The Ontario Building Code | Increase in Occupant Load
220.127.116.11. Increase in Occupant Load
(1) Where the performance level of an existing buildingis reduced under Sentence 18.104.22.168.(1), (2) or (3), the buildingshall be evaluated, and the early warning and evacuation systems shall be upgraded, in conformance with the applicable requirements of Table 22.214.171.124.
(2) Sentence (1) does not apply in a Group C occupancy where the new total occupant load is,
(a) 14 persons or fewer in a boarding, lodging or rooming house, except that where theoccupant load is between 10 and 15 persons, an interconnected system of smoke alarms in corridors near stairways is required, or
(b) 16 persons or fewer in a building containing residential suiteswhich are dwelling units, except that where the occupant load is between 10 and 17 persons, an interconnected system of smoke alarms in corridors near stairways is required.
(3) Where the performance level of an existing buildingis reduced under Sentence 126.96.36.199.(1), additional constructionshall be required in order that the building or part of the building subject to the increase in occupant load conforms to the requirements of Sentence 188.8.131.52.(2), Subsection 3.7.4. and Article 184.108.40.206.