Accessibility and barrier-free design notwithstanding, the North American Fenestration Standard (NAFS), referenced in the 2010 National Building Code of Canada (NBC), sets different operating force limits for standard CW and AW Performance Class windows. There are inherent differences between window types.
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Accessibility to fresh air and a connection to the outdoors for those with physical disabilities are especially important in skilled nursing and personal care facilities, multi-family dwellings, and hotels, along with classrooms and dormitories. To help ensure this access, windows capable of meeting operating force and motion requirements of International Code Council/American National Standards Institute (ICC/ANSI) A117.1, Accessible and Usable Buildings and Facilities, are being more commonly specified in the United States. This trend can be expected to expand into Canada.
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The 2010 editions of the National Model Construction Codes—the National Building Code of Canada (NBC), the National Fire Code of Canada (NFC), and the National Plumbing Code of Canada (NPC)—were released last November. Published by the National Research Council Institute for Research in Construction (NRC-IRC), the new codes contain about 800 technical changes.
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