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Since 1962

Manufacturers of Quality Masonry Products

Precision Concrete Masonry Units

Precision concrete masonry units are the most widely utilized type of concrete block. Precision blocks have square edges and smooth texture that are most commonly associated with concrete block. When specifying concrete masonry units, the dimensions are indicated in the following manner: width x height x length. Dimensions of precision masonry units are usually expressed in terms of their nominal size, which is 3/8 of an inch greater than their actual size. This 3/8 of an inch difference accommodates the standard 3/8 inch mortar joint that is utilized with precision units. For example, a unit with the nominal dimensions of 8″ x 8″ x 16″ would have actual dimensions of 7 5/8″ x 7 5/8″ x 15 5/8″.

  • Precision Block Design Units
  • Precision Block Accessory Units
  • Precision Block Structural Accessory Units

Applicable Standards

The precision concrete masonry units manufactured by Air Vol Block, Inc. comply with the requirements of ASTM C-90 and section 21-4 of the uniform building code. Air Vol Block maintains an inventory of both lightweight and medium weight units. Normal weight units, also known as heavy weight units, are available as a special-order item. For more information regarding the ASTM standards pertaining to concrete masonry units, please contact our sales office.

Quality Assurance

Air Vol Block has on-site testing facilities in which we can test our products to ensure that they comply with the necessary specifications. Additionally, we participate in a testing program in which an independent laboratory randomly samples and tests our concrete masonry units.

Available Colors

Air Vol Block stocks a wide variety of precision units in natural Gray and our stock Nutan color. A wide variety of custom colors may be special ordered. Architects, Visit our Architect’s Corner to log-in to our complete color swatch page. Please contact your Air Vol Block representative for more information regarding costing of custom colors.

The raw materials utilized in the manufacture of concrete masonry units are subject to natural variations in color which affect the color of the finished product. It is important that our customers understand that color can be guaranteed only to a range of color. Even natural Gray units, which are manufactured without pigments, may have noticeable shade variations from run to run.

Available Sizes

Precision units are readily available in 4″ & 8″ heights. Available widths include 4″, 6″, 8″, 10″, 12″, and 16″. Please note that 10″ wide units are available by special order only.

Air Vol Block, Inc. is constantly adding new items to its product line. Please call our office if you have questions regarding additional shapes or sizes.

Mason Mix Mortar

Mason Mix Mortar

And for consistent quality and color, be sure to specify Mason Mix Mortar.

Common Shapes and Sizes
Precision Block 4″ Wide
4″ High
4x4x16 Standard
8″ High
4x8x8 Half 4x8x12 Corner 4x8x16 Standard
Precision Block 6″ Wide
4″ High
6x4x16 Bond Beam 6x4x8 Half 6x4x16 Standard
6x8x16 Bond Beam 6x8x8 Half 6x8x16 Standard
8″ High
6x8x18 Tongue & Groove(Special Order) 6x8x16 Double Open End Bond Beam(Special Order) 6x8x16 Mortarless Head Joint (Speed Block) 6x8x16 Return Corner
Precision Block 8″ Wide
4″ High
8x4x16 Open End 8x4x16 Bond Beam 8x4x8 Half 8x4x16 Standard
6″ HighIn precision block, Air Vol manufactures 8x6x16’s in a Standard open-end and a Bond Beam open-end.
8″ High
8x8x16 Open End 8x8x16 Bond Beam 8x8x8 Half 8x8x16 Standard
8x8x8 Lintel 8x8x16 Double Open EndBond Beam 8x8x16 Open EndBond Beam(Special Order) 8x8x16 Mortarless Head Joint(Speed Block)
12″ High
8x12x12 Standard(Special Order) 8x12x12 Bond Beam(Special Order)
Precision Block 12″ Wide
4″ High
12x4x16 Bond Beam 12x4x8 Half 12x4x16 Standard
8″ High
12x8x16 Mortarless Head Joint (Speed Block) 12x8x16 Bond Beam 12x8x8 Half 12x8x16 Standard
12x8x16 Double Open End Bond Beam 12x8x16 Open End Bond Beam(Special Order) 12x8x12 Column 12x8x16 Open End
Precision Block Design UnitsDesign units are available in most of the Air Vol Block precision block sizes. 8x8x16 blocks are only show below to illustrate the designs available. Please contact Air Vol Block, Inc. for more information on design units.
5-Score(Special Order) 3-Score(Special Order) 1-score(Special Order)
6x8x16 9-Score (Special Order) Combed Face(Special Order) 11-Score(Special Order)
Precision Block Accessory Units
9x4x8 sill(Special Order) 10x4x8 sill 8.5″x4x8 sill(Special Order)
4×2 3/8x8Conc. Brick 6x2x16 Cap 8x2x16 Cap 11x8x11 Pier Block
Precision Block Structural Accessory Units
Banjo Pilasters
12x8x16(Special Order) 16x8x16
Ring Pilasters
16x8x16 12x8x12
“C” Alternate
6x8x16(Special Order) 8x8x16
Radius Block
view dimensions
4 Radius blocks required per course to make complete circle. 12-inch Radius Block(Special Order)
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