Firebrick Liners
(1) Fireplace liners shall be not less than,
(a) 50 mm thick for the sides and back, and
=
(b) 25 mm thick for the floor.
(2) Firebrick liners shall be laid with high temperature cement mortar conforming to CAN/CGSB-10.3, “Air Setting Refractory Mortar”.
(3) Joints between a firebrick liner and the adjacent back-up masonry shall be offset.
Article 9.22.2.2. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.