Ul 790 Class A Roof

Coated steel or aluminum roofing panels.

Ul 790 class a roof. Ul standard ul 790 edition 8 standard for standard test methods for fire tests of roof coverings edition date. Ul 790 evaluates the ability of the roof assembly to resist a simulated fire. Astm e108 standard test methods for fire tests of roof coverings and ul 790 standard test methods for fire tests of roof coverings the tests provide the basis for the class a b and c designations. Class a roof assemblies and roof coverings shall be listed and identified as class a by an approved testing agency.

This test is called the ul 2218 impact rating. April 22 2004 ansi approved. Class a roof assemblies shall be permitted for use in buildings or structures of all types of construction. Class a roof assemblies are those that are effective against severe fire test exposure.

Ibc section 1505 requires that roof assemblies meet the ul 790 class a b or c fire performance based on the type of construction of the building on which they are utilized. Ul 790 class a assemblies home resources ul 790 class a assemblies. Spread of flame ul 790 burning brand testing ul 790 impact test ul 2218 intermittent flame testing ul 790 solar reflectance thermal emittance coating thickness astm c1549 and c1371 wind resistance astm d3161 wind uplift ul 1897 10x10 and 12x24 deck wind uplift ul 580. Roof assemblies resistances to exterior fire exposure are typically tested and classified using two similar test methods.

Underwriters laboratories ul is a not for profit independent testing organization that was founded in 1894. This test standard and closely related standards such as underwriters laboratories ul 790 and uniform building code 15 2 is used to determine the ability of a roof system to hinder the horizontal spread or vertical penetration of an. The 2012 and 2015 ibc in section 1505 of chapter 15 states that fire classification of roof assemblies is based on two tests astm e108 and ul 790 that are fundamentally identical. Any ul classified type g1 g2 or g3 base ply sheet type 15 20 or 30 felt or ul classified prepared roofing accessory or gcp applied technologies inc.

Ice and water shield. Each requires a spread of flame test and a burning brand test. Ul developed a test to rate the strength of roofing materials.