The Ontario Building Code | Access to Above Grade Storeys
22.214.171.124. Access to Above Grade Storeys
(1) Except for storeys below the first storey, direct access for firefighting shall be provided from the outdoorref ="http://thehandyforce.com/doors/" title ="Toronto Door installer">doors to every storey that is not sprinklered and whose floor level is less than 25 m above grade, by at least one unobstructed window or access panel for each 15 m of wall in each wall required to face a street by Subsection 3.2.2.
(2) An opening for access required by Sentence (1) shall,
(a) have a sill no higher than 1 070 mm above the inside floor, and
(b) be not less than 1 100 mm high by not less than,
(ii) 750 mm wide for a building designed for the storage or use of dangerous goods.
(3) Access panels above the first storeyshall be readily openable from both inside and outside, or the opening shall be glazed with plain glass.