Sustainable and economical, ORCO manufactured concrete masonry units (CMUs) provide both structure and finish . . . with unsurpassed versatility ranging from mid-century modern to contemporary design and everything in between. Excellent fire resistance and thermal values make CMU an ideal choice for residential and commercial applications as well as schools and essential facilities. Plus, they’re decorative and provide accents for a wide variety of conditions. All structural CMU are manufactured to meet ASTM C-90 Standard Specification for Loadbearing Concrete Masonry Units.