Draftstopping In Attics

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.

Draftstopping in attics.

Draftstopping is used to subdivide flooring at specific intervals and in attics and crawl spaces. 4 2 penetrations and joints. 1 if there is no useable space above the assembly an attic or below it a. Per the ibc commentary draftstopping in attics is required for the following reasons.

Draftstopping shall be located above and in line with the dwelling unit and sleeping unit separations. Draftstopping shall be provided in attics mansards overhangs or other concealed roof spaces of group r 2 buildings with three or more dwelling. Some codes include other draftstopping materials such as gypsum board cement fiber board or particleboard. This self closing and self latching access door allows for access from both sides of the door.

Draftstopping is not required in buildings equipped throughout with an automatic sprinkler system in accordance with section 903 3 1 1. It is intended to separate the buildings horizontally it acts as a barrier to smoke and gases it is designed to prevent considerable damage from fire spread. 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. 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.

Multi unit housing projects are often draftstopped at specific intervals to prevent fire from jumping between adjacent units via a common attic space. 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. 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. In combustible construction nearly all the codes specify that lumber or wood structural panels may be used for this purpose.