UL 1897

Uplift Tests for Roof Covering Systems

UL 1897

1 Scope

1.1 The test method specified in this Standard is intended to provide uplift resistance data for the evaluation of the attachment of roof covering systems to roof decks by using differential air pressures. It is applicable to any type of roofing system which is adaptable to the test equipment.

1.2 The test evaluates the roof covering systems method of attachment, including all components such as base sheets, ply sheets, slip sheets, membranes, etc. and insulation, if used. Supporting roof decks are evaluated only with respect to span conditions and physical properties such as gauge, yield strength, grade, size and/or species of lumber and related factors which affect fastener attachment or bond strength.

1.3 This test method provides a comparative measure of the uplift resistance for roofing systems by means of static differential pressure. The method does not necessarily simulate the actual dynamic uplift pressures encountered by roofing systems. Uplift pressures on a roofing system are dependent upon many factors such as wind gusts, building shape, edge configuration, and the terrain surrounding the building. A method to calculate the uplift pressures on roof assemblies is contained in the Standard for Minimum Design Loads for Buildings and Other Structures, American Society of Civil Engineers, ANSI/ASCE 7.

1.4 The purpose of this test method is to provide data regarding the securement of the roofing system to the roof deck based upon a short-term static load. When needed the option to include the roof deck attachment to supports shall be described in the test Report. A test method for evaluating uplift resistance of complete roof deck assemblies including the roof deck and its attachment to supports may also be available in Reports for Standard for Tests for Uplift Resistance of Roof Assemblies, UL 580.