16 cmu block
 

16" cmu block
is there such a thing as 16" concrete masonry units? i have seen 14", but am told in the us-midwest 16" does not exist.
the standard sizes are 4,6,8,10, and 12" cmu's. in addition to the 鈥渟tandard鈥?sizes 16" is custom order. concrete brick is available in typical lengths of 8 and 16 in. (203 and 406 mm), nominal 4 in. (102 mm) width, and a wide range of heights. they may be 100% solid, or may have two or three cores. like astm c 90, standard specification for concrete building brick, astm c 55 (ref. 4), permits overall unit dimensions to vary +1/8 in. (3.2 mm) from the dimensions specified by the manufacturer. nominal dimensions of modular concrete brick equal the actual dimensions plus 3/8 in. (9.5 mm), the thickness of one standard mortar joint. however, nominal dimensions of nonmodular sized concrete brick usually exceed the standard dimensions by 1/8 to 1/4 in. (3.2 to 6.4 mm).
standard specification for load-bearing concrete masonry units, astm c 90 is the most frequently referenced standard for concrete masonry units. astm c 90 includes minimum face shell and web thicknesses for the different sizes of concrete masonry units. overall unit dimensions (height, width, or length) are permitted to vary by +1/8 in. (3.2 mm) from the dimensions specified by the manufacturer. where required, units may be manufactured to closer tolerances than those permitted in astm c 90. astm c 90 also defines the difference between hollow and solid concrete masonry units. the net cross-sectional area of a solid unit is at least 75% of the gross cross-sectional area.