/AWC WFCM-2015) is referenced in the 2015 International Building Code and 2015 International Residential Code. For WFCM wind load calculations, Minimum Design Loads for Buildings and Other Structures (ASCE 7-10) is used. The 2015 WFCM includes design information for buildings located in regions with 700-year return period “three second gust” design wind speeds between 110 and 195 mph. ASD wind pressures for Main Wind-Force Resisting Systems (MWFRS) and Components and Cladding (C&C) are computed. Shear, uplift, and overturning loads are calculated for various building components. WFCM Chapter 2 provides minimum loads for the purpose of establishing specific resistance requirements for buildings within the scope of the document. This presentation will provide background and examples for calculation of these forces which will enable designers and code officials to quickly determine wind design loads for projects.

Learning Objectives

Upon completion of this webinar, participants will:

  1. Understand applicable wind loads from ASCE 7-10 for structures within the WFCM scope.
  2. Be familiar with application of MWFRS versus C&C loads for various building components and systems.
  3. Be familiar with shear, uplift, and overturning wind loads for various building components.
  4. Be familiar with tabulated values and their basis in WFCM Chapter 2 for wind loads.

Equivalencies: 1.0 Hours of Instruction = 0.1 Continuing Education Units (CEU) = 1 Professional Development Hours (PDH) = 1 Learning Units (LU)

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