The Ontario Building Code | Slope

9.8.5.4. Slope

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

(a) 1 in 10 for exterior ramps,

(b) 1 in 10 for interior ramps servingresidential occupancies,

(c) 1 in 6 for mercantileor industrial occupancies, and

(d) 1 in 8 for all other occupancies.