Ibc Class B Roof Coverings

Class b roof assemblies and roof coverings shall be listedand identified as class b by an approvedtesting agency.

Ibc class b roof coverings.

The maximum flame spread is 6 feet for a class a rated roof 8 feet for class b and 13 feet for class c. Roofs shall have a class a roof assembly. Code interpretation this code implies that all roof materials that pass the testing provided in the astm e 108 fire testing under the light category are. Bf 1505 4 class c roof assemblies class c roof assemblies are those that are effective against light fire test exposure.

An example of an unrated covering is an untreated wood shake roof. Class b roof assemblies and roof coverings shall be listed and identified as class b by an approved testing agency. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. Section 1505 4 class c roof assemblies class c roof assemblies are those that are effective against light fire test exposure.

Over non combustible roof decks such as steel poured gypsum or concrete only the spread of flame on the top surface of the roof system is evaluated. For roof coverings where the profile allows a space between the roof covering and roof decking the space at the eave ends shall be firestopped to preclude entry of flames or embers or have one layer of 72 pound 32 4 kg mineral surfaced nonperforated cap sheet complying with astm d 3909 installed over the combustible decking. Class b roof assemblies are those that are effective against moderate fire test exposure. Class b roof assemblies are those that are effective against moderate fire test exposure.

Wuic 504 2 roof covering. Table 1505 1 requires minimum class b roof coverings for types ia ib iia iiia iv and va buildings. Class b roof assemblies class b roof assemblies are those that are effective against moderate fire test exposure. 1505 4 class c roof assemblies.

Class b roof as semblies are those that are effective against moderate fire test exposure. Examples of a class a roof covering include concrete or clay roof tiles fiberglass asphalt composition shingles and metal roofs. Bf 1505 4 class c roof assemblies class c roof assemblies are those that are effective against light fire test exposure. If wood shakes and shingles are impregnated with fire retardant chemicals they meet the requirements for a class b fire rating and can meet a class a rating if additional materials are included in.

Minimum class c roof coverings are required for types iib iiib and vb buildings. Class b roof assemblies and roof coverings shall be listed and identified as class b by an approved testing agency. Class c roof assem blies are those that are effective against light fire test exposure.