- Concrete Masonry Unit (CMU)
- Fundamental component of a masonry wall
- Strength of the block is a key component in the strength of the wall
- Check local manufacturers for available typical block strength
- Typically CMU comes in “normal weight”, “medium weight” or “lightweight”
- check with local suppliers for regional preferences
- CMU now with reduced web thickness for improved R-values
regular/stretcher 
bond beam 
open cell 
knockout bond beam