What does the abbreviation "CB" stand for in construction drawings?

In construction drawings, the abbreviation "CB" commonly stands for "Cement Block." Cement blocks are often used in various construction applications, particularly for building walls in both residential and commercial projects. They provide strength, durability, and are essential when constructing foundations, retaining walls, and other structural components. This term is widely recognized among architects and construction professionals, which makes it crucial for those interpreting the drawings to understand its significance.

The other options, while they may represent terms used in construction, are not typically abbreviated as "CB" in standard practices. Understanding these terminologies and their abbreviations helps ensure effective communication and comprehension of construction plans and specifications.