1. Masonry units shall comply with
   1. ASTM C 73, "Calcium Silicate Brick (Sand-Lime Brick),"
   2. ASTM C 126, "Ceramic Glazed Structural Clay Facing Tile, Facing Brick, and Solid Masonry Units,"
   3. ASTM C 212, "Structural Clay Facing Tile,"
   4. CAN/CSA-A82, "Fired Masonry Brick Made from Clay or Shale,"
   5. CSA A165.1, "Concrete Block Masonry Units,"
   6. CSA A165.2, "Concrete Brick Masonry Units," or
   7. CSA A165.3, "Prefaced Concrete Masonry Units."

1. Used bricks shall be free of old mortar, soot or other surface coating and shall conform to Article 9.20.2.1.

1. Glass blocks shall not be used as loadbearing units or in the construction of fireplaces or chimneys.

1. Masonry made with cellular concrete shall not be used in contact with the soil or exposed to the weather.

1. Stone shall be sound and durable.

1. Concrete blocks exposed to the weather shall have density and water absorption characteristics conforming to concrete types A, B, C, or D described in CSA A165.1, "Concrete Block Masonry Units."

1. 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)