Material numbers on a card indicate what?

The material numbers on a card primarily indicate the use and test of the materials. This coding system is essential for identifying the specific applications for which each material is suitable, as well as any testing protocols that have been established to ensure quality and performance standards. The use and test information helps project managers, engineers, and workers to select the appropriate materials for specific tasks and to understand any testing requirements they might need to follow to verify that the materials meet necessary specifications.

In the context of earthwork and construction, knowing the designated use ensures that materials are applied effectively, thereby contributing to the overall success and safety of a project. Additionally, this information can help in inventory management and facilitate communication among project teams, ensuring that everyone understands the characteristics and capabilities of the materials being used.