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en.wikipedia.org/wiki/Concrete_masonry_unit

A concrete masonry unit (CMU) is a standard size rectangular block used in building construction. Those that use cinders are called cinder blocks in North America, breeze blocks in the United Kingdom, and hollow blocks in the Philippines. In New Zealand they are known as concrete blocks or more commonly as just blocks ...

specblockusa.com/downloads/gray-block/size-shape-2013.pdf

Comment: ASTM C-90 is the standard of masonry production specifications in the United. States. With the approval of ACI 530.1-88 specifications and the issue of ASTM C-90-91, there is one major specification change to note. In the past, block compressive strength (psi) was based on gross area requiring an average.

www.archtoolbox.com/materials-systems/masonry/concblocksizes.html

Concrete masonry Unit (CMU) sizes for standard CMUs - includes both nominal and actual dimensions. Covers concrete block sizes from 4" CMU through 12" CMU.

www.engineeringtoolbox.com/concrete-masonry-blocks-d_1731.html

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to ...

www.alliedconcrete.com/wp-content/uploads/2010/04/CMU-Catalog.pdf

size are manufactured to specified face dimensions within tolerances specified in applicable referenced ASTM specification. A. Manufacture concrete masonary units specified dimensions of 3/8 inch less than nominal widths by nominal heights by nominal lenghts. 2. Provide special shapes where indicated and as follows:.

www.angelusblock.com/products/cmu_size.cfm

How concrete masonry unit (cmu) sizes are called out is actually quite specific, and are texture-specific related to nominal versus actual dimensions. ... Actual dimensions are the measured dimensions of the unit. ASTM Standards allow the actual dimensions a permissible variation from the specified dimension. For example ...

www.angelusblock.com/docs/Angelus_Dimensions.pdf

of masonry units or the construction of masonry. Design calculations are based on specified dimensions. Concrete masonry unit (cmu) specified dimensions compensate for a 3/8. (0.375) inch joint for precision and split ... are the measured dimensions of the unit. ASTM Standards allow the actual dimensions a permissible.

www.countymaterials.com/en/products/masonry/concrete-masonry-units/standard-concrete-units/item/standard-cmu-shapes-sizes

Standard CMU Shapes & Sizes. County Materials manufactures standard and speciality concrete block units that exceed industry standards. Our state-of-the-art production facilities ensure products with high quality and strength and consistent sizes. We offer a variety of shapes and sizes to offer optimal design flexibility.

www.ncma-br.org/pdfs/5/TEK%2002-01A.pdf

TEK 2-1A. Unit Properties (2002). Keywords: architectural units, bond beams, concrete brick, dimensions, equivalent thickness, lintels, screen block, sizes and shapes. Figure 2—Typical Concrete Masonry Units. Double corner or plain end unit. Stretcher unit. Single corner unit. Corner return unit. Concrete brick ...