The Ontario Building Code | Compressive Strength
9.20.2.7. Compressive Strength
(1) The compressive strength of concrete blocks shall conform to Table 9.20.2.7.
Table 9.20.2.7.
Compressive Strength of Concrete Blocks
Forming Part of Sentence 9.20.2.7.(1)
| Item | Column 1 | Column 2 | Column 3 |
|
| Type of Block | Minimum Compressive Strength Over Net Area, MPa |
|
|
|
| Exposed to Weather | Not Exposed to Weather |
| 1. | Solid or hollow concrete blocks | 15 | 10 |
| 2. | Solid loadbearing cellular blocks | Not permitted | 5 |
| 3. | Solid non-loadbearing cellular blocks | Not permitted | 2 |
9.20.3. mortar
In Plain Language
Masonry units must achieve the minimum compressive strength set out in this article, ensuring adequate structural capacity.
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.