Draftstopping In Attics
Similar to fireblocking draftstopping is installed to prevent the movement of air within open building areas and is most often installed in crawl spaces attics and floor assemblies.
Draftstopping in attics. Some codes include other draftstopping materials such as gypsum board cement fiber board or particleboard. Multi unit housing projects are often draftstopped at specific intervals to prevent fire from jumping between adjacent units via a common attic space. Even when sprinklers aren t required in attics by the nfpa installation standard they are sometimes needed by virtue of a building code allowance such as draftstopping. Draftstopping shall be located above and in line with the dwelling unit and sleeping unit separations.
Draftstopping where useable space is both above below concealed space of floor ceiling assemblies concealed space not to exceed 1 000 sfon each side of draftstop approximately of equal sizes there are some points to be made about the draftstoppingrequirements. Draftstopping shall be provided in attics mansards overhangs or other concealed roof spaces of group r 2 buildings with three or more dwelling. Draftstopping is not required in buildings equipped throughout with an automatic sprinkler system in accordance with section 903 3 1 1. Draftstopping shall be installed in attics and concealed roof spaces such that any horizontal area does not exceed 3 000 square feet 279 m 2.
The babcock davis draft stop door is a non rated access door designed to provide access through draft stop spaces in the attic while preventing a back draft from one section of the attic to another. Per the ibc commentary draftstopping in attics is required for the following reasons. Draftstopping shall be provided in floor ceiling spaces in group r 1 buildings in group r 2 buildings with three or more dwelling units in group r 3 buildings with two dwelling units and in group r 4 buildings. 4 2 penetrations and joints.
This self closing and self latching access door allows for access from both sides of the door. Los angeles building code 7 fire and smoke protection features 718 concealed spaces 718 4 draftstopping in attics 718 4 2 groups r 1 and r 2. The international building code section 717 4 in the 2009 edition requires draftstopping to subdivide attics and concealed roof spaces of combustible construction. 1 if there is no useable space above the assembly an attic or below it a.