UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close

UL 790

UL Standard for Safety Standard Test Methods for Fire Tests of Roof Coverings

inactive
Buy Now
Organization: UL
Publication Date: 22 April 2004
Status: inactive
Page Count: 32
scope:

These requirements cover the fire resistance performance of roof coverings exposed to simulated fire sources originating from outside a building on which the coverings are installed. They are applicable to roof coverings intended for installation on either combustible or noncombustible decks (see 1.7) when the roof coverings are applied as intended.

Three classes of fire exposure are described.

Class A roof coverings are effective against severe fire test exposures. Under such exposures, roof coverings of this class afford a high degree of fire protection to the roof deck, do not slip from position, and are not expected to produce flying brands.

Class B roof coverings are effective against moderate fire test exposures. Under such exposures, roof coverings of this class afford a moderate degree of fire protection to the roof deck, do not slip from position, and are not expected to produce flying brands.

Class C roof coverings are effective against light fire test exposures. Under such exposures, roof coverings of this class afford a light degree of fire protection to the roof deck, do not slip from position, and are not expected to produce flying brands.

Tests conducted in accordance with these requirements are intended to demonstrate the performance of roof coverings during the types and periods of fire exposure involved, but are not intended to determine the acceptability of roof coverings for use after exposure to fire. These fire test methods do not provide a basis to compare expected performance under all actual fire conditions but they do provide a basis for comparison of the response of roof coverings when subjected to fire sources that are described herein.

A combustible deck is formed of wood (sheathing boards or plywood). A noncombustible deck is formed of metal, concrete, or poured gypsum.

Document History

April 22, 2004
UL Standard for Safety Standard Test Methods for Fire Tests of Roof Coverings
These requirements cover termination boxes rated 600 V or less that consist of lengths of bus bars, terminal strips, or terminal blocks with provision for wire connectors to accommodate incoming or...
April 22, 2004
UL Standard for Safety Standard Test Methods for Fire Tests of Roof Coverings
These requirements cover the fire resistance performance of roof coverings exposed to simulated fire sources originating from outside a building on which the coverings are installed. They are...
April 22, 2004
UL Standard for Safety Standard Test Methods for Fire Tests of Roof Coverings
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...
April 22, 2004
UL Standard for Safety for Standard Test Methods for Fire Tests of Roof Coverings
These requirements cover the fire resistance performance of roof coverings exposed to simulated fire sources originating from outside a building on which the coverings are installed. They are...
UL 790
April 22, 2004
UL Standard for Safety Standard Test Methods for Fire Tests of Roof Coverings
These requirements cover the fire resistance performance of roof coverings exposed to simulated fire sources originating from outside a building on which the coverings are installed. They are...
September 5, 1997
UL Standard for Safety Tests for Fire Resistance of Roof Covering Materials
These requirements cover the performance of roof covering materials exposed to fire conditions, and are intended to indicate the fire-resistance characteristics of roof coverings when exposed to fire...
790
September 5, 1997
UL Standard for Safety Tests for Fire Resistance of Roof Covering Materials
These requirements cover the performance of roof covering materials exposed to fire conditions, and are intended to indicate the fire-resistance characteristics of roof coverings when exposed to fire...
790
January 1, 1995
UL Standard for Safety Tests for Fire Resistance of Roof Covering Materials
A description is not available for this item.

References

Advertisement