Preferred Materials manufactures concrete block to be used in masonry-style construction. These blocks can be made with normal weight or light weight aggregates and are formed in many shapes and sizes. When reinforced with concrete columns and tie beams, load bearing walls created from these block are used to build all types of structures, both commercial and residential.
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For additional information, view this PDF with visual representation of columns and pilaster block units; 4″, 6″, 8″, 10″, 12″ wide block units; and round block units.