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Proposed stairs for a townhouse project. Each flight of stair connecting two floors is indicated to comprise a straight run, a winder and a curved run, all meeting the requirements of Section 9.8 of the 1990 Ontario Building Code (OBC).
Section 9.8 of the OBC sets out the requirements for regular stairs (straight runs) under Subsections 9.8.3 and 9.8.4., for curved stairs under Articles 9.8.5.1. and 9.8.5.2, and for winders under Article 9.8.5.3. However, this section does not explicitly restrict how these three types of stairs can be combined. In consequence, it is the opinion of this Branch that your proposed stair arrangement meets the intent of Section 9.8 of the OBC.
October 16, 1996
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