Just like regular concrete masonry units, these blocks are produced to the CSA Standard A165.1-04, however their strengths are much greater than the minimum that is the CSA requirement. Architect specifications often ask for higher concrete strengths in their designs. We are able to provide these higher strengths through special mix designs, on an as per needed basis. The higher strengths vary from 20MPa to 35MPa, in 5MPa increments, and are clearly marked on the block with a bolt marking, in the following manner:

15 MPa – no bolt marks

20 MPa – 1 bolt mark

25 MPa – 2 bolt marks

30 MPa – 3 bolt marks

35 MPa – 4 bolt marks