The Ontario Building Code | Protection
6.2.9.5. Protection
(1) Where a pipe carrying steam or hot water at a temperature above 120°C passes through a combustible floor, ceiling or wall, the construction shall be protected by a sleeve of metal or other noncombustible material not less than 50 mm larger in diameter than the pipe.
(2) Unprotected steam or hot water pipes that pass through a storage space shall be covered with not less than 25 mm of noncombustibleinsulationhttp://thehandyforce.com/insulation/" title ="Toronto home insulation">insulation to prevent direct contact with the material stored.
In Plain Language
Where a pipe carrying steam or hot water above 120 degrees Celsius passes through a combustible floor, ceiling, or wall, that penetration must be protected by a metal or noncombustible sleeve of adequate size.
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.