Non-modular ranges reflect BIA’s published typical dimensions; exact manufacturer products vary. Do not assume every producer’s Queen or King brick is identical.

BIA recommends specifying brick dimensions in the order width x height x length, with the brick in its stretcher position. Using this consistent order avoids confusion between a brick’s wall-depth dimension and its face dimensions.

Modular coordination reduces cutting and simplifies layout since brick courses align cleanly with door and window openings, wall lengths, and other construction dimensions built on the same grid.

Queen brick reduces unit count compared with Modular brick because of its larger face area, while King brick reduces it further still. Both are non-modular, so exact specified dimensions vary by manufacturer; always confirm actual product dimensions before ordering or laying out coursing.

“Standard” brick is not a universally exact U.S. size; BIA lists it as a non-modular family with a dimensional range. “Engineer” in a brick name commonly indicates a taller brick geometry, not a specific compressive strength. Do not assume an Engineer-designated brick automatically carries a particular strength rating solely because of its name.

Larger units like Utility brick reduce both brick count and total mortar-joint area per wall face. BIA notes that brick approximately three times as long as they are wide, such as Utility, are often better suited to one-third running bond than standard half-running bond.

Manufacturer availability for large-format units varies significantly by region; confirm local supply before specifying a large-format brick for a project.

ASTM C652 defines hollow brick as a unit whose net cross-sectional area in the applicable plane is less than 75 percent of its gross cross-sectional area. This is a structural classification, not a separate dimension-naming system from solid brick.

• Cores and frogs: Voids or depressions in the brick body that reduce net cross-sectional area.
• Cells: Larger void spaces in hollow units, sometimes used for reinforcement or utilities.
• Gross area vs. net area: Gross area includes voids; net area excludes them.
• Shell/web construction: The remaining solid material framing the void spaces in hollow units.

Do not equate the everyday phrase “solid brick” with a brick containing absolutely no holes. Under ASTM C216, a brick is considered solid if it has no voids or if its voids do not exceed the applicable percentage threshold defined for that classification. Hollow brick under ASTM C652 has a distinct 75-percent net-area threshold.

These are performance and specification categories, not dimensional size names. A brick can be manufactured to Modular dimensions and separately classified under either C216 or C62, depending on its intended appearance requirements.

• Width: The wall-depth dimension, visible in a header course.
• Height: The vertical course dimension.
• Length: The horizontal face dimension, visible in a stretcher course.

Orientation changes what dimension is visible: headers show the width and height, stretchers show the length and height, soldiers show the width and length turned vertically, and rowlocks show the height and length with the brick laid on its side.

Head joints (vertical, between brick ends) and bed joints (horizontal, between courses) both contribute to the finished module. If the joint thickness changes from the assumed 3/8 inch, the nominal module changes correspondingly, and any coursing or layout calculated for one joint size does not automatically apply to another.

Coursing per foot: for standard Modular coursing (3 courses = 8 in.), there are approximately 4.5 courses per foot.

Brick length plus head joint determines wall layout along the 4-inch and 8-inch modular grid. BIA notes that contemporary modular brickwork commonly uses a 4-inch grid to coordinate brick masonry with other construction, including door and window openings, wall returns, and corners. Designing wall lengths and openings on this grid minimizes brick cutting.

Longer brick families such as Utility, which are roughly three times as long as they are wide, often work better in one-third bond than in standard half-bond, since a one-half offset on a very long unit can create awkward vertical joint alignment.

These are reference estimating values with a 3/8-inch joint, before waste and bond-pattern corrections. Using bricks-per-square-foot figures from one joint thickness with a different actual joint will produce an inaccurate estimate.

Values are theoretical, before waste and special bond adjustments. Add a waste allowance and adjust for openings, corners, and headers for an actual material order.

Larger units generally require somewhat more mortar volume per brick, but fewer total bricks per wall area. This is secondary to the main brick-size intent of this page; for full mortar proportioning, see the Mortar Mix Ratio Chart and Mortar Mix Calculator.

• Brick veneer: A single wythe of brick applied as a nonstructural facing over a structural backup wall.
• Single wythe: One brick thickness in the wall cross-section.
• Multiwythe masonry: Two or more brick thicknesses, sometimes with a collar joint or cavity between them.
• Cavity walls: Wythes separated by an air space, often with insulation.

The 2024 IRC limits masonry veneer thickness, weight, and height depending on seismic category and framing conditions; do not imply that every 4-inch-nominal brick wall is structurally equivalent, since veneer and structural brick assemblies carry different design requirements.

Brick weight varies by unit dimensions, void percentage, clay body composition, moisture content, and manufacturer. There is no single universal weight for “standard brick.” Larger gross volume generally increases comparative weight for a given clay body and void ratio, but exact weight depends on the specific manufacturer’s product data; consult the manufacturer’s technical data sheet for design or shipping weight calculations rather than assuming one figure applies to every brick of a given nominal size.

Distinguish exact mathematical conversions from rounded industry metric references. Both are shown here for clarity.

ASTM C216 includes dimensional variation requirements that differ by brick type and classification. The final specification should reference the exact current table conditions for the applicable type rather than one universal plus-or-minus dimension for all brick.

These classifications relate to appearance, dimensional variation, and intended aesthetic tolerance under ASTM C216, not separate nominal brick sizes. A Modular-sized brick can be produced in any of these three types depending on the desired appearance.

Grade selection is durability-related and does not determine the physical dimensions of the brick; a brick’s grade and its size designation (such as Modular or Queen) are independent classifications under ASTM C216 and C62.

1. Identify the brick designation (Modular, Queen, King, etc.).
2. Record the specified width x height x length dimensions.
3. Measure several representative units if inspecting field stock, since individual bricks vary within tolerance.
4. Confirm the intended mortar-joint width for the project.
5. Confirm the intended coursing.
6. Check the project specification for the exact required ASTM classification.
7. Verify special shapes (corners, closures) separately from standard units.

Follow BIA’s recommendation to specify exact dimensions rather than relying only on the trade name, since names like Queen, King, and Standard vary by manufacturer and region.

1. Determine whether the application is structural or veneer.
2. Determine the desired architectural appearance.
3. Check local manufacturer availability.
4. Select a modular or non-modular layout approach.
5. Consider the intended bond pattern.
6. Check the required wall thickness.
7. Verify coursing around openings.
8. Estimate brick and mortar quantity.
9. Confirm applicable ASTM requirements.
10. Specify exact width x height x length dimensions in the final order.

Larger units generally reduce unit count and mortar joints per wall area but change appearance, detailing, and coursing options; weigh this labor/material tradeoff against the project’s architectural goals.