(1)  The rise, which is measured as the vertical nosing-to-nosing distance, shall conform to Table 9.8.4.1.

Table 9.8.4.1.
Rise for Rectangular Treads, Tapered Treads and Winders and Run for Rectangular Treads

Forming Part of Sentences 9.8.4.1.(1) and 9.8.4.2.(1)

Notes to Table 9.8.4.1.:

⁽¹⁾ Private stairs are:

    (a)   interior stairs within a house or an individual dwelling unit,

    (b)   exterior stairs serving a house or an individual dwelling unit, and

    (c)   exterior stairs serving a garage that serves a house or an individual dwelling unit.

⁽²⁾ Public stairs are all stairs not described as service stairs or private stairs.

⁽³⁾ Service stairs are stairs that serve areas used only as service rooms or service spaces.

⁽⁴⁾ Stairs to unoccupied attic space are stairs that serve attics containing no storage or living space.

Article 9.8.4.1 Ontario Regulation 332/12 Building Code,   Information published by oncodes.ca for educational purposes only.