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1.1 This test method evaluates the longitudinal shear strength before and after thermal cycling for thermally broken composite thermal barriers used in framing of windows, doors, and skylights. It also evaluates the ability of a thermal barrier to maintain its longitudinal dimension after thermal cycling.

1.2 This test method is applicable to all fenestration products that are constructed with structural thermal barriers that are affixed along their length to the adjoining metal profile

1.3 This test method is meant to be applicable to many types of fenestration frame types and is not meant to be specific to any single frame construction type.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

5.1 Thermal barriers require sufficient structural strength to carry the loads imposed on fenestration members while reducing the heat transfer through the depth of the framing members throughout their service life.

5.2 Sustained gravity, bending and tensile loads that stress the thermal barrier (that is, glazing infill weight, wind loads, and glazing gasket pressure) are not covered by this test method.

5.3 The reader is encouraged to read AAMA TIR-A8 for further information on thermal barriers and testing.