Standard Test Methods for Fire Tests of Roof Coverings

Available format(s)

Hardcopy

Language(s)

English

Published date

02-18-2022

Publisher

Underwriters Laboratories

This new edition of ANSI/UL 790 dated February 18, 2022 includes the following changes in requirements: – Listing of Test Methods in Scope; 1.1 – Update of Scope and Roof Deck Clarification; 1.2, 1.4 – Class B Burning Brand Test Modifications; Table 3.1, 8.4.2.1 – Figure 4.1 Title Change and Editorial Corrections; 4.2.1, 4.2.2 – Roof Coverings Clarification; 4.2.3, 4.2.4 – Burning Brand Deck Clarification; 4.2.5 – Spread-of-Flame Test Deck Clarification; 4.3.1 – Clarification to 4.4.1 – Thermocouple Stabilization for Calibration; 5.5 – Intermittent-Flame Test Air Supply; 6.1 – Ignition of Brands Timing; 8.3.1 – Flying-Brand Test Air Current Clarity; 9.3

These requirements cover the measurement of the relative fire characteristics of roof coverings exposed to simulated fire sources originating from outside a building on which the coverings are installed.