Concrete Masonry Unit (CMU)

Definition

A concrete masonry unit (CMU) is a block of hardened concrete, with or without hollow cores, designed to be laid in the same manner as a brick.

Purpose

The purpose of CMUs is to provide a strong, durable, and versatile building material for constructing walls and other structural elements in both residential and commercial buildings.

Examples of Use

• CMUs are commonly used in the construction of load-bearing and non-load-bearing walls in buildings.
• They are used for constructing retaining walls due to their strength and stability.
• CMUs are utilized in building fire-rated walls because of their fire resistance properties.

Related Terms

• Concrete Block: Another term for a concrete masonry unit, highlighting its use in construction.
• Grouted Masonry: Masonry in which the spaces between CMUs are filled with grout to enhance structural integrity.
• Reinforced Masonry: Masonry construction that includes steel reinforcement for added strength.

Notes

CMUs come in various sizes, shapes, and finishes, allowing for flexibility in design and construction. They also offer good thermal mass, contributing to energy efficiency in buildings.