This specification covers hollow and solid (see 5.3 and 5.4) concrete masonry units made from hydraulic cement, water, and mineral aggregates with or without the inclusion of other materials. There are three classes of concrete masonry units: Normal Weight, Medium Weight, and Lightweight. These units are suitable for both load bearing and non-load bearing applications. This standard covers hollow blocks from sizes of 3in. (76.2mm) to 8 in. (203.2mm).

Concrete masonry units covered by this specification are made from lightweight or normal weight aggregates, or both.

• Year of Declaration: 2024
• Reference:
• Number of Pages: 15
• Code: GYS 215
• Version: Second Revision
• ICS Number: 91.100.30