2 if the assembly isn t concealed an open floor ceiling assembly above a.
Attic draftstop required.
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Or above every two dwelling units.
Each side of draftstop approximately of equal sizes there are some points to be made about the draftstoppingrequirements.
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Draftstopping is required in concealed spaces in type v combustible construction to subdivide attic spaces.
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Draftstopping is not required in buildings equipped throughout with an automatic sprinkler system in accordance with section 903 3 1 1.
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1 if there is no useable space above the assembly an attic or below it a crawlspace draftstoppingisn t required.
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In occupancies in group r 2 that do not exceed four stories above grade plane the attic space shall be subdivided by draftstops into areas not exceeding 3 000 square feet 279 m 2 or above every two.
Draftstopping draftstop is defined by the international building code as.
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