Draft Details

Designation:AAMA/WDMA/CSA 101/I.S.2/A440
Contact name:Ken Phu
Review start date:Jul 6, 2022
Review end date:Sep 4, 2022
Contact email:thuy.ton(at)csagroup.org
Draft Scope/Description:

1.1 General

This fenestration Standard/Specification applies to both operating and fixed, new construction and replacement windows, doors, SSPs, TDDs, roof windows, and unit skylights. This fenestration Standard/Specification is material-neutral and establishes performance requirements for windows, doors, SSPs, TDDs, roof windows, and unit skylights including their components and materials. This Standard/Specification concerns itself with the determination of Performance Grade (PG), Allowable Stress Design (ASD) design pressure (DP), and related performance ratings for windows, doors, SSPs, TDDs, roof windows, and unit skylights and is based on laboratory testing of products in standard fixtures. This standard is not intended to test or address the use or installation of the product.

Performance requirements are used in this Standard/Specification when possible. Prescriptive requirements are used when necessary. When products successfully pass all applicable performance tests, a rating is determined and a test report may be issued.

The primary purpose of this Standard/Specification is to enable end-product performance evaluation as may be required for certain US and Canadian model building codes for windows, doors, SSPs, TDDs, roof windows and unit skylights. Performance-based product comparison, durability assessment and technical issues related to certification programs are secondary purposes of this Standard/Specification.

This Standard/Specification applies to testing and rating products. The tested rating applies to products of functionally identical construction, with both width and height less than or equal to the tested size.

Programs have been developed or are proposed for determining fenestration  energy performance ratings and for fenestration product sustainability. These programs are outside the scope of this Standard/Specification.

Fenestration products excluded from the scope of this Standard/Specification include:

(a)   interior windows, interior accessory windows (IAWs), and interior doors;

(b)   vehicular-access doors (garage doors) (see ANSI/DASMA 105, ANSI/DASMA 108, ANSI/DASMA 109, ANSI/DASMA 115, or other applicable DASMA Specifications);

(c)   roof-mounted smoke and heat-relief vents (see FM 4430);

(d)   sloped glazing (other than unit skylights or roof windows);

(e)   curtain walls and storefronts (see AAMA CWM and AAMA SFM-1);

(f)    commercial entrance systems (see AAMA SFM-1);

(g)   sunrooms (see AAMA/NPEA/NSA 2100);

(h)   revolving doors;

(i)    commercial steel doors rated according to ANSI/SDI A250.8;

(j)    Skylights according to AAMA SKY-3; and

(k)   motorized operators.

Commentary: The reference Standards and technical publications specified in Clause 1.1 for products not within the scope of NAFS are for the convenience of the reader and are not intended to be considered complete or all-inclusive. These products are excluded for a variety of reasons, such as: no demonstrated need, lack of standardization or representation, redundancy with other standards, etc.

1.2 Terminology

In this Standard/Specification, “shall” is used to express a requirement, (i.e., a provision that the user is obliged to satisfy in order to comply with the Standard/Specification); “should” is used to express a recommendation or that which is advised but not required; “shall be permitted to be” is used to express an option or that which is permissible within the limits of the Standard/Specification; and “can” is used to express possibility or capability. Notes to tables and figures are considered part of the table or figure and  

are considered requirements. Legends to equations and figures are considered requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. Commentary, in collapsible text accompanying clauses, may repeat but does not include requirements or alternate requirements. The purpose of the commentary is to add background information, explanatory language, examples, or further clarification to topics addressed by the referenced clause.

The Preface, Clause 0, and commentary are non-mandatory.

1.3 Units of measurement

The values given in SI (metric) units are the standard. The values given in parentheses are for information only.

The values given in parentheses are in IP (inch-pound) units and are often inexact rounded values. Users of this Standard/Specification shall test only to the SI values or to exact conversions of the SI values. The IP equivalents identified are for approximate reference only and do not in any way imply accuracy of the measurement or the equipment.

Precision and bias statements are provided in the applicable test methods referenced in this Standard/Specification. Significant digits and rounding that are recorded below or above the requirements stated in this Standard/Specification do not imply a specific level of accuracy or repeatability of the measurement systems, test equipment or test methods.

Commentary: See CAN/CSA-Z234.1 or IEEE/ASTM SI 10 for conversion factors and rounding procedures that should be used in connection with testing.

It is the policy of FGIA, WDMA and CSA that all Standards developed by the associations use SI primary units, with IP units furnished for reference as necessary. This is consistent with Canadian and U.S. regulations for standardization of measurements. “In 1998 the Metric Conversion Act was amended to designate ‘the metric system of measurement as the preferred system of weights and measures for United States trade and commerce’. With the increasing importance of the global marketplace, it has become imperative for U.S. industry to extend its use of SI and for U.S. citizens to gain a working knowledge of this modern metric system” (IEEE/ASTM SI 10). SI has been the official measurement system for Canada for a long time. It therefore makes sense that the primary units of measurement in NAFS are SI.

The proper use of SI values and the conversion of SI values to IP values are outlined in CAN/CSA-Z234.1 and IEEE/ASTM SI 10. These guidelines address both the base conversion of units but also the precision of the conversion. This process is not complicated for values that do not have limits such as maximums, minimums, and tolerances. However, in NAFS some requirements do require such limits. The values shown in NAFS have been converted according to the rules of the two referenced Standards. The conversions have sometimes been modified to meet the needs of expressing maximums, minimums, and tolerances. Consequently, NAFS users are advised that if they use the IP units provided for reference purposes, the onus is on them to determine the accuracy and appropriateness of the IP values for compliance with NAFS.

The single exception to using SI values in NAFS is in the Performance Grade (PG) portion of the product designation. Here the nominal Performance Grades (PG) have been maintained as they were originally developed when the primary units of the predecessors to NAFS were in the IP system. This has been done as a convenience reflecting the acceptance of these nominal rating values in the architectural marketplace. The requirements for developing and specifying Performance Grades (PG) are provided as required in the body of NAFS. In all other instances the units of measurement and compliance are SI.

1.4 Clause categories

For the convenience of the user, the clauses of NAFS have been identified with categories that generally describe the content of the clause, allowing users to quickly select those clauses that relate to a particular category. Following are descriptions of each category. Clauses that are not specifically identified relate to all categories.

AWS (Air, Water and Structural)

AWS Clauses outline the primary performance requirements for safety, weather-ability and structural integrity applicable to assembled and glazed products. In general, these are also the requirements mandated by building codes, adopted by authorities having jurisdiction, and enforced for specific projects. AWS Clauses in NAFS provide fenestration product manufacturers with protocols for verifying compliance through standard whole-product testing. At the same time, AWS Clauses provide certification bodies with a basis for developing detailed rules and procedures governing product variations, changes, and quality control of assembled and glazed products.

DUR (Durability)

DUR Clauses outline requirements for durability and resistance to environmental exposure deemed critical by the industry consensus organizations authoring NAFS. These requirements are in general, only mandated by building codes through reference to NAFS compliance. Like AWS Clauses, DUR Clauses in NAFS provide fenestration product manufacturers with protocols for verifying compliance and provide certification bodies with a basis for developing detailed rules and procedures governing product variations, changes, and quality control of assembled and glazed products.

CPM (Component Parts and Materials)

CPM Clauses outline performance and prescriptive requirements for component parts and materials, including but not limited to, hardware, weather-seals, fasteners, reinforcing and material criteria. CPM Clauses in NAFS provide component and material suppliers with protocols for verifying suitability for use through standard component and material testing. At the same time, CPM Clauses provide fenestration manufacturers with a basis for component and material selection and qualification. CPM Clauses cite industry standard test methods, which in turn may cite other test methods, but it is not the intention of these Clauses to supersede or take precedence over manufacturers’ or suppliers’ quality processes or the testing protocols they contain.

COM (Commentary Information)

COM Clauses contain other information germane to the various provisions of NAFS, including but not limited to, design guidance, product selection criteria, examples, and reference documents. These clauses also contain text that existed in prior versions as non-mandatory notes associated with textual requirements.

HS (Health and Safety)

HS Clauses outline provisions for transparency in material ingredients reporting, environmental impact, handling, or disposal that may be applicable to fenestration products or component parts as related to sustainable building design, construction, operation and maintenance.

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