The Ontario Building Code | Area Limits for Wired Glass and Glass Block
3.1.8.16. Area Limits for wireref ="http://thehandyforce.com/electrical/" title ="Electricians in East York">wired glass and glass Block
(1) Except as permitted by Article 3.1.8.17., the maximum area of wireref ="http://thehandyforce.com/electrical/" title ="Electricians in East York">wired glass in a door used in the locations shown in Table 3.1.8.15. shall conform to the Table.
(2) Except as permitted by Article 3.1.8.17., the maximum area of glass block and wireref ="http://thehandyforce.com/electrical/" title ="Electricians in East York">wired glass panels not in a door, used in the locations shown in Table 3.1.8.15., shall conform to the Table.
In Plain Language
Table 3.1.8.15 also caps how much wired glass or glass block area is allowed in doors (and in panels not in doors) at the locations it covers, balancing visibility against fire containment.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.