The Ontario Building Code | Group D, up to 6 Storeys

3.2.2.50. Group D, up to 6 Storeys

(1) A building classified as Group D is permitted to conform to Sentence (2) provided,

(a) it is not more than 6 storeys in building height, and

(b) it has a building area not more than the value in Table 3.2.2.50.

Table 3.2.2.50.
Maximum Building Area, Group D, up to 6 Storeys

Forming Part of Sentence 3.2.2.50.(1)

Item

Column 1

Column 2

Column 3

Column 4

No. of Storeys

Maximum Area, m2

Facing 1 Street

Facing 2 Streets

Facing 3 Streets

1.

1

not limited

not limited

not limited

2.

2

7 200

not limited

not limited

3.

3

4 800

6 000

7 200

4.

4

3 600

4 500

5 400

5.

5

2 800

3 600

4 320

6.

6

2 400

3 000

3 600

(2) The building referred to in Sentence (1) shall be of noncombustible construction, and,

(a) floor assemblies shall be fire separations with a fire-resistance rating not less than 1 h,

(b) mezzaninesshall have a fire-resistance rating not less than 1 h,

(c) roof assemblies shall have a fire-resistance rating not less than 1 h, except that in a building not more than 1 storeyin building height this requirement is waived, and

(d) loadbearingwalls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.