Code Library › Volume 1 › Section 3.1 — General
PART 3 — FIRE PROTECTION, OCCUPANT SAFETY AND ACCESSIBILITYUpdated for the 2024 Ontario Building Code

3.1.6.16.Exposed Construction Materials and Components in Concealed Spaces

(1) Except as provided in Sentence (2) and Article 3.1.11.7., and except as otherwise provided in this Subsection, only construction materials and components permitted in noncombustible construction shall be permitted to have exposed surfaces in concealed spaces within floor, roof and wall assemblies permitted in a building or part of a building permitted to be of encapsulated mass timber construction. (2) Exposed surfaces are permitted in a concealed space created by the attachment of a material or assembly of materials conforming to Sentence 3.1.6.4.(1), provided the concealed space is not more than 25 mm deep.
← Previous3.1.6.15. Combustible Elements in PartitionsNext →3.1.6.17. Penetration by Outlet Boxes

Common questions about this part of the code

Which buildings fall under Part 3 of the Ontario Building Code?How is major occupancy classified under the Ontario Building Code?How are building height and building area determined under the Ontario Building Code?What is a high building under the Ontario Building Code?

Understand this provision in seconds

BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.

Try BUILDAiD Beta

Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.