This category,
Masonry Units, contains sites related to the Construction Specification Institute (CSI) numbered area for
Division 4, Masonry, which includes:
- 04210 Clay Masonry Units
- 04220 Concrete Masonry Units
- 04230 Calcium Silicate Units Masonry
- 04270 Glass Masonry Unit
- 04290 Adobe Masonry Unit
- Category ID : 47128