Cart
0
Product
Products
(empty)
No products
To be determined
Shipping
$0.00
Total
Product successfully added to your shopping cart
Quantity
Total
There are 0 items in your cart.
There is 1 item in your cart.
Total products
Total shipping
To be determined
Total
Reduced price!
View larger
View larger
UL 1256
New product
UL 1256 4th Edition, July 17, 2013 UL Standard for Safety Fire Test of Roof Deck Constructions
More info
Description / Abstract:
These requirements cover fire test methods to evaluate the
performance of metallic and nonmetallic roof deck constructions
subjected to internal (under deck) fire exposures for the purpose
of determining the contribution of the roof covering material,
insulation, and other components of the roofing system to the
spread of fire within a building. As the extent of flame
propagation, thermal degradation, and combustive damage are
determined after roof deck constructions are exposed to controlled
fire conditions, these requirements are not intended for use in
describing or defining the fire hazard or risk of fire under actual
fire conditions.
These requirements do not include tests to evaluate other potential hazards to roof deck constructions, such as structural integrity under fire exposure or wind uplift.
Two fire test methods are described in Parts I and II of this Standard. One of these test methods shall be selected based on assessment of fire test experience, as outlined in 1.4, 1.5 and 1.6.
Part I describes the large scale fire test method used to evaluate roof deck constructions which by experience in actual installations were known to have contributed extensively to underdeck fire spread or, conversely, were regarded as being eligible for classification from this standpoint.
Part II describes the small scale fire test method whereby the Steiner fire test chamber is used to evaluate roof deck constructions for resistance to underdeck fire spread. The conditions of acceptance under this test method were initially established by analysis of correlative data developed on a specific construction which exhibited adequate performance in the large scale fire test method described in Part I. This construction consisted of a steel roof deck, without vapor retarder or adhesives, insulated with one inch thick plain vegetable fiberboard roof insulation mechanically attached and covered with a three ply bitumen built-up roof covering with gravel surface. Subsequent Part I large scale tests were conducted with other steel deck constructions. These results continued to support the conditions of acceptance established for the Part II small scale tests.
For roof deck constructions dissimilar to any constructions previously evaluated under Part I, the large scale fire test method is to be conducted.
These requirements do not include tests to evaluate other potential hazards to roof deck constructions, such as structural integrity under fire exposure or wind uplift.
Two fire test methods are described in Parts I and II of this Standard. One of these test methods shall be selected based on assessment of fire test experience, as outlined in 1.4, 1.5 and 1.6.
Part I describes the large scale fire test method used to evaluate roof deck constructions which by experience in actual installations were known to have contributed extensively to underdeck fire spread or, conversely, were regarded as being eligible for classification from this standpoint.
Part II describes the small scale fire test method whereby the Steiner fire test chamber is used to evaluate roof deck constructions for resistance to underdeck fire spread. The conditions of acceptance under this test method were initially established by analysis of correlative data developed on a specific construction which exhibited adequate performance in the large scale fire test method described in Part I. This construction consisted of a steel roof deck, without vapor retarder or adhesives, insulated with one inch thick plain vegetable fiberboard roof insulation mechanically attached and covered with a three ply bitumen built-up roof covering with gravel surface. Subsequent Part I large scale tests were conducted with other steel deck constructions. These results continued to support the conditions of acceptance established for the Part II small scale tests.
For roof deck constructions dissimilar to any constructions previously evaluated under Part I, the large scale fire test method is to be conducted.