UL 1897:2020 PDF Download

The UL 1897:2020 standard specifies a test method for evaluating the uplift resistance of roof covering systems. The purpose of this standard is to provide data on the attachment of roof covering systems to roof decks, using differential air pressures. The test is suitable for any type of roofing system that can be accommodated by the test equipment.

The test evaluates the method of attachment of the roof covering system, including all components such as base sheets, ply sheets, membranes, insulation, etc. It also considers the characteristics of the supporting roof decks, such as span conditions and physical properties like gauge, yield strength, and lumber grade, that affect fastener attachment or bond strength.

It is important to note that this test method provides a comparative measure of uplift resistance using static differential pressure. It does not simulate actual dynamic uplift pressures experienced by roofing systems, which can be influenced by factors like wind gusts, building shape, edge configuration, and surrounding terrain. To calculate uplift pressures on roof assemblies, the Standard for Minimum Design Loads for Buildings and Other Structures by the American Society of Civil Engineers (ANSI/ASCE 7) provides a method.

The purpose of this test method is to provide data on the securement of the roofing system to the roof deck under short-term static loads. The test report may also describe the option to include the roof deck attachment to supports if needed. Additionally, for evaluating the uplift resistance of complete roof deck assemblies, including the roof deck and its attachment to supports, a test method may be available in reports for the Standard for Tests for Uplift Resistance of Roof Assemblies (UL 580).