(1)  The slope of ramps shall be not more than,

    (a)   1 in 10 for exterior ramps,

    (b)   1 in 10 for interior ramps serving residential occupancies,

    (c)   1 in 6 for industrial occupancies, and

(d) 1 in 8 for all other occupancies.

Article 9.8.5.4 Ontario Regulation 332/12 Building Code,   O. Reg. 332/12: BUILDING CODE (ontario.ca) © Queen’s Printer for Ontario, 2021.