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www.reference.com/government-politics/class-1-fire-rating...

In the flame-spread rating test, a score of 0 to 25 constitutes a Class 1 rating. The score is relative and balanced between asbestos cement sheet, with a score of 0, and pure red oak, with a score of 100. Building materials with a Class 1 fire rating are often man-made or nonorganic substances.

www.safetyfile.com/pages/ul-fire-and-impact-ratings

UL Fire and Impact Ratings ... The UL Class 125 1-hour fire rating means that when exposed to external temperatures of over 1700°, the internal temperature of the safe will not exceed 125° for at least one hour – 125° is the temperature at which digital media is ruined, so product with this class of listing is designed to protect records ...

ul.com/wp-content/uploads/2015/05/Roof-Ratings-21.pdf

Class A, B, and C Roof Ratings Helpful hints for achieving code compliance Questions often arise about the construction needed to achieve a Class A, B, or C fire rating for a roof assembly. The information needed to achieve code compliant installations is included below. What are these ratings? The UL 790 (ASTM E 108) Standard Test Methods for

www.klsecurity.com/ul_fire_rating

If a manufacturer wants an Underwriters Laboratories (UL) label on their insulated records protection equipment, the product must meet or exceed the UL 72 testing standards. Products may undergo four different fire resistance tests: 1) fire endurance test, 2) fire and impact test, 3) explosion hazard test, 4) combined explosion and impact test.

en.wikipedia.org/wiki/Fire-resistance_rating

Tests for fire resistance of record protection equipment. The following classifications may be attained when testing in accordance with UL 72. Class 125 Rating. This rating is the requirement in data safes and vault structures for protecting digital information on magnetic media or hard drives.

www.usg.com/.../usg-fire-resistant-assemblies-catalog-en-SA100.pdf

for building occupants. Class A is not a fire-resistance designation. Fire-RatedFire-resistance ratings have long been used by UL, ASTM and building codes to measure the performance of various constructions for fire containment purposes. As applied to elements of buildings, the fire-resistance rating classifies the ability of an assembly

industries.ul.com/blog/its-fire-rated-but-is-it-the-right-test

Specifiers should help to ensure that the right fire rating, using the correct test, is used to fully meet the requirements of the regulatory codes, and thus achieve expected fire prevention performance. The UL Fire Resistance Directory is a resource that can help assist in researching and selecting the proper fire rated solution.

www.buildings.com/article-details/articleid/15175/title/...

The maximum flame spread is 6 feet for a Class A rated roof, 8 feet for Class B, and 13 feet for Class C. The slope of the test specimen is preselected, and since steeper slopes are more of a challenge due to melting material feeding the fire, the rating applies to the maximum slope passed.

gartalk.garlandco.com/class-1-vs-class-roof-assemblies

The best rating achieved is Class A, which is described by UL as, “Effective against severe fire exposure.” Class 1 Rating The Class 1 rating is an exclusive designation that can only be awarded by FM Global, which indicates the successful testing of the entire roof assembly using FM Approval Standard 4470.

www.amsecusa.com/fire-ratings-explained

Fire Ratings. When it comes to fire protection nobody does it better than American Security Products! AMSEC has developed products that earned the stringent Underwriters Laboratories UL ½ hr., 1 hr. and 2 hr. fire endurance classifications and have tested and certified a 45 min., 90 min. and 2 hr. series gun safes with Intertek ETL, the industry’s leading independent laboratory for gun safe ...