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Brickwork

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Brickwork is a form of masonry produced by a skilled worker known as a bricklayer. It involves the systematic arrangement of bricks and mortar to create durable structures like walls and buildings.

Brickwork in Flemish Bond
Brickwork in Flemish Bond

This technique is essential for construction because it allows for the creation of massive, stable, and often decorative architectural features. By stacking individual units in organized rows, builders can control the height, thickness, and strength of a structure.

To understand how brickwork functions, one must look at the relationship between the bricks and the mortar. Bricks are laid in horizontal rows called courses. A course is defined as the bricks contained between two planes parallel to the horizon.

Brickwork dbl flem 1 thickness
Brickwork dbl flem 1 thickness

Between these bricks, mortar is applied to act as a binding agent. Mortar placed horizontally below or on top of a brick is called a bed. Mortar placed vertically between two bricks is called a perpend, or a head joint in the United States.

This layering process ensures that the weight of the structure is distributed across the surfaces.

Bricks are not all identical in shape or design. A solid brick has simple, rectilinear dimensions with no extra features. Some bricks feature a depression on one or both beds known as a frog.

Single frogged brick
Single frogged brick

These are called frogged bricks, and the frog should not exceed 20% of the total volume. If the depression is larger than 20%, the brick is classified as a cellular brick.

Cellular brick
Cellular brick

Other types include perforated bricks, which have holes that pass entirely through the unit from bed to bed.

Perforated brick 2
Perforated brick 2

Builders often use face bricks for visible external surfaces because they are higher quality. In contrast, filler bricks are used for internal parts or areas that will be covered by a coating like stucco.

Precision in measurement is vital for successful construction. Engineers use two types of measurements: working dimensions and co-ordinating dimensions. Working dimensions, or nominal size, refer to the manufactured size of the brick. Co-ordinating dimensions include the actual physical size of the brick plus the required mortar on one header face, one stretcher face, and one bed.

Coordinating dimensions
Coordinating dimensions

In the United Kingdom, a common standard for a brick is 215 mm by 102.5 mm by 65 mm.

Brick laying 2
Brick laying 2

When using 10 mm mortar beds and perpends, the math works perfectly. For example, the 215 mm length of one brick equals the width of two bricks (102.5 mm each) plus one 10 mm perpend.

Brickwork has a very long history spanning thousands of years. Some of the earliest examples of brickwork involved bricks that were simply dried rather than fired. These ancient structures can be found in places like Jericho in Palestine and Çatal Höyük in Anatolia.

Courtyard 2, yemen
Courtyard 2, yemen

Fired-brick construction appeared later in history. The buildings of Mohenjo-daro in modern-day Pakistan were built around 2600 BC. Later, around 1400 BC, the ziggurat of Dur-Kurigalzu in Iraq utilized fired-brick faces. This progression from dried to fired bricks shows how humans improved the durability of their buildings over time.

Builders also use different orientations to change the appearance and function of a wall. A brick has six surfaces: top and bottom beds, narrow header faces, and wide stretcher faces.

Faces of brick
Faces of brick

When a brick is laid flat with its long narrow side exposed, it is a stretcher. If the narrow end is exposed, it is a header.

Brickpositions
Brickpositions

Bricks can also be stood vertically. A soldier is a brick laid vertically with its long narrow side exposed, while a sailor is a brick laid vertically with its broad face exposed. Other positions include the rowlock, which is laid on its long narrow side with the short end exposed, and the shiner, which is a rowlock stretcher.

To ensure maximum strength, bricklayers follow the principle of bonding. This means that perpends should not be contiguous, or lined up, across different courses.

Brickwork dbl flem 1 thickness
Brickwork dbl flem 1 thickness

Instead, the vertical joint of one course should be covered by the center of a brick in the course above it. This overlapping pattern creates an inseparable mass. This method is also used to bond different "leaves" or layers of a wall together. A single-leaf wall is half a brick thick, while a wall that is "one brick thick" is as wide as the length of a single brick. This structural logic allows brickwork to relate to broader engineering systems, providing stability through geometry and friction.

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🖼️ Images & Media (32)
File:Hampton stacks.JPG
Hampton stacks.JPG
File:Fennicum 2019.jpg
Fennicum 2019.jpg
File:Courtyard 2, yemen.jpg
Courtyard 2, yemen.jpg
File:John Young's polychromatic brickwork - an example.jpg
John Young's polychromatic brickwork - an...
File:Coordinating dimensions.jpg
Coordinating dimensions.jpg
File:Brick laying 2.jpg
Brick laying 2.jpg
File:Faces of brick.jpg
Faces of brick.jpg
File:Brick terminology.jpg
Brick terminology.jpg
File:Single brick.jpg
Single brick.jpg
File:Single frogged brick.jpg
Single frogged brick.jpg
File:Double frogged.jpg
Double frogged.jpg
File:Cellular brick.jpg
Cellular brick.jpg

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