CMU – ASTM C90-11a
Load-bearing Concrete Masonry Units are made from hydraulic cement, water, and mineral aggregates. Design elements will impact additional materials needed for CMU installation; Water Penetrating Resistance (below-grade, wind driven rain) and Crack Control (restrained or differential movement) are two of the more impactful factors.
- Tolerances of + or – 1/8″
- Typical weight between 85 – 145 lb/cubic ft ea.
- Used in coordination with steel reinforcement to achieve engineered compressive loads
CMU is often applied with a MASONRY VENEER SYSTEM in mind. Embedded Flashing, Anchors/Ties, and Lintels apply for differing scenarios. Cavities between CMU and Masonry Veneer can also incorporate further Waterproofing and Insulating products to address varying engineering needs.
CMU varies in 2 weights; Normal, and Lightweight. Design features like Texture, Bond, Finish, Color, Strength, Fire Rating, R-Value, and Acoustics can be available by the manufacture for incorporation into an intended design. Many design elements can also require additional materials for proper CMU installation.
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