Type x fire rated gypsum drywall that is 5 8 inch 15 9mm thick and installed on each side of nominal 2 inch x 4 inch 38x89mm wood studs spaced 16 inch 400mm o c.
Beetlekill siding class c fire rating.
Fire ratings for roofs are classified as either class a class b class c or are unrated if a roof covering cannot meet the requirements for any of these classifications.
Roofing products with a class a rating will last 2 to 4 hours before igniting.
Or 3 5 8 inch 610 mm steel studs spaced 24 o c.
Non classified roof systems have no fire rating.
Rollex navigator steel siding for example has a class a fire rating.
The highest rating possible for fire resistance.
Tested roof systems are fire classified class a b or c where the most fire resistant roof assemblies are class a and class c is least resistant.
An alternative to vinyl siding fiber cement a mixture of cement sand and wood fibers manages to achieve very high fire resistance without sacrificing convenience and durability many fiber cement products carry a class a fire rating meaning that they can withstand several hours of heat before melting down.
Class c fire retardant treatment a product that is effective against light fire exposures.
Has a minimum fire rating for the assembly of 1 hour which is a typical requirement for many building codes.
Class b roofing will last about one hour while class c will only last about 20 minutes.
What is the fire rating.
A class a rating means it is going to offer the maximum protection possible.
In this case the class a highest degree of fire resistance b or c rating provides relative information about the ability of the roof covering and assembly to resist the penetration of fire as a result of a standard fire exposure astm e 108.
Type c fire rated drywall sometimes referred to as improved.
Steel siding not only offers protection against a fire it is also naturally resistant and does not require the use of fire resistant treatments.
All lp smartside siding can be used in a 1 hour fire rated assembly when it is installed over 5 8 type x gypsum which is consistent with other siding types such as fiber cement siding.
Under such exposures roof coverings of this class are not readily flammable afford a measurable degree of fire protection to the roof deck do not slip from position and pose no flying brand hazard.
The tests used to determine the fire ratings for roofs also provide fire resistance information.
Note that a class c roof system is considered fire resistant while a class c or iii building material as above is not.
Fiber cement can withstand high heat from fires.
Lp smartside is a class c iii rated product when tested according to astm e84.
The astm d 2898 standard rain test the highest fire classification is class a.
Hourly fire resistance ratings hourly ratings are a function of the assembly being used.
Class a is the highest rating offering the highest resistance to fire and unrated is the worst.
