Ontario Building Code - Section 824

9.15.4.2. 2024 Building Code Compendium 114 Division B – Part 9 Table 9.15.4.2.-B Reinforced Concrete Block Foundation Walls Laterally Supported at the Top (1) Forming Part of Sentence 9.15.4.2.(3) Maximum Height of Finished Ground Above Basement Floor or Crawl Space Ground Cover, m (2) Size and Spacing of Continuous Vertical Reinforcement, M at mm o.c. 190 mm Minimum Wall Thickness 240 mm Minimum Wall Thickness Foundation Wall Height Foundation Wall Height  2.5 m  2.75 m  3.0 m  2.5 m  2.75 m  3.0 m 0.8 (3) (3) (3) (3) (3) (3) 1.0 (3) 1-15M at 1 800 1-15M at 1 800 (3) (3) (3) 1.2 (3) 1-15M at 1 600 1-15M at 1 600 (3) 1-20M at 2 000 1-20M at 2 000 1.4 1-15M at 1 600 1-15M at 1 600 1-15M at 1 600 (3) 1-20M at 1 800 1-20M at 1 800 1.6 1-15M at 1 400 1-15M at 1 400 1-15M at 1 400 (3) 1-20M at 1 600 1-20M at 1 600 1.8 1-15M at 1 400 1-15M at 1 400 1-15M at 1 200 (3) 1-20M at 1 600 1-20M at 1 600 2.0 1-15M at 1 200 1-15M at 1 000 or 1-20M at 1 200 2-15M at 1 200 1-20M at 1 600 1-20M at 1 600 1-20M at 1 600 2.2 2-15M at 1 200 2-15M at 1 000 2-15M at 1 000 1-20M at 1 400 1-20M at 1 400 1-20M at 1 400 2.4 2-15M at 1 000 2-15M at 1 000 2-15M at 800 1-20M at 1 400 1-20M at 1 400 1-20M at 1 200 2.6 n/a 2-15M at 800 or 1-25M at 1 000 2-15M at 800 or 1-25M at 1 000 n/a 1-20M at 1 000 1-20M at 1 000 2.8 n/a n/a 1-20M at 600 n/a n/a 1-20M at 800 or 2-15M at 1 000 3.0 n/a n/a 1-20M at 400 or 1-25M at 600 n/a n/a 2-15M at 800 Notes to Table 9.15.4.2.-B: (1) See Article 9.15.4.3. (2) See Article 9.15.4.6. (3) No reinforcement required. 9.15.4.3. Foundation Walls Considered to be Laterally Supported at the Top (1) Sentences (2) to (4) pertain to lateral support for walls described in Sentence 9.15.4.2.(1). (2) Foundation walls shall be considered to be laterally supported at the top if (a) such walls support a solid masonry superstructure or flat insulating concrete form wall, (b) the floor joists are embedded in the top of the foundation walls, (c) the floor system is anchored to the top of the foundation walls with anchor bolts, in which case the joists may run either parallel or perpendicular to the foundation walls, or (d) they extend from the footing to no more than 300 mm above the finished ground level and are backfilled on both sides such that the difference in elevation between the finished ground levels on either side of the wall is no more than 150 mm.