lujuusluokan
Lujuusluokan is a Finnish term used to refer to a category or class that describes the mechanical strength of construction materials. In practice, lujuusluokka is used to categorize materials such as concrete and steel according to their resistance to stress, and the form lujuusluokan appears in phrases that indicate the chosen strength class for a project (for example, lujuusluokan C20/25 for concrete or lujuusluokan S275 for steel). The concept is standardized in construction codes and international standards, and it helps engineers specify material performance and ensure safety and durability.
For concrete, strength classes are often expressed with a designation such as C20/25, C30/37, or higher. These
For steel and other metals, lujuusluokan refers to classes based on strength properties such as yield strength
Overall, lujuusluokan serves as a practical shorthand in Finnish construction practice to communicate expected material performance,