The Ontario Building Code | Manholes Manholes

(1) A manhole including the cover shall be designed to support all loads imposed upon it.

(2) A manhole shall be provided with,

(a) a cover which shall provide an airtight seal if located within a building,

(b) a rigid ladder of a corrosion-resistant material where the depth exceeds 1 000 mm, and

(c) a vent to the exterior if the manhole is located within a building.

(3) A manhole shall have a minimum horizontal dimension of 1 200 mm, except that the top 1 500 mm may be tapered from 1 200 mm down to a minimum of 600 mm at the top.

(4) A manhole in a sanitary drainage systemshall be channelled to direct the flow of effluent.