This is the third edition of AAMA/WDMA/CSA 101/I.S.2/A440, NAFS — North American Fenestration Standard/Specification for windows, doors, and skylights.
It supersedes the previous edition, published in 2008 under the same title and published in 2005 under the title Standard/Specification for windows, doors, and unit skylights. It is jointly published by the American Architectural Manufacturers Association (AAMA), the Window & Door Manufacturers Association (WDMA), and the Canadian Standards Association (CSA).
The following significant changes from the previous edition of this Standard/Specification have been made:
A thorough restructuring of the Standard/Specification, with separate sections for products and materials and components.
Reorganized mullion provisions, with new ratings and designations.
Addition of parallel opening windows.
Expansion of TDD products to include closed ceiling and open ceiling options.
Addition of criteria for Secondary Storm Products (SSP) throughout the document.