CMU Wall
CMU Wall
What Are Cmu Walls? | Cmu Wall Details (Cmu Block) | Functions of Cmu Walls

CMU Wall

What are CMU Walls?

CMU Wall is a term used to mean CMU Wall are eco-friendly and flexible building materials that can be used for various purposes. They are available in a wide range of sizes and shapes. They are a part of attractive exterior designs and also to enhance the look of interior walls.

CMU blocks that are used in the project may help it be designated as a "green" building. Also Read: Monolithic foundation

CMU Wall Details (CMU Block)

CMU blocks are made of Portland concrete, aggregates and water. As a building material CMU blocks have a variety of attractive qualities to builders and designers and builders, such as the following:

CMU blocks are produced in various sizes. They can be distinct by their thicknessand thickness - i.e. the the thickness of wall that they build. For example an example, the thickness of a CMU that is 6'' will be nominally 6 inches deep but the thickness of a 10 CMUis nominally 10 inches deep.

They also come in half-sizes. They can be useful in reducing the necessity to cut blocks at the corners or at the ends of walls. The architect should always create buildings with nominal dimensions of the closest half-block size in order to minimize the amount of waste and time caused by cutting blocks. Also Read: Stem wall foundation details

The nominal and real sizes that are available for CMU blocks are shown in the table below. The table below shows that CMU blocks of size 4 6 8 10, 10'' and 12"' are the typical sizes, but some manufacturers provide other sizes that are not shown below. 


Concrete masonry units work as the bearing wall that is helpful in the construction of homes or residential buildings.

It assists with vertical loads, such as flooring joists and arches, roof rafters, vaults and horizontal loads such as seismic activity and wind.

Most of the buildings currently are built with bricks or concrete blocks that form CMU walls. Also Read: Drain tile replacement cost

Like stone mortar Similar to stone masonry, the CMU system stacks concrete blocks by using mortar joints.

However, certain CMUs are made of mortar, which is a lot less systems that are able to be integrated to one another by an interlocking sequence of grooves and tongues. Also Read: Non bearing wall

Standard CMU Block Wall Detail

CMU manufacturers must adhere with ASTM specifications when making concrete blocks. The standards specify the right material, compressive strength, water absorption, dimensional tolerance and other characteristics of performance.

Concrete brick is constructed from concrete, similar to concrete blocks however, concrete bricks are made in sizes that correspond to the traditional clay bricks (i.e. 2 2/3'' tall).

The table below outlines the ASTM specifications applicable on concrete units. ASTM C90 covers the majority of conventional CMU constructions it is also the norm used by ICC codes.

CMU blocks come in endless shapes on the market. The image below shows most well-known types of CMU blocks. Also Read: Exterior wall finishing materials

CMU Block Weight

Weight of CMU blocks is dependent how dense the mix of cement that is used.

1.) CMU Blocks that are lightweight have a weight of less than 105 lbs/ft 3.,

2.) Medium-weight CMU Blocks comprise of a weight between the 105 3 lbs  and 125 lbs/ft and

3) CMU Blocks of normal weight are those that weigh more than the 125-lb./ft limit. 3..

CMUs that are lighter are more affordable need less labor in installation and generally possess better fire resistance characteristics. Larger units can reduce the transmission of sound, have larger compressive strengths, and also have a greater thermal storage capacity, however, they're more costly and take longer to set up. Architects need to define the CMU weight, if a specific weight is needed. Also Read: Flat roof pitch

CMU Blocks Compressive Strength

CMU blocks and masonry walls CMU block and walls made of masonry The compressive strength can vary from around 1,000psi (7 MPa) to 5000 pisi (34 MPa) depending on the kind of concrete used to construct the unit, as well as the quality of mortar employed. Also Read: Bridge steel beams

Advantages of CMU Walls:

1. CMUs are larger than bricks that are conventional, so it's more affordable to install CMUs in CMU system.

2. Steel reinforcements galvanized with zinc strengthen the CMU walls and help them take on more weight without cracking.

3. These kinds of walls are tolerant for large loads, which helps stones to go through different blocks, mortar, and tile components.

4. They also are beneficial in regions with extreme climates, such as tornadoes and hurricanes.

5. Additionally, the long-term durability of CMU systems prolongs the life of buildings, and eliminates the requirement for regular maintenance. Also Read: Bond break concrete

Disadvantages of CMU Walls:

1. CMU walls are able to absorb large quantities of water.

2. They are usually coated by a glaze, or made weatherproof to prevent water penetration.

3. They weigh more than steel or wood They are also not flexible enough to accommodate walls of entirely different dimensions and shapes.

4. Concrete blocks can also take up large areas, as their low thermal resistance is a challenge to insulation.

5. In addition, hiring contractors can cost you a fortune based on geographical area. Also Read: Elevation oblique drawing

CMU Wall Construction

The majority of walls built using CMUs have the same principles but the way they are applied to the elements may vary according to the shape, size and the purpose that the wall is used for.

Foundation. All CMU walls should be built on a sturdy and sturdy foundation of concrete poured. The depth and the size of the foundation will differ based on the dimensions of the block wall made of concrete and the weight it has to support. In general the foundation's depth must be at minimum twice as large as the wall it self and extends approximately 1 foot to that frostline. Also Read: Abutment bridge

Blocks for CMU. The selection of block size and shape tends to be based on the purpose of the wall as well as the design that the wall will be. The majority of wall panels made of CMU are constructed using a variety of types of blocks, particularly corner units and stretchers.

Mortar joints. Each joint is connected to the adjoining blocks using mortar of either the type of N (above the grade) as well as type S (below grade) mortar. For higher strength of walls, they are built in a way that the vertical joint is offset (staggered) between courses from one course to another. Also Read: Cedar wood

The freestanding wall isn't sturdy enough to be able to withstand the strains that could crack joints and damage walls, which is why both horizontal and vertical reinforcement is typical. Vertical reinforcement is in the form of straight length steel bars is embedded into wet concrete which is put in the block cavityat regular intervals.

Horizontal reinforcement is made up of metal strips that are laid in the wet mortar following each third and fourth block course.

The majority of CMU design is single-wythe walls. That means that they are constructed of single-wide rows of blocks that are stacked one on top of another. If there's a need for higher strength, you can build a double-wythe wall, in which two blocks are laid down. Also Read: Spread footing foundation

CMU Block Cost

CMU block costs is $3.50 for each square foot for split-face concrete or cinder blocks and the additional cost is $9-12 for each square foot for labor for installation and supplies as well as equipment.

An accomplished, 100 square foot project can cost anywhere from $1,200 to $1,500 dependent on the complexity of the construction. A typical 100 square-foot wall will cost approximately $1,350. Also Read:


What are CMU walls?

The concrete masonry unit (CMU) CMU is an ordinary-sized rectangular block utilized for building construction. CMUs are among the most versatile building materials accessible due to the broad array of styles they can achieve using CMUs. Also Read: Pier and beam foundation repair

Concrete Masonry Unit

Concrete Masonry Units Blocks are eco-friendly and flexible products for building which can be utilized as part of a beautiful exterior design in addition to adding the interest of interior walls.

What is a CMU partition wall?

According to the Masonry Society's TMS 402 code defines partition walls in terms of an inner wall with any structural functions. It is a wall that does not bear loads that is not able to support a floor aboveit, is not part of the horizontal system and isn't a wall that can withstand out-of-plane seismic or exterior wind loads. Also Read: Different Types of Stucco

CMU Block Dimensions

CMU blocks are produced in various sizes. They can be distinct by their thicknessand thickness - i.e. the the thickness of wall that they construct. For example an example, CMUs that are 6'' deep have a thickness of 10''. CMU of 6 inches will be nominally 6 inches deep and the thickness of a 10 CMUis nominally 10 inches deep.

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