The Ontario Building Code | Spatial Separation
3.14.2.3. Spatial Separation
(1) Except as provided in Sentences (2), (3) and (4), air-supported structures shall not be erected closer than 3 m to other structures on the same property or to the property line.
(2) Air-supported structures not occupied by the public need not be separated from one another, and are permitted to be erected closer than 3 m from other structures on the same property where such closer spacing does not create a hazard to the building occupants or the public.
(3) Except as provided in Sentence (4), an air-supported structure is permitted to be attached to another buildingprovided the building to which it is attached,
(a) conforms to the requirements of other Parts of this Division based on the total building areas of the air-supported structure and the attached building,
(b) is sprinklered, and
(c) is separated from the air-supported structure by a fire separation having a fire-resistance ratingof not less than 1 h.
(4) An air-supported structure is permitted to be attached to another building provided the building to which it is attached,
(a) has a building area not more than 200 m2,
(b) conforms to the requirements of other Parts of the Code based on the building areaof the attached building, and
(c) is sprinkleredor separated from the air-supported structure by a fire separation having a fire-resistance rating of not less than 1 h.