Cmu block weight

The versatility of concrete masonry as a construction assembly is well established through the variety of applications and structures it is used to create. Concrete masonry offers almost limitless combinations of color, shape, size, strength, texture, and density. Although most of the following discussions use lightweight and normal weight concrete masonry as examples, the properties of medium weight masonry can typically be expected to fall between the two. Cmu block weight that while some of these density-related properties, cmu block weight, such as sound transmission loss, may be directly referenced in building codes such as the International Building Code ref.

Standards applicable to cmu contain three classifications of weight, expressed in pounds per cubic foot: Normal Weight, Medium Weight, and Lightweight. Normal Weight is lbs. Medium Weight is less than to lbs. In addition to precision and split face gray, a scored split and standard color are normally available. Lightweight is less than lbs. Normally stocked in selected sizes in gray. Note: both Medium Weight and Lightweight units are made with "Lightweight" aggregates.

Cmu block weight

Many of these attributes are measured quantitatively, and often vary directly with the weight of the concrete masonry wall. Additional wall properties are also impacted by wall weight, although estimates of these properties are based on concrete density or aggregate type, rather than directly on wall weight. Examples of these properties include:. Tables 1 through 8 list concrete masonry wall weights for 4 to 16 inch to mm thick single wythe walls. Wall weights for grouted 4-in. NCMA and the companies disseminating this technical information disclaim any and all responsibility and liability for the accuracy and the application of the information contained in this publication. Member Login. Back to TEK Resources. Navigate Section. Wall weights are used directly to calculate: Sound transmission class STC ratings, with heavier walls providing higher STC ratings and hence better sound insulation. Seismic base shear force, with heavier walls resulting in higher base shear values. Heat capacity, an indication of thermal storage capacity, with heavier walls providing higher heat capacities and potentially better energy performance.

Table 1—4-in.

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Concrete blocks, also known as Concrete Masonry Units or CMUs, provide very durable structural and non-structural partitions. They are generally used as a backup wall that gets covered with a finish material or exposed in utilitarian spaces like mechanical rooms or basements. They can be painted to provide a cleaner finish, but they are also manufactured with different finishes that help improve the aesthetic quality over the traditional gray CMU. As with brick , CMUs have actual dimensions and nominal dimensions. The nominal dimension of a CMU is the actual dimension plus the width of the mortar joint. The nominal dimension works within the 4" grid that other construction materials follow. The graphic below shows the difference between nominal and actual sizes. They are identified by their depth — i. Concrete blocks also come in half-sizes, which are helpful in reducing the need to cut blocks in the field at corners or the end of walls. The architect should always attempt to design buildings using the nominal dimensions to the nearest half-block size to reduce waste and labor due to cut blocks.

Cmu block weight

These blocks are available in a variety of shapes, sizes, and finishes and are used to construct walls for buildings, retaining structures, and foundations. CMU walls offer several benefits such as strength, fire resistance, durability, and versatility. They are also cost-effective and easy to construct, making them a popular choice in construction projects. CMU blocks are made from Portland cement, aggregates, and water. As a building material , CMU blocks offer several attractive characteristics to designers and builders, including the following :. CMU blocks are manufactured in a variety of sizes. They are distinguished by their depth — i. These blocks also come in half-sizes, which are helpful in reducing the need to cut blocks in the field at corners or the end of walls. The architect always tries to design buildings using the nominal dimensions to the nearest half-block size to reduce waste and labor due to cut blocks. The nominal and actual sizes of CMU blocks are given in the below table.

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A higher NRC value indicates that more sound is absorbed by an assembly. Table 2—4-in. International Code Council, , and Request Info Careers. Tables 1 through 8 list concrete masonry wall weights for 4 to 16 inch to mm thick single wythe walls. Regardless of the density of a concrete masonry unit, the established movement control recommendations for concrete masonry construction are applicable. However, with respect to unit appearance, any change in aggregates whether a change in source or a change in aggregate type used to manufacture a concrete masonry unit may change its color or texture, particularly for units with mechanically altered features such as split or ground-face surfaces. Actual units may have higher or lower equivalent thicknesses than those shown, with corresponding higher or lower fire resistance ratings. National Concrete Masonry Association, Table 3—6-in. In general, 8-in. Table 4—8-in. National Concrete Masonry Association, Several production variables can affect the void structure, including degree of compaction, water content of the plastic mix, and aggregate gradation.

Standards applicable to cmu contain three classifications of weight, expressed in pounds per cubic foot: Normal Weight, Medium Weight, and Lightweight.

Note that while some of these density-related properties, such as sound transmission loss, may be directly referenced in building codes such as the International Building Code ref. Reducing the density of a concrete masonry unit can reduce the overall weight of a structure, and potentially reduce the required size of the supporting foundation, slab, or beam. NCMA and the companies disseminating this technical information disclaim any and all responsibility and liability for the accuracy and the application of the information contained in this publication. Back to TEK Resources. Thermal resistance, with lower density walls providing higher R-values and potentially better energy performance. Member Login. Additional wall properties are also impacted by wall weight, although estimates of these properties are based on concrete density or aggregate type, rather than directly on wall weight. Hence, while increased structural dead load increases seismic design forces, it also concurrently helps to resist wind loads. NRC measures the ability of a surface to absorb sound based on a scale of 0 to 1 , which can be an important characteristic in some applications, such as concert halls and assembly areas. All other design variables being equal, the STC value of masonry construction increases with increasing unit density. Concrete masonry offers almost limitless combinations of color, shape, size, strength, texture, and density. NCMA and the companies disseminating this technical information disclaim any and all responsibility and liability for the accuracy and the application of the information contained in this publication. Reducing the weight of a structure or element also reduces the seismic load a structure or element must be designed to resist, because the magnitude of seismic loading is a direct function of dead load. It is possible to produce a wide range of compressive strengths within each of the density classes. Tables 1 through 8 list concrete masonry wall weights for 4 to 16 inch to mm thick single wythe walls.