The Ontario Building Code | Construction Index and Hazard Index
188.8.131.52. Construction Index and Hazard Index
(1) Where proposedconstruction will result in the change of major occupancy of all or part of an existing building to another major occupancy, the building shall be classified as to its,
(a) construction on the basis of its construction index as provided for in this Part, including Table 184.108.40.206.A., and
(b) occupancyon the basis of its hazard index as provided for in this Part, including Tables 220.127.116.11.B. to 18.104.22.168.N.
(2) Small or medium sized existing buildings as determined in Tables 22.214.171.124.B. to 126.96.36.199.N. facing multiple streetsmay be assigned a hazard index credit of 1, which may be subtracted from the hazard index of the proposed major occupancy to reduce the additional upgrading required by Table 188.8.131.52.A. provided,
(a) the buildingdoes not contain a Group B, Division 1, a Group C, or a Group F, Division 1 occupancy, and
(b) firefighting access complying with Articles 184.108.40.206. to 220.127.116.11. or Subsection 9.10.20. is provided.
(3) The requirements of Articles 18.104.22.168. to 22.214.171.124. do not apply to this Part.